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This interrupt controller is found in the Actions Semi Owl SoCs (S500,
S700 and S900) and provides support for handling up to 3 external
interrupt lines.
Each line can be independently configured as interrupt and triggers on
either of the edges or either of the levels. Additionally, each line
can also be masked individually.
Co-developed-by: Parthiban Nallathambi <pn@denx.de>
Co-developed-by: Saravanan Sekar <sravanhome@gmail.com>
Signed-off-by: Parthiban Nallathambi <pn@denx.de>
Signed-off-by: Saravanan Sekar <sravanhome@gmail.com>
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1a010ef0eb78831b5657d74a0fcdef7a8efb2ec4.1600114378.git.cristian.ciocaltea@gmail.com
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Actions Semi Owl SoCs SIRQ interrupt controller is found in S500, S700
and S900 SoCs and provides support for handling up to 3 external
interrupt lines.
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/c2046b747574ea56c1cf05c05b402c7f01d5e4fc.1600114378.git.cristian.ciocaltea@gmail.com
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interrupt controller
Add the required updates to describe the use of dw-apb-ictl as a primary
interrupt controller.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
[maz: commit message]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200924071754.4509-5-thunder.leizhen@huawei.com
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Add support to use dw-apb-ictl as primary interrupt controller.
Suggested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
[maz: minor fixups]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Haoyu Lv <lvhaoyu@huawei.com>
Link: https://lore.kernel.org/r/20200924071754.4509-4-thunder.leizhen@huawei.com
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Add the required abstractions that will help introducing hierarchical
domain support to the dw-apb-ictl driver.
No functional change.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
[maz: commit message, some cleanups]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Haoyu Lv <lvhaoyu@huawei.com>
Link: https://lore.kernel.org/r/20200924071754.4509-3-thunder.leizhen@huawei.com
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This lets the compiler inline it into import_iovec() generating
much better code.
Signed-off-by: David Laight <david.laight@aculab.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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There is no compat_sys_readv64v2 syscall, only a compat_sys_preadv64v2
one.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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In order to avoid compilation errors when a driver references set_handle_irq(),
but that the architecture doesn't select GENERIC_IRQ_MULTI_HANDLER,
add a stub function that will just WARN_ON_ONCE() if ever used.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
[maz: commit message]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200924071754.4509-2-thunder.leizhen@huawei.com
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Use ghcb_set_sw_scratch() to set the GHCB scratch field, which will also
set the corresponding bit in the GHCB valid_bitmap field to denote that
sw_scratch is actually valid.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Joerg Roedel <jroedel@suse.de>
Link: https://lkml.kernel.org/r/ba84deabdf44a7a880454fb351d189c6ad79d4ba.1601041106.git.thomas.lendacky@amd.com
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This causes all the bios to be submitted with REQ_NOWAIT, which can be
problematic on either btrfs or on file systems that otherwise use a mix
of block devices where only some of them support it.
For now, just remove the setting of plug->nowait = true.
Reported-by: Dan Melnic <dmm@fb.com>
Reported-by: Brian Foster <bfoster@redhat.com>
Fixes: b63534c41e20 ("io_uring: re-issue block requests that failed because of resources")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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To support runtime PM for hisi SAS driver (the driver is in directory
drivers/scsi/hisi_sas), we add device link between scsi_device->sdev_gendev
(consumer device) and hisi_hba->dev(supplier device) with flags
DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE.
After runtime suspended consumers and supplier, unload the dirver which
causes a hung.
We found that it called function device_release_driver_internal() to
release the supplier device (hisi_hba->dev), as the device link was
busy, it set the device link state to DL_STATE_SUPPLIER_UNBIND, and
then it called device_release_driver_internal() to release the consumer
device (scsi_device->sdev_gendev).
Then it would try to call pm_runtime_get_sync() to resume the consumer
device, but because consumer-supplier relation existed, it would try
to resume the supplier first, but as the link state was already
DL_STATE_SUPPLIER_UNBIND, so it skipped resuming the supplier and only
resumed the consumer which hanged (it sends IOs to resume scsi_device
while the SAS controller is suspended).
Simple flow is as follows:
device_release_driver_internal -> (supplier device)
if device_links_busy ->
device_links_unbind_consumers ->
...
WRITE_ONCE(link->status, DL_STATE_SUPPLIER_UNBIND)
device_release_driver_internal (consumer device)
pm_runtime_get_sync -> (consumer device)
...
