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2018-05-18Merge tag 'acpi-4.17-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI fix from Rafael Wysocki: "Fix an ACPICA regression introduced in this cycle and related to the handling of package objects loaded by the Load and loadTable AML operators that are not initialized properly after recent changes (Bob Moore)" * tag 'acpi-4.17-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPICA: Add deferred package support for the Load and loadTable operators
2018-05-18Merge branch 'net-smc-cleanups'David S. Miller
Ursula Braun says: ==================== net/smc: cleanups 2018-05-18 here are SMC patches for net-next providing restructuring and cleanup in different areas. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18net/smc: restructure client and server code in af_smcHans Wippel
This patch splits up the functions smc_connect_rdma and smc_listen_work into smaller functions. Signed-off-by: Hans Wippel <hwippel@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18net/smc: change smc_buf_free function parametersHans Wippel
This patch changes the function smc_buf_free to use the SMC link group instead of the link as function parameter. Also, it changes the order of the other two parameters. Signed-off-by: Hans Wippel <hwippel@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18net/smc: do a few smc_core.c cleanupsHans Wippel
This patch consists of Christmas tree fixes and removal of an unneeded function parameter. Signed-off-by: Hans Wippel <hwippel@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18net/smc: restructure CDC message receptionHans Wippel
This patch moves a CDC sanity check from smc_cdc_msg_recv_action() to the other sanity checks in smc_cdc_rx_handler(). While doing this, it simplifies smc_cdc_msg_recv() and removes unneeded function parameters. Signed-off-by: Hans Wippel <hwippel@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18net/smc: move smc_core specific code from smc.h to smc_coreHans Wippel
SMC connection and buffer handling belong to smc_core. So, this patch moves this code from smc.h to smc_core. Signed-off-by: Hans Wippel <hwippel@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18net/smc: calculate write offset in RMB only once per connectionHans Wippel
Currently, the write offset within the RMB is calculated on each write operation although it is fixed for each connection. With this patch, the offset is calculated once and stored in a connection specific variable. Signed-off-by: Hans Wippel <hwippel@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18net/smc: rename connection index to RMBE indexHans Wippel
The connection index is actually a RMBE index. So, this patch changes the name accordingly. Signed-off-by: Hans Wippel <hwippel@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18net/smc: move link group list to smc_coreHans Wippel
This patch moves the global link group list to smc_core where the link group functions are. To make this work, it moves code in af_smc and smc_ib that operates on the link group list to smc_core as well. While at it, the link group counter is integrated into the list structure and initialized to zero. Signed-off-by: Hans Wippel <hwippel@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18net/smc: add common buffer size in send and receive buffer descriptorsHans Wippel
In addition to the buffer references, SMC currently stores the sizes of the receive and send buffers in each connection as separate variables. This patch introduces a buffer length variable in the common buffer descriptor and uses this length instead. Signed-off-by: Hans Wippel <hwippel@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18Merge tag 'pm-4.17-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management fix from Rafael Wysocki: "Fix Kconfig dependencies of the armada-37xx cpufreq driver (Miquel Raynal)" * tag 'pm-4.17-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: cpufreq: armada-37xx: driver relies on cpufreq-dt
2018-05-18Merge tag 'usb-4.17-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB fixes from Greg KH: "Here are some USB driver fixes fro 4.17-rc6. They resolve some reported bugs in the musb driver, the xhci driver, and a number of small fixes for the usbip driver. All of these have been in linux-next with no reported issues" * tag 'usb-4.17-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: usbip: usbip_host: fix bad unlock balance during stub_probe() usbip: usbip_host: fix NULL-ptr deref and use-after-free errors usbip: usbip_host: run rebind from exit when module is removed usbip: usbip_host: delete device from busid_table after rebind usbip: usbip_host: refine probe and disconnect debug msgs to be useful usb: musb: fix remote wakeup racing with suspend xhci: Fix USB3 NULL pointer dereference at logical disconnect.
