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2018-04-10cpufreq: SCMI: Don't validate the frequency table twiceViresh Kumar
The cpufreq core is already validating the CPU frequency table after calling the ->init() callback of the cpufreq drivers and the drivers don't need to do the same anymore. Though they need to set the policy->freq_table field directly from the ->init() callback now. Stop validating the frequency table from SCMI driver. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-04-10cpufreq: CPPC: Initialize shared perf capabilities of CPUsShunyong Yang
When multiple CPUs are related in one cpufreq policy, the first online CPU will be chosen by default to handle cpufreq operations. Let's take cpu0 and cpu1 as an example. When cpu0 is offline, policy->cpu will be shifted to cpu1. cpu1's perf capabilities should be initialized. Otherwise, perf capabilities are 0s and speed change can not take effect. This patch copies perf capabilities of the first online CPU to other shared CPUs when policy shared type is CPUFREQ_SHARED_TYPE_ANY. Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Shunyong Yang <shunyong.yang@hxt-semitech.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-04-10cpufreq: armada-37xx: Fix clock leakGregory CLEMENT
There was no clk_put() balancing the clk_get(). This commit fixes it. Fixes: 92ce45fb875d (cpufreq: Add DVFS support for Armada 37xx) Cc: 4.16+ <stable@vger.kernel.org> # 4.16+ Reported-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-04-10cpufreq: CPPC: Don't set transition_latencyViresh Kumar
Now that the driver has started to set transition_delay_us directly, there is no need to set transition_latency along with it, as it is not used by the cpufreq core. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-04-10cpufreq: ti-cpufreq: Use builtin_platform_driver()Viresh Kumar
This driver can not be built as a module and there is no need of the platform driver unregister part. Use builtin_platform_driver() instead of module_platform_driver(). Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-04-10cpufreq: intel_pstate: Do not include debugfs.hRafael J. Wysocki
The intel_pstate driver doesn't use debugfs any more, so drop linux/debugfs.h from the list of included headers in it. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
2018-04-09Merge remote-tracking branch ↵Benson Leung
'chrome-platform-stop-being-a-platform-driver-plus-atmel_mxt_ts-for-v4.17' into working-branch-for-4.17
2018-04-09platform/chrome: cros_ec_lpc: Add support for Google devices using custom ↵Salvatore Bellizzi
coreboot firmware This patch adds generic device information to the DMI table of the cros_ec_lpc driver, needed for Chromebooks/boxes using a custom coreboot firmware. The DMI info would not contain "Google_*" as BIOS version string, instead the system vendor string would still be "GOOGLE", so this seems to be a reasonable match for every Chromebook/box running a custom firmware. Signed-off-by: Salvatore Bellizzi <lkml@seppia.net> Signed-off-by: Vittorio Gambaletta <linuxbugs@vittgam.net> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09platform/chrome: cros_ec_lpc: wake up from s2idle on Chrome ECWenkai Du
Chrome platform installed a Chrome EC notify handler which prevents default EC GPE handler getting called. Add pm_system_wakeup to the Chrome EC notify handler so wake up from s2idle can happen. Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Wenkai Du <wenkai.du@intel.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09Input: atmel_mxt_ts - remove platform data supportDmitry Torokhov
Now that there are no users of custom Atmel platform data, and everyone has switched to the generic device properties, we can remove support for the platform data. Acked-by: Nick Dyer <nick@shmanahar.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09platform/chrome: chromeos_laptop - discard data for unneeded boardsDmitry Torokhov
Mark board data as __intconst/__initdata and make a copy of appropriate entry once we identified the board we are running on. The rest of the data will be discarded once the kernel finished booting (or module finished loading). Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09platform/chrome: chromeos_laptop - use device properties for PixelDmitry Torokhov
Now that Atmel driver uses generic device properties we can use them instead of platform data when setting up touchpad on the original Google Pixel. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09platform/chrome: chromeos_laptop - rely on I2C to set up interrupt triggerDmitry Torokhov