__rpm_callback ->
rpm_get_suppliers ->
if link->state == DL_STATE_SUPPLIER_UNBIND -> skip the action of resuming the supplier
...
pm_runtime_clean_up_links
...
Correct suspend/resume ordering between a supplier device and its consumer
devices (resume the supplier device before resuming consumer devices, and
suspend consumer devices before suspending the supplier device) should be
guaranteed by runtime PM, but the state checks in rpm_get_supplier() and
rpm_put_supplier() break this rule, so remove them.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
[ rjw: Subject and changelog edits ]
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Commit 88b7381a939d ("USB: Select better matching USB drivers when
available") inadvertently broke usbip functionality. The commit in
question allows USB device drivers to be explicitly matched with
USB devices via the use of driver-provided identifier tables and
match functions, which is useful for a specialised device driver
to be chosen for a device that can also be handled by another,
more generic, device driver.
Prior, the USB device section of usb_device_match() had an
unconditional "return 1" statement, which allowed user-space to bind
USB devices to the usbip_host device driver, if desired. However,
the aforementioned commit changed the default/fallback return
value to zero. This breaks device drivers such as usbip_host, so
this commit restores the legacy behaviour, but only if a device
driver does not have an id_table and a match() function.
In addition, if usb_device_match is called for a device driver
and device pair where the device does not match the id_table of the
device driver in question, then the device driver will be disqualified
for the device. This allows avoiding the default case of "return 1",
which prevents undesirable probe() calls to a driver even though
its id_table did not match the device.
Finally, this commit changes the specialised-driver-to-generic-driver
transition code so that when a device driver returns -ENODEV, a more
generic device driver is only considered if the current device driver
does not have an id_table and a match() function. This ensures that
"generic" drivers such as usbip_host will not be considered specialised
device drivers and will not cause the device to be locked in to the
generic device driver, when a more specialised device driver could be
tried.
All of these changes restore usbip functionality without regressions,
ensure that the specialised/generic device driver selection logic works
as expected with the usb and apple-mfi-fastcharge drivers, and do not
negatively affect the use of devices provided by dummy_hcd.
Fixes: 88b7381a939d ("USB: Select better matching USB drivers when available")
Cc: <stable@vger.kernel.org> # 5.8
Cc: Bastien Nocera <hadess@hadess.net>
Cc: Valentina Manea <valentina.manea.m@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: <syzkaller@googlegroups.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: M. Vefa Bicakci <m.v.b@runbox.com>
Link: https://lore.kernel.org/r/20200922110703.720960-5-m.v.b@runbox.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This commit resolves a minor bug in the selection/discovery of more
specific USB device drivers for devices that are currently bound to
generic USB device drivers.
The bug is related to the way a candidate USB device driver is
compared against the generic USB device driver. The code in
is_dev_usb_generic_driver() assumes that the device driver in question
is a USB device driver by calling to_usb_device_driver(dev->driver)
to downcast; however I have observed that this assumption is not always
true, through code instrumentation.
This commit avoids the incorrect downcast altogether by comparing
the USB device's driver (i.e., dev->driver) to the generic USB
device driver directly. This method was suggested by Alan Stern.
This bug was found while investigating Andrey Konovalov's report
indicating usbip device driver misbehaviour with the recently merged
generic USB device driver selection feature. The report is linked
below.
Fixes: d5643d2249b2 ("USB: Fix device driver race")
Cc: <stable@vger.kernel.org> # 5.8
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Bastien Nocera <hadess@hadess.net>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Valentina Manea <valentina.manea.m@gmail.com>
Cc: <syzkaller@googlegroups.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: M. Vefa Bicakci <m.v.b@runbox.com>
Link: https://lore.kernel.org/r/20200922110703.720960-4-m.v.b@runbox.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This commit resolves a bug in the selection/discovery of more
specific USB device drivers for devices that are currently bound to
generic USB device drivers.
The bug is in the logic that determines whether a device currently
bound to a generic USB device driver should be re-probed by a
more specific USB device driver or not. The code in
__usb_bus_reprobe_drivers() used to have the following lines:
if (usb_device_match_id(udev, new_udriver->id_table) == NULL &&
(!new_udriver->match || new_udriver->match(udev) != 0))
return 0;
ret = device_reprobe(dev);
As the reader will notice, the code checks whether the USB device in
consideration matches the identifier table (id_table) of a specific
USB device_driver (new_udriver), followed by a similar check, but this
time with the USB device driver's match function. However, the match
function's return value is not checked correctly. When match() returns
zero, it means that the specific USB device driver is *not* applicable
to the USB device in question, but the code then goes on to reprobe the
device with the new USB device driver under consideration. All this to
say, the logic is inverted.