2018-05-18Merge tag 'for-linus-20180518' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull block fix from Jens Axboe: "Single fix this time, from Coly, fixing a failure case when CONFIG_DEBUGFS isn't enabled" * tag 'for-linus-20180518' of git://git.kernel.dk/linux-block: bcache: return 0 from bch_debug_init() if CONFIG_DEBUG_FS=n
2018-05-18Merge tag 'spi-fix-v4.17-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Pull spi fixes from Mark Brown: "A small collection of fixes accumilated since the merge window, all fairly small and driver specific" * tag 'spi-fix-v4.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: spi: bcm2835aux: ensure interrupts are enabled for shared handler spi: bcm-qspi: Always read and set BSPI_MAST_N_BOOT_CTRL spi: bcm-qspi: Avoid setting MSPI_CDRAM_PCS for spi-nor master spi: pxa2xx: Allow 64-bit DMA spi: cadence: Add usleep_range() for cdns_spi_fill_tx_fifo() spi: sh-msiof: Fix bit field overflow writes to TSCR/RSCR spi: imx: Update MODULE_DESCRIPTION to "SPI Controller driver"
2018-05-18Merge tag 'mlx5e-updates-2018-05-17' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux Saeed Mahameed says: ==================== mlx5e-updates-2018-05-17 From: Or Gerlitz <ogerlitz@mellanox.com> This series addresses a regression introduced by the shared block TC changes [1]. Currently, for VF->VF and uplink->VF rules, the TC core (cls_api) attempts to offload the same flow multiple times into the driver, as a side effect of the mlx5 registration to the egdev callback. We use the flow cookie to ignore attempts to add such flows, we can't reject them (return error), b/c this will fail the offload attempt, so we ignore that. The last patch of the series deals with exposing HW stats counters through ethtool for the vport reps. Dave - the regression that we are addressing was introduced in 4.15 [1] and applies to nfp and mlx5. Jiri suggested to push driver side fixes to net-next, this is already done for nfp [2][3]. Once this is upstream, we will submit a small/point single patch fix for the TC core code which can serve for net and stable, but not carried into net-next, b/c it might limit some future use-cases. [1] 208c0f4b5237 "net: sched: use tc_setup_cb_call to call per-block callbacks" [2] c50647d "nfp: flower: ignore duplicate cb requests for same rule" [3] 54a4a03 "nfp: flower: support offloading multiple rules with same cookie" ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18Merge tag 'mlx5-updates-2018-05-17' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux Saeed Mahameed says: ==================== mlx5-updates-2018-05-17 mlx5 core dirver updates for both net-next and rdma-next branches. From Christophe JAILLET, first three patche to use kvfree where needed. From: Or Gerlitz <ogerlitz@mellanox.com> Next six patches from Roi and Co adds support for merged sriov e-switch which comes to serve cases where both PFs, VFs set on them and both uplinks are to be used in single v-switch SW model. When merged e-switch is supported, the per-port e-switch is logically merged into one e-switch that spans both physical ports and all the VFs. This model allows to offload TC eswitch rules between VFs belonging to different PFs (and hence have different eswitch affinity), it also sets the some of the foundations needed for uplink LAG support. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18Merge tag 'mtd/fixes-for-4.17-rc6' of git://git.infradead.org/linux-mtdLinus Torvalds
Pull mtd fixes from Boris Brezillon: "NAND fixes: - Fix read path of the Marvell NAND driver - Make sure we don't pass a u64 to ndelay() CFI fix: - Fix the map_word_andequal() implementation" * tag 'mtd/fixes-for-4.17-rc6' of git://git.infradead.org/linux-mtd: mtd: rawnand: Fix return type of __DIVIDE() when called with 32-bit mtd: rawnand: marvell: Fix read logic for layouts with ->nchunks > 2 mtd: Fix comparison in map_word_andequal()
2018-05-18ASoC: pcm512x: Add ACPI supportPierre-Louis Bossart
HID is assumed to be made of TI PCI ID (0x104C) + part number, so all four 104C5121, 104C5122, 104C5141 104C5142 are valid. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-05-18Merge tag 'drm-fixes-for-v4.17-rc6' of ↵Linus Torvalds
git://people.freedesktop.org/~airlied/linux Pull drm fixes from Dave Airlie: "Pretty quiet week again: one vmwgfx regression fix, one core buffer overflow fix, one vc4 leak fix and three i915 fixes" * tag 'drm-fixes-for-v4.17-rc6' of git://people.freedesktop.org/~airlied/linux: drm/dumb-buffers: Integer overflow in drm_mode_create_ioctl() drm/i915/gen9: Add WaClearHIZ_