Instead of passing interrupt flags via platform data to drivers, or hoping that drivers will do the right thing and set it up the way we need, let's set up IRQ resource and attach it to the I2C board info, and let I2C core set it up for us. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09platform/chrome: chromeos_laptop - use I2C notifier to create devicesDmitry Torokhov
Instead of using platform device and deferrals to handle the case when i2C adapters appear late in the game, and not handling device unbinding all that well, let's switch to using I2C bus notifier to get told when a new I2C adapter appears in the system, and attempt to add appropriate devices at that time. In case when we have 2 Designware adapters in the system (Acer C720), instead of counting and hoping they get enumerate din the right order, let's switch to using their PCI devids (slot/function) that should be stable. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09platform/chrome: chromeos_laptop - parse DMI IRQ data onceDmitry Torokhov
Instead of trying to parse DMI IRQ data every time we try to instantiate a device, let's do it once, when we identify the device we are working with. This allows us to mark chromeos_laptop_get_irq_from_dmi() as __init and discard it once module is initialized. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09platform/chrome: chromeos_laptop - rework i2c peripherals initializationDmitry Torokhov
Instead of having separate setup() functions responsible for instantiating i2c client for each peripheral, let's generalize the behavior and use common code for instantiating all i2c peripherals. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-10s390/zcrypt: Remove deprecated zcrypt proc interface.Harald Freudenberger
This patch removes the deprecated zcrypt proc interface. It is outdated and deprecated and does not support the latest 3 generations of CEX cards. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-10s390/zcrypt: Remove deprecated ioctls.Harald Freudenberger
This patch removes the old status calls which have been marked as deprecated since at least 2 years now. There is no known application or library relying on these ioctls any more. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-10s390/zcrypt: Make ap init functions static.Harald Freudenberger
The ap init functions ap_module_init and ap_debug_init are only used within ap_bus.c. Make these functions static and do not declare them in any header file any more. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-10s390: assume diag308 set always worksVasily Gorbik
diag308 set has been available for many machine generations, and alternative reipl code paths has not been exercised and seems to be broken without noticing for a while now. So, cleaning up all obsolete reipl methods except currently used ones, assuming that diag308 set always works. Also removing not longer needed reset callbacks. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-10s390/ipl: rely on diag308 store to get ipl infoVasily Gorbik
For both ccw and fcp boot retrieve ipl info from ipl block received via diag308 store. Old scsi ipl parm block handling and cio_get_iplinfo are removed. Ipl type is deducted from ipl block (if valid). Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-10s390/qdio: lock device while installing IRQ handlerJulian Wiedmann
During setup, qdio takes control of the presented ccw device and replaces the device's IRQ handler with its own. To avoid any interference with conccurent activity on the device, this should be done while holding the device's lock. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-10s390/qdio: clear intparm during shutdownJulian Wiedmann
During shutdown, qdio returns its ccw device back to control by the upper-layer driver. But there is a remote chance that by the time where the IRQ handler gets switched back, the interrupt for the preceding ccw_device_{clear,halt} hasn't been presented yet. Upper-layer drivers would then need to handle this IRQ - and since the IO is issued with an intparm, it could very well be confused with whatever intparm mechanism the driver uses itself (eg intparm == request address). So when switching over the IRQ handler, also clear the intparm and have upper-layer drivers deal with any such delayed interrupt as if it was unsolicited. Suggested-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-10s390/ccwgroup: require at least one ccw deviceJulian Wiedmann