This bug was found by code inspection and instrumentation while
investigating the root cause of the issue reported by Andrey Konovalov,
where usbip took over syzkaller's virtual USB devices in an undesired
manner. The report is linked below.
Fixes: d5643d2249b2 ("USB: Fix device driver race")
Cc: <stable@vger.kernel.org> # 5.8
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Bastien Nocera <hadess@hadess.net>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Valentina Manea <valentina.manea.m@gmail.com>
Cc: <syzkaller@googlegroups.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: M. Vefa Bicakci <m.v.b@runbox.com>
Link: https://lore.kernel.org/r/20200922110703.720960-3-m.v.b@runbox.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This commit reverts commit 7a2f2974f265 ("usbip: Implement a match
function to fix usbip").
In summary, commit d5643d2249b2 ("USB: Fix device driver race")
inadvertently broke usbip functionality, which I resolved in an incorrect
manner by introducing a match function to usbip, usbip_match(), that
unconditionally returns true.
However, the usbip_match function, as is, causes usbip to take over
virtual devices used by syzkaller for USB fuzzing, which is a regression
reported by Andrey Konovalov.
Furthermore, in conjunction with the fix of another bug, handled by another
patch titled "usbcore/driver: Fix specific driver selection" in this patch
set, the usbip_match function causes unexpected USB subsystem behaviour
when the usbip_host driver is loaded. The unexpected behaviour can be
qualified as follows:
- If commit 41160802ab8e ("USB: Simplify USB ID table match") is included
in the kernel, then all USB devices are bound to the usbip_host
driver, which appears to the user as if all USB devices were
disconnected.
- If the same commit (41160802ab8e) is not in the kernel (as is the case
with v5.8.10) then all USB devices are re-probed and re-bound to their
original device drivers, which appears to the user as a disconnection
and re-connection of USB devices.
Please note that this commit will make usbip non-operational again,
until yet another patch in this patch set is merged, titled
"usbcore/driver: Accommodate usbip".
Cc: <stable@vger.kernel.org> # 5.8: 41160802ab8e: USB: Simplify USB ID table match
Cc: <stable@vger.kernel.org> # 5.8
Cc: Bastien Nocera <hadess@hadess.net>
Cc: Valentina Manea <valentina.manea.m@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: <syzkaller@googlegroups.com>
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: M. Vefa Bicakci <m.v.b@runbox.com>
Link: https://lore.kernel.org/r/20200922110703.720960-2-m.v.b@runbox.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Include the linux/idle_inject.h header to fix W=1 build warning:
drivers/powercap/idle_inject.c:152:6: warning: no previous prototype for ‘idle_inject_set_duration’ [-Wmissing-prototypes]
drivers/powercap/idle_inject.c:167:6: warning: no previous prototype for ‘idle_inject_get_duration’ [-Wmissing-prototypes]
drivers/powercap/idle_inject.c:179:6: warning: no previous prototype for ‘idle_inject_set_latency’ [-Wmissing-prototypes]
drivers/powercap/idle_inject.c:195:5: warning: no previous prototype for ‘idle_inject_start’ [-Wmissing-prototypes]
drivers/powercap/idle_inject.c:227:6: warning: no previous prototype for ‘idle_inject_stop’ [-Wmissing-prototypes]
drivers/powercap/idle_inject.c:299:28: warning: no previous prototype for ‘idle_inject_register’ [-Wmissing-prototypes]
drivers/powercap/idle_inject.c:345:6: warning: no previous prototype for ‘idle_inject_unregister’ [-Wmissing-prototypes]
Signed-off-by: Pujin Shi <shipj@lemote.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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We need to move the closing of the src_device out of all the device
replace locking, but we definitely want to zero out the superblock
before we commit the last time to make sure the device is properly
removed. Handle this by pushing btrfs_scratch_superblocks into
btrfs_dev_replace_finishing, and then later on we'll move the src_device
closing and freeing stuff where we need it to be.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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During ice_vsi_setup, if ice_cfg_vsi_lan fails, it does not properly
release memory associated with the VSI rings. If we had used devres
allocations for the rings, this would be ok. However, we use kzalloc and
kfree_rcu for these ring structures.
Using the correct label to cleanup the rings during ice_vsi_setup
highlights an issue in the ice_vsi_clear_rings function: it can leave
behind stale ring pointers in the q_vectors structure.
When releasing rings, we must also ensure that no q_vector associated
with the VSI will point to this ring again. To resolve this, loop over
all q_vectors and release their ring mapping. Because we are about to
free all rings, no q_vector should remain pointing to any of the rings
in this VSI.
Fixes: 5513b920a4f7 ("ice: Update Tx scheduler tree for VSI multi-Tx queue support")
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
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The ice_setup_pf_sw function can cause a memory leak if register_netdev
fails, due to accidentally failing to free the VSI rings. Fix the memory
leak by using ice_vsi_release, ensuring we actually go through the full
teardown process.
This should be safe even if the netdevice is not registered because we
will have set the netdev pointer to NULL, ensuring ice_vsi_release won't
call unregister_netdev.
An alternative fix would be moving management of the PF VSI netdev into
the main VSI setup code. This is complicated and likely requires
significant refactor in how we manage VSIs
Fixes: 3a858ba392c3 ("ice: Add support for VSI allocation and deallocation")
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
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It appears that the ice_suspend flow is missing a call to pci_save_state
and this is triggering the message "State of device not saved by
ice_suspend" and a call trace. Fix it.
Fixes: 769c500dcc1e ("ice: Add advanced power mgmt for WoL")
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
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When calling iavf_resume there was a crash because wrong
function was used to get iavf_adapter and net_device pointers.
Changed how iavf_resume is getting iavf_adapter and net_device
pointers from pci_dev.
Fixes: 5eae00c57f5e ("i40evf: main driver core")
Signed-off-by: Sylwester Dziedziuch <sylwesterx.dziedziuch@intel.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
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An iocg may have 0 debt but non-zero delay. The current debt forgiveness
logic doesn't act on such iocgs. This can lead to unexpected behaviors - an
iocg with a little bit of debt will have its delay canceled through debt
forgiveness but one w/o any debt but active delay will have to wait out
until its delay decays out.
This patch updates the debt handling logic so that it treats delays the same
as debts. If either debt or delay is active, debt forgiveness logic kicks in
and acts on both the same way.
Also, avoid turning the debt and delay directly to zero as that can confuse
state transitions.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Debt forgiveness logic was counting the number of consecutive !busy periods
as the trigger condition. While this usually works, it can easily be thrown
off by temporary fluctuations especially on configurations w/ short periods.
This patch reimplements debt forgiveness so that:
* Use the average usage over the forgiveness period instead of counting
consecutive periods.
* Debt is reduced at around the target rate (1/2 every 100ms) regardless of
ioc period duration.
* Usage threshold is raised to 50%. Combined with the preceding changes and
the switch to average usage, this makes debt forgivness a lot more
effective at reducing the amount of unnecessary idleness.
* Constants are renamed with DFGV_ prefix.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Debt sets the initial delay duration which is decayed over time. The current
debt reduction halved the debt but didn't change the delay. It prevented
future debts from increasing delay but didn't do anything to lower the
existing delay, limiting the mechanism's ability to reduce unnecessary
idling.
Reset iocg->delay to 0 after debt reduction so that iocg_kick_waitq()
recalculates new delay value based on the reduced debt amount.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Debt reduction was blocked if any iocg was short on budget in the past
period to avoid reducing debts while some iocgs are saturated. However, this
ends up unnecessarily blocking debt reduction due to temporary local
imbalances when the device is generally being underutilized, while also
failing to block when the underlying device is overwhelmed and the usage
becomes low from high latency.
Given that debt accumulation mostly happens with swapout bursts which can
significantly deteriorate the underlying device's latency response, the
current logic is not great.
Let's replace it with ioc->busy_level based condition so that we block debt
reduction when the underlying device is being saturated. ioc_forgive_debts()
call is moved after busy_level determination.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Debt reduction logic is going to be improved and expanded. Factor it out
into ioc_forgive_debts() and generalize the comment a bit. No functional
change.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux
Pull devfreq updates for 5.9-rc7 from Chanwoo Choi:
"1. Update devfreq core
- Add missing timer type to devfreq_summary debugfs node.