ccwgroup_create_dev() derives the gdev's device name from gdev->cdev[0], so make sure that this reference is valid. For robustness only, all current ccwgroup drivers get this right. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Acked-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-10s390/zcrypt: remove unused functions and declarationsHarald Freudenberger
The AP bus code is not available as kernel module any more. There was some leftover code dealing with kernel module exit which has been removed with this patch. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-09platform/chrome: chromeos_laptop - factor out getting IRQ from DMIDmitry Torokhov
This will make code instantiating I2C device a bit clearer. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09platform/chrome: chromeos_laptop - introduce pr_fmt()Dmitry Torokhov
Define pr_fmt() to standardize driver messages. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09platform/chrome: chromeos_laptop - stop setting suspend mode for Atmel devicesDmitry Torokhov
Atmel touch controller driver no longer respects suspend mode specified in platform data, so let's stop setting it. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09platform/chrome: chromeos_laptop - add SPDX identifierDmitry Torokhov
Replace the original license statement with the SPDX identifier. Add also one line of description as recommended by the COPYING file. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09Input: atmel_mxt_ts - switch ChromeOS ACPI devices to generic propsDmitry Torokhov
Move older ChromeOS devices describing Atmel controllers in ACPI, but not providing enough details to configure the controllers properly, from platform data over to generic device properties. This will allow us remove support for platform data later on, leaving only generic device properties in place. Acked-by: Nick Dyer <nick@shmanahar.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09Input: atmel_mxt_ts - switch from OF to generic device propertiesDmitry Torokhov
Instead of using OF-specific APIs to fecth device properties, let's switch to generic device properties API. This will allow us to use device properties on legacy ChromeOS devices and get rid of platform data down the road. Acked-by: Nick Dyer <nick@shmanahar.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-09Input: atmel_mxt_ts - do not pass suspend mode in platform dataDmitry Torokhov
The way we are supposed to put controller to sleep and wake it up does not depend on the platform, but rather on controller itself, so we want to get rid of suspend mode in platform data (and eventually get rid of platform data completely). Unfortunately some early chromebooks (the original Pixel, Acer C720) were shipped with config that requires manually re-enabling touch reporting in T9. We will sort it out, but in the meantime let's switch to a simple DMI quirk. We'll keep pdata->suspend_mode for now and remove it when we rework chromeos-laptop driver. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
2018-04-10Merge branch 'topic/stm' into for-linusVinod Koul
2018-04-10Merge branch 'topic/renesas' into for-linusVinod Koul
2018-04-10Merge branch 'topic/qcom' into for-linusVinod Koul
2018-04-10Merge branch 'topic/pl330' into for-linusVinod Koul
2018-04-10Merge branch 'topic/mtek' into for-linusVinod Koul
2018-04-10Merge branch 'topic/imx' into for-linusVinod Koul
2018-04-10Merge branch 'topic/edma' into for-linusVinod Koul
2018-04-10Merge branch 'topic/dw_axi' into for-linusVinod Koul
2018-04-10Merge branch 'topic/dmatest' into for-linusVinod Koul
2018-04-09Merge tag 'hwmon-for-linus-v4.17' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging Pull hwmon updates from Guenter Roeck: - added chip support: new Centaur CPUs, ADM1272, NCT6796D - ucd9000: added debugfs attributes, gpio support - cleanup and minor bug fixes * tag 'hwmon-for-linus-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: hwmon: (via-cputemp) support new centaur CPUs hwmon: (nct6775) Fix writing pwmX_mode hwmon: (lm92) Add max6635 to lm92_id[] hwmon: (pmbus/adm1275) Add support for ADM1272 hwmon: (lm92) Do not try to detect MAX6635 hwmon: (ucd9000) Add debugfs attributes to provide mfr_status hwmon: (ucd9000) Add gpio chip interface hwmon: (nct6775) Add support for NCT6796D hwmon: (nct6775) Initialize boolean variables with declaration hwmon: (nct6775) Improve fan6/pwm6 support hwmon: (nct6775) Use NUM_FAN consistently hwmon: (g762) handle cleanup with devm_add_action hwmon: (sht3x) Update data sheet URL hwmon: (sht21) Update data sheet URLs hwmon: (pmbus/adm1275) Accept negative page register values hwmon: (pmbus/max8688) Accept negative page register values