2. Fix devfreq device driver
- Fix the exception handling about clock on tegra30-devfreq.c"
* tag 'devfreq-fixes-for-5.9-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux:
PM / devfreq: tegra30: Disable clock on error in probe
PM / devfreq: Add timer type to devfreq_summary debugfs
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Add DM target feature flag DM_TARGET_NOWAIT which advertises that
target works with REQ_NOWAIT bios.
Add dm_table_supports_nowait() and update dm_table_set_restrictions()
to set/clear QUEUE_FLAG_NOWAIT accordingly.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Add QUEUE_FLAG_NOWAIT to allow a block device to advertise support for
REQ_NOWAIT. Bio-based devices may set QUEUE_FLAG_NOWAIT where
applicable.
Update QUEUE_FLAG_MQ_DEFAULT to include QUEUE_FLAG_NOWAIT. Also
update submit_bio_checks() to verify it is set for REQ_NOWAIT bios.
Reported-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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No need to go through the hd_struct to find the partition number.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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No need to go through the hd_struct to find the partition number.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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bd_contains is never NULL for an open block device. In addition ibd_bd
is always set to a block device that was exclusively opened by the
target code, so the holder is guranteed to be ib_dev as well.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The ->bd_contains field is set by __blkdev_get and drivers have no
business manipulating it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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bd_disk is set on all block devices, including those for partitions.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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bd_disk is set on all block devices, including those for partitions.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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To check for partitions of the same disk bd_contains works as well, but
bd_disk is way more obvious.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Add a littler helper to make the somewhat arcane bd_contains checks a
little more obvious.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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bd_contains is an implementation detail and should not be mentioned in
a userspace API documentation.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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commit 7b6620d7db56 ("block: remove REQ_NOWAIT_INLINE") removed the
REQ_NOWAIT_INLINE related code, but the diff wasn't applied to
blk_types.h somehow.
Then commit 2771cefeac49 ("block: remove the REQ_NOWAIT_INLINE flag")
removed the REQ_NOWAIT_INLINE flag while the BLK_QC_T_EAGAIN flag still
remains.
Fixes: 7b6620d7db56 ("block: remove REQ_NOWAIT_INLINE")
Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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https://git.kernel.org/pub/scm/linux/kernel/git/song/md into for-5.10/drivers
Pull MD updates from Song.
* 'md-next' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md:
md/raid10: improve discard request for far layout
md/raid10: improve raid10 discard request
md/raid10: pull codes that wait for blocked dev into one function
md/raid10: extend r10bio devs to raid disks
md: add md_submit_discard_bio() for submitting discard bio
md: Simplify code with existing definition RESYNC_SECTORS in raid10.c
md/raid5: reallocate page array after setting new stripe_size
md/raid5: resize stripe_head when reshape array
md/raid5: let multiple devices of stripe_head share page
md/raid6: let async recovery function support different page offset
md/raid6: let syndrome computor support different page offset
md/raid5: convert to new xor compution interface
md/raid5: add new xor function to support different page offset
md/raid5: make async_copy_data() to support different page offset
md/raid5: add a new member of offset into r5dev
md: only calculate blocksize once and use i_blocksize()
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If we cancel these requests, we'll leak the memory associated with the
filename. Add them to the table of ops that need cleaning, if
REQ_F_NEED_CLEANUP is set.
Cc: stable@vger.kernel.org
Fixes: e62753e4e292 ("io_uring: call statx directly")
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Reset the MMU context during kvm_set_cr4() if SMAP or PKE is toggled.
Recent commits to (correctly) not reload PDPTRs when SMAP/PKE are
toggled inadvertantly skipped the MMU context reset due to the mask
of bits that triggers PDPTR loads also being used to trigger MMU context
resets.
Fixes: 427890aff855 ("kvm: x86: Toggling CR4.SMAP does not load PDPTEs in PAE mode")
Fixes: cb957adb4ea4 ("kvm: x86: Toggling CR4.PKE does not load PDPTEs in PAE mode")
Cc: Jim Mattson <jmattson@google.com>
Cc: Peter Shier <pshier@google.com>
Cc: Oliver Upton <oupton@google.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200923215352.17756-1-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Based on Google-internal RSEQ work done by Paul Turner and Andrew
Hunter.
This patch adds a selftest for MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ.
The test quite often fails without the previous patch in this
patchset, but consistently passes with it.
Signed-off-by: Peter Oskolkov <posk@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lkml.kernel.org/r/20200923233618.2572849-3-posk@google.com
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This patch adds rseq_offset_deref_addv() function to
tools/testing/selftests/rseq/rseq-x86.h, to be used in a selftest in
the next patch in the patchset.
Once an architecture adds support for this function they should define
"RSEQ_ARCH_HAS_OFFSET_DEREF_ADDV".
Signed-off-by: Peter Oskolkov <posk@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lkml.kernel.org/r/20200923233618.2572849-2-posk@google.com
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This patchset is based on Google-internal RSEQ work done by Paul
Turner and Andrew Hunter.
When working with per-CPU RSEQ-based memory allocations, it is
sometimes important to make sure that a global memory location is no
longer accessed from RSEQ critical sections. For example, there can be
two per-CPU lists, one is "active" and accessed per-CPU, while another
one is inactive and worked on asynchronously "off CPU" (e.g. garbage
collection is performed). Then at some point the two lists are
swapped, and a fast RCU-like mechanism is required to make sure that
the previously active list is no longer accessed.
This patch introduces such a mechanism: in short, membarrier() syscall
issues an IPI to a CPU, restarting a potentially active RSEQ critical
section on the CPU.
Signed-off-by: Peter Oskolkov <posk@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lkml.kernel.org/r/20200923233618.2572849-1-posk@google.com
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Barry Song noted the following
Something is wrong. In find_busiest_group(), we are checking if
src has higher load, however, in task_numa_find_cpu(), we are
checking if dst will have higher load after balancing. It seems
it is not sensible to check src.
It maybe cause wrong imbalance value, for example,
if dst_running = env->dst_stats.nr_running + 1 results in 3 or
above, and src_running = env->src_stats.nr_running - 1 results
in 1;
The current code is thinking imbalance as 0 since src_running is
smaller than 2. This is inconsistent with load balancer.
Basically, in find_busiest_group(), the NUMA imbalance is ignored if moving
a task "from an almost idle domain" to a "domain with spare capacity". This
patch forbids movement "from a misplaced domain" to "an almost idle domain"
as that is closer to what the CPU load balancer expects.
This patch is not a universal win. The old behaviour was intended to allow
a task from an almost idle NUMA node to migrate to its preferred node if
the destination had capacity but there are corner cases. For example,
a NAS compute load could be parallelised to use 1/3rd of available CPUs
but not all those potential tasks are active at all times allowing this
logic to trigger. An obvious example is specjbb 2005 running various
numbers of warehouses on a 2 socket box with 80 cpus.
specjbb
5.9.0-rc4 5.9.0-rc4
vanilla dstbalance-v1r1
Hmean tput-1 46425.00 ( 0.00%) 43394.00 * -6.53%*
Hmean tput-2 98416.00 ( 0.00%) 96031.00 * -2.42%*
Hmean tput-3 150184.00 ( 0.00%) 148783.00 * -0.93%*
Hmean tput-4 200683.00 ( 0.00%) 197906.00 * -1.38%*
Hmean tput-5 236305.00 ( 0.00%) 245549.00 * 3.91%*
Hmean tput-6 281559.00 ( 0.00%) 285692.00 * 1.47%*
Hmean tput-7 338558.00 ( 0.00%) 334467.00 * -1.21%*
Hmean tput-8 340745.00 ( 0.00%) 372501.00 * 9.32%*
Hmean tput-9 424343.00 ( 0.00%) 413006.00 * -2.67%*
Hmean tput-10 421854.00 ( 0.00%) 434261.00 * 2.94%*
Hmean tput-11 493256.00 ( 0.00%) 485330.00 * -1.61%*
Hmean tput-12 549573.00 ( 0.00%) 529959.00 * -3.57%*
Hmean tput-13 593183.00 ( 0.00%) 555010.00 * -6.44%*
Hmean tput-14 588252.00 ( 0.00%) 599166.00 * 1.86%*
Hmean tput-15 623065.00 ( 0.00%) 642713.00 * 3.15%*
Hmean tput-16 703924.00 ( 0.00%) 660758.00 * -6.13%*
Hmean tput-17 666023.00 ( 0.00%) 697675.00 * 4.75%*
Hmean tput-18 761502.00 ( 0.00%) 758360.00 * -0.41%*