2018-04-09Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: 1) The sockmap code has to free socket memory on close if there is corked data, from John Fastabend. 2) Tunnel names coming from userspace need to be length validated. From Eric Dumazet. 3) arp_filter() has to take VRFs properly into account, from Miguel Fadon Perlines. 4) Fix oops in error path of tcf_bpf_init(), from Davide Caratti. 5) Missing idr_remove() in u32_delete_key(), from Cong Wang. 6) More syzbot stuff. Several use of uninitialized value fixes all over, from Eric Dumazet. 7) Do not leak kernel memory to userspace in sctp, also from Eric Dumazet. 8) Discard frames from unused ports in DSA, from Andrew Lunn. 9) Fix DMA mapping and reset/failover problems in ibmvnic, from Thomas Falcon. 10) Do not access dp83640 PHY registers prematurely after reset, from Esben Haabendal. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (46 commits) vhost-net: set packet weight of tx polling to 2 * vq size net: thunderx: rework mac addresses list to u64 array inetpeer: fix uninit-value in inet_getpeer dp83640: Ensure against premature access to PHY registers after reset devlink: convert occ_get op to separate registration ARM: dts: ls1021a: Specify TBIPA register address net/fsl_pq_mdio: Allow explicit speficition of TBIPA address ibmvnic: Do not reset CRQ for Mobility driver resets ibmvnic: Fix failover case for non-redundant configuration ibmvnic: Fix reset scheduler error handling ibmvnic: Zero used TX descriptor counter on reset ibmvnic: Fix DMA mapping mistakes tipc: use the right skb in tipc_sk_fill_sock_diag() sctp: sctp_sockaddr_af must check minimal addr length for AF_INET6 net: dsa: Discard frames from unused ports sctp: do not leak kernel memory to user space soreuseport: initialise timewait reuseport field ipv4: fix uninit-value in ip_route_output_key_hash_rcu() dccp: initialize ireq->ir_mark net: fix uninit-value in __hw_addr_add_ex() ...
2018-04-09Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull kvm updates from Paolo Bonzini: "ARM: - VHE optimizations - EL2 address space randomization - speculative execution mitigations ("variant 3a", aka execution past invalid privilege register access) - bugfixes and cleanups PPC: - improvements for the radix page fault handler for HV KVM on POWER9 s390: - more kvm stat counters - virtio gpu plumbing - documentation - facilities improvements x86: - support for VMware magic I/O port and pseudo-PMCs - AMD pause loop exiting - support for AMD core performance extensions - support for synchronous register access - expose nVMX capabilities to userspace - support for Hyper-V signaling via eventfd - use Enlightened VMCS when running on Hyper-V - allow userspace to disable MWAIT/HLT/PAUSE vmexits - usual roundup of optimizations and nested virtualization bugfixes Generic: - API selftest infrastructure (though the only tests are for x86 as of now)" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (174 commits) kvm: x86: fix a prototype warning kvm: selftests: add sync_regs_test kvm: selftests: add API testing infrastructure kvm: x86: fix a compile warning KVM: X86: Add Force Emulation Prefix for "emulate the next instruction" KVM: X86: Introduce handle_ud() KVM: vmx: unify adjacent #ifdefs x86: kvm: hide the unused 'cpu' variable KVM: VMX: remove bogus WARN_ON in handle_ept_misconfig Revert "KVM: X86: Fix SMRAM accessing even if VM is shutdown" kvm: Add emulation for movups/movupd KVM: VMX: raise internal error for exception during invalid protected mode state KVM: nVMX: Optimization: Dont set KVM_REQ_EVENT when VMExit with nested_run_pending KVM: nVMX: Require immediate-exit when event reinjected to L2 and L1 event pending KVM: x86: Fix misleading comments on handling pending exceptions KVM: x86: Rename interrupt.pending to interrupt.injected KVM: VMX: No need to clear pending NMI/interrupt on inject realmode interrupt x86/kvm: use Enlightened VMCS when running on Hyper-V x86/hyper-v: detect nested features x86/hyper-v: define struct hv_enlightened_vmcs and clean field bits ...