Hmean tput-19 796088.00 ( 0.00%) 798368.00 * 0.29%*
Hmean tput-20 733564.00 ( 0.00%) 823086.00 * 12.20%*
Hmean tput-21 840980.00 ( 0.00%) 856711.00 * 1.87%*
Hmean tput-22 804285.00 ( 0.00%) 872238.00 * 8.45%*
Hmean tput-23 795208.00 ( 0.00%) 889374.00 * 11.84%*
Hmean tput-24 848619.00 ( 0.00%) 966783.00 * 13.92%*
Hmean tput-25 750848.00 ( 0.00%) 903790.00 * 20.37%*
Hmean tput-26 780523.00 ( 0.00%) 962254.00 * 23.28%*
Hmean tput-27 1042245.00 ( 0.00%) 991544.00 * -4.86%*
Hmean tput-28 1090580.00 ( 0.00%) 1035926.00 * -5.01%*
Hmean tput-29 999483.00 ( 0.00%) 1082948.00 * 8.35%*
Hmean tput-30 1098663.00 ( 0.00%) 1113427.00 * 1.34%*
Hmean tput-31 1125671.00 ( 0.00%) 1134175.00 * 0.76%*
Hmean tput-32 968167.00 ( 0.00%) 1250286.00 * 29.14%*
Hmean tput-33 1077676.00 ( 0.00%) 1060893.00 * -1.56%*
Hmean tput-34 1090538.00 ( 0.00%) 1090933.00 * 0.04%*
Hmean tput-35 967058.00 ( 0.00%) 1107421.00 * 14.51%*
Hmean tput-36 1051745.00 ( 0.00%) 1210663.00 * 15.11%*
Hmean tput-37 1019465.00 ( 0.00%) 1351446.00 * 32.56%*
Hmean tput-38 1083102.00 ( 0.00%) 1064541.00 * -1.71%*
Hmean tput-39 1232990.00 ( 0.00%) 1303623.00 * 5.73%*
Hmean tput-40 1175542.00 ( 0.00%) 1340943.00 * 14.07%*
Hmean tput-41 1127826.00 ( 0.00%) 1339492.00 * 18.77%*
Hmean tput-42 1198313.00 ( 0.00%) 1411023.00 * 17.75%*
Hmean tput-43 1163733.00 ( 0.00%) 1228253.00 * 5.54%*
Hmean tput-44 1305562.00 ( 0.00%) 1357886.00 * 4.01%*
Hmean tput-45 1326752.00 ( 0.00%) 1406061.00 * 5.98%*
Hmean tput-46 1339424.00 ( 0.00%) 1418451.00 * 5.90%*
Hmean tput-47 1415057.00 ( 0.00%) 1381570.00 * -2.37%*
Hmean tput-48 1392003.00 ( 0.00%) 1421167.00 * 2.10%*
Hmean tput-49 1408374.00 ( 0.00%) 1418659.00 * 0.73%*
Hmean tput-50 1359822.00 ( 0.00%) 1391070.00 * 2.30%*
Hmean tput-51 1414246.00 ( 0.00%) 1392679.00 * -1.52%*
Hmean tput-52 1432352.00 ( 0.00%) 1354020.00 * -5.47%*
Hmean tput-53 1387563.00 ( 0.00%) 1409563.00 * 1.59%*
Hmean tput-54 1406420.00 ( 0.00%) 1388711.00 * -1.26%*
Hmean tput-55 1438804.00 ( 0.00%) 1387472.00 * -3.57%*
Hmean tput-56 1399465.00 ( 0.00%) 1400296.00 * 0.06%*
Hmean tput-57 1428132.00 ( 0.00%) 1396399.00 * -2.22%*
Hmean tput-58 1432385.00 ( 0.00%) 1386253.00 * -3.22%*
Hmean tput-59 1421612.00 ( 0.00%) 1371416.00 * -3.53%*
Hmean tput-60 1429423.00 ( 0.00%) 1389412.00 * -2.80%*
Hmean tput-61 1396230.00 ( 0.00%) 1351122.00 * -3.23%*
Hmean tput-62 1418396.00 ( 0.00%) 1383098.00 * -2.49%*
Hmean tput-63 1409918.00 ( 0.00%) 1374662.00 * -2.50%*
Hmean tput-64 1410236.00 ( 0.00%) 1376216.00 * -2.41%*
Hmean tput-65 1396405.00 ( 0.00%) 1364418.00 * -2.29%*
Hmean tput-66 1395975.00 ( 0.00%) 1357326.00 * -2.77%*
Hmean tput-67 1392986.00 ( 0.00%) 1349642.00 * -3.11%*
Hmean tput-68 1386541.00 ( 0.00%) 1343261.00 * -3.12%*
Hmean tput-69 1374407.00 ( 0.00%) 1342588.00 * -2.32%*
Hmean tput-70 1377513.00 ( 0.00%) 1334654.00 * -3.11%*
Hmean tput-71 1369319.00 ( 0.00%) 1334952.00 * -2.51%*
Hmean tput-72 1354635.00 ( 0.00%) 1329005.00 * -1.89%*
Hmean tput-73 1350933.00 ( 0.00%) 1318942.00 * -2.37%*
Hmean tput-74 1351714.00 ( 0.00%) 1316347.00 * -2.62%*
Hmean tput-75 1352198.00 ( 0.00%) 1309974.00 * -3.12%*
Hmean tput-76 1349490.00 ( 0.00%) 1286064.00 * -4.70%*
Hmean tput-77 1336131.00 ( 0.00%) 1303684.00 * -2.43%*
Hmean tput-78 1308896.00 ( 0.00%) 1271024.00 * -2.89%*
Hmean tput-79 1326703.00 ( 0.00%) 1290862.00 * -2.70%*
Hmean tput-80 1336199.00 ( 0.00%) 1291629.00 * -3.34%*
The performance at the mid-point is better but not universally better. The
patch is a mixed bag depending on the workload, machine and overall
levels of utilisation. Sometimes it's better (sometimes much better),
other times it is worse (sometimes much worse). Given that there isn't a