2018-04-09Merge branch 'for-4.17/dax' into libnvdimm-for-nextDan Williams
2018-04-09Merge branch 'for-4.17/libnvdimm' into libnvdimm-for-nextDan Williams
2018-04-09Merge branch 'for-linus-sa1100' of git://git.armlinux.org.uk/~rmk/linux-armLinus Torvalds
Pull ARM SA1100 updates from Russell King: "We have support for arbitary MMIO registers providing platform GPIOs, which allows us to abstract some of the SA11x0 CF support. This set of updates makes that change" * 'for-linus-sa1100' of git://git.armlinux.org.uk/~rmk/linux-arm: ARM: sa1100/simpad: switch simpad CF to use gpiod APIs ARM: sa1100/shannon: convert to generic CF sockets ARM: sa1100/nanoengine: convert to generic CF sockets ARM: sa1100/h3xxx: switch h3xxx PCMCIA to use gpiod APIs ARM: sa1100/cerf: convert to generic CF sockets ARM: sa1100/assabet: convert to generic CF sockets ARM: sa1100: provide infrastructure to support generic CF sockets pcmcia: sa1100: provide generic CF support
2018-04-09libnvdimm, of_pmem: workaround OF_NUMA=n build errorDan Williams
Stephen reports that an x86 allmodconfig build fails to build the of_pmem driver due to a missing definition of of_node_to_nid(). That helper is currently only exported in the OF_NUMA=y case. In other cases, ppc and sparc, it is a weak symbol, and outside of those platforms it is a static inline. Until an OF_NUMA=n configuration can reliably support usage of of_node_to_nid() in modules across architectures, mark this driver as 'bool' instead of 'tristate'. Cc: Rob Herring <robh@kernel.org> Cc: Oliver O'Halloran <oohall@gmail.com> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2018-04-09Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Martin Schwidefsky: - Improvements for the spectre defense: * The spectre related code is consolidated to a single file nospec-branch.c * Automatic enable/disable for the spectre v2 defenses (expoline vs. nobp) * Syslog messages for specve v2 are added * Enable CONFIG_GENERIC_CPU_VULNERABILITIES and define the attribute functions for spectre v1 and v2 - Add helper macros for assembler alternatives and use them to shorten the code in entry.S. - Add support for persistent configuration data via the SCLP Store Data interface. The H/W interface requires a page table that uses 4K pages only, the code to setup such an address space is added as well. - Enable virtio GPU emulation in QEMU. To do this the depends statements for a few common Kconfig options are modified. - Add support for format-3 channel path descriptors and add a binary sysfs interface to export the associated utility strings. - Add a sysfs attribute to control the IFCC handling in case of constant channel errors. - The vfio-ccw changes from Cornelia. - Bug fixes and cleanups. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (40 commits) s390/kvm: improve stack frame constants in entry.S s390/lpp: use assembler alternatives for the LPP instruction s390/entry.S: use assembler alternatives s390: add assembler macros for CPU alternatives s390: add sysfs attributes for spectre s390: report spectre mitigation via syslog s390: add automatic detection of the spectre defense s390: move nobp parameter functions to nospec-branch.c s390/cio: add util_string sysfs attribute s390/chsc: query utility strings via fmt3 channel path descriptor s390/cio: rename struct channel_path_desc s390/cio: fix unbind of io_subchannel_driver s390/qdio: split up CCQ handling for EQBS / SQBS s390/qdio: don't retry EQBS after CCQ 96 s390/qdio: restrict buffer merging to eligible devices s390/qdio: don't merge ERROR output buffers s390/qdio: simplify math in get_*_buffer_frontier() s390/decompressor: trim uncompressed image head during the build s390/crypto: Fix kernel crash on aes_s390 module remove. s390/defkeymap: fix global init to zero ...