universally good decision in this section and more people seem to prefer
the patch then it may be best to keep the LB decisions consistent and
revisit imbalance handling when the load balancer code changes settle down.
Jirka Hladky added the following observation.
Our results are mostly in line with what you see. We observe
big gains (20-50%) when the system is loaded to 1/3 of the
maximum capacity and mixed results at the full load - some
workloads benefit from the patch at the full load, others not,
but performance changes at the full load are mostly within the
noise of results (+/-5%). Overall, we think this patch is helpful.
[mgorman@techsingularity.net: Rewrote changelog]
Fixes: fb86f5b211 ("sched/numa: Use similar logic to the load balancer for moving between domains with spare capacity")
Signed-off-by: Barry Song <song.bao.hua@hisilicon.com>
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200921221849.GI3179@techsingularity.net
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The busy_factor, which increases load balance interval when a cpu is busy,
is set to 32 by default. This value generates some huge LB interval on
large system like the THX2 made of 2 node x 28 cores x 4 threads.
For such system, the interval increases from 112ms to 3584ms at MC level.
And from 228ms to 7168ms at NUMA level.
Even on smaller system, a lower busy factor has shown improvement on the
fair distribution of the running time so let reduce it for all.
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Phil Auld <pauld@redhat.com>
Link: https://lkml.kernel.org/r/20200921072424.14813-5-vincent.guittot@linaro.org
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sched domains tend to trigger simultaneously the load balance loop but
the larger domains often need more time to collect statistics. This
slowness makes the larger domain trying to detach tasks from a rq whereas
tasks already migrated somewhere else at a sub-domain level. This is not
a real problem for idle LB because the period of smaller domains will
increase with its CPUs being busy and this will let time for higher ones
to pulled tasks. But this becomes a problem when all CPUs are already busy
because all domains stay synced when they trigger their LB.
A simple way to minimize simultaneous LB of all domains is to decrement the
the busy interval by 1 jiffies. Because of the busy_factor, the interval of
larger domain will not be a multiple of smaller ones anymore.
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Phil Auld <pauld@redhat.com>
Link: https://lkml.kernel.org/r/20200921072424.14813-4-vincent.guittot@linaro.org
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The 25% default imbalance threshold for DIE and NUMA domain is large
enough to generate significant unfairness between threads. A typical
example is the case of 11 threads running on 2x4 CPUs. The imbalance of
20% between the 2 groups of 4 cores is just low enough to not trigger
the load balance between the 2 groups. We will have always the same 6
threads on one group of 4 CPUs and the other 5 threads on the other
group of CPUS. With a fair time sharing in each group, we ends up with
+20% running time for the group of 5 threads.
Consider decreasing the imbalance threshold for overloaded case where we
use the load to balance task and to ensure fair time sharing.
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Phil Auld <pauld@redhat.com>
Acked-by: Hillf Danton <hdanton@sina.com>
Link: https://lkml.kernel.org/r/20200921072424.14813-3-vincent.guittot@linaro.org
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