2018-04-09vhost-net: set packet weight of tx polling to 2 * vq sizehaibinzhang(张海斌)
handle_tx will delay rx for tens or even hundreds of milliseconds when tx busy polling udp packets with small length(e.g. 1byte udp payload), because setting VHOST_NET_WEIGHT takes into account only sent-bytes but no single packet length. Ping-Latencies shown below were tested between two Virtual Machines using netperf (UDP_STREAM, len=1), and then another machine pinged the client: vq size=256 Packet-Weight Ping-Latencies(millisecond) min avg max Origin 3.319 18.489 57.303 64 1.643 2.021 2.552 128 1.825 2.600 3.224 256 1.997 2.710 4.295 512 1.860 3.171 4.631 1024 2.002 4.173 9.056 2048 2.257 5.650 9.688 4096 2.093 8.508 15.943 vq size=512 Packet-Weight Ping-Latencies(millisecond) min avg max Origin 6.537 29.177 66.245 64 2.798 3.614 4.403 128 2.861 3.820 4.775 256 3.008 4.018 4.807 512 3.254 4.523 5.824 1024 3.079 5.335 7.747 2048 3.944 8.201 12.762 4096 4.158 11.057 19.985 Seems pretty consistent, a small dip at 2 VQ sizes. Ring size is a hint from device about a burst size it can tolerate. Based on benchmarks, set the weight to 2 * vq size. To evaluate this change, another tests were done using netperf(RR, TX) between two machines with Intel(R) Xeon(R) Gold 6133 CPU @ 2.50GHz, and vq size was tweaked through qemu. Results shown below does not show obvious changes. vq size=256 TCP_RR vq size=512 TCP_RR size/sessions/+thu%/+normalize% size/sessions/+thu%/+normalize% 1/ 1/ -7%/ -2% 1/ 1/ 0%/ -2% 1/ 4/ +1%/ 0% 1/ 4/ +1%/ 0% 1/ 8/ +1%/ -2% 1/ 8/ 0%/ +1% 64/ 1/ -6%/ 0% 64/ 1/ +7%/ +3% 64/ 4/ 0%/ +2% 64/ 4/ -1%/ +1% 64/ 8/ 0%/ 0% 64/ 8/ -1%/ -2% 256/ 1/ -3%/ -4% 256/ 1/ -4%/ -2% 256/ 4/ +3%/ +4% 256/ 4/ +1%/ +2% 256/ 8/ +2%/ 0% 256/ 8/ +1%/ -1% vq size=256 UDP_RR vq size=512 UDP_RR size/sessions/+thu%/+normalize% size/sessions/+thu%/+normalize% 1/ 1/ -5%/ +1% 1/ 1/ -3%/ -2% 1/ 4/ +4%/ +1% 1/ 4/ -2%/ +2% 1/ 8/ -1%/ -1% 1/ 8/ -1%/ 0% 64/ 1/ -2%/ -3% 64/ 1/ +1%/ +1% 64/ 4/ -5%/ -1% 64/ 4/ +2%/ 0% 64/ 8/ 0%/ -1% 64/ 8/ -2%/ +1% 256/ 1/ +7%/ +1% 256/ 1/ -7%/ 0% 256/ 4/ +1%/ +1% 256/ 4/ -3%/ -4% 256/ 8/ +2%/ +2% 256/ 8/ +1%/ +1% vq size=256 TCP_STREAM vq size=512 TCP_STREAM size/sessions/+thu%/+normalize% size/sessions/+thu%/+normalize% 64/ 1/ 0%/ -3% 64/ 1/ 0%/ 0% 64/ 4/ +3%/ -1% 64/ 4/ -2%/ +4% 64/ 8/ +9%/ -4% 64/ 8/ -1%/ +2% 256/ 1/ +1%/ -4% 256/ 1/ +1%/ +1% 256/ 4/ -1%/ -1% 256/ 4/ -3%/ 0% 256/ 8/ +7%/ +5% 256/ 8/ -3%/ 0% 512/ 1/ +1%/ 0% 512/ 1/ -1%/ -1% 512/ 4/ +1%/ -1% 512/ 4/ 0%/ 0% 512/ 8/ +7%/ -5% 512/ 8/ +6%/ -1% 1024/ 1/ 0%/ -1% 1024/ 1/ 0%/ +1% 1024/ 4/ +3%/ 0% 1024/ 4/ +1%/ 0% 1024/ 8/ +8%/ +5% 1024/ 8/ -1%/ 0% 2048/ 1/ +2%/ +2% 2048/ 1/ -1%/ 0% 2048/ 4/ +1%/ 0% 2048/ 4/ 0%/ -1% 2048/ 8/ -2%/ 0% 2048/ 8/ 5%/ -1% 4096/ 1/ -2%/ 0% 4096/ 1/ -2%/ 0% 4096/ 4/ +2%/ 0% 4096/ 4/ 0%/ 0% 4096/ 8/ +9%/ -2% 4096/ 8/ -5%/ -1% Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Haibin Zhang <haibinzhang@tencent.com> Signed-off-by: Yunfang Tai <yunfangtai@tencent.com> Signed-off-by: Lidong Chen <lidongchen@tencent.com> Signed-off-by: David S. Miller <davem@davemloft.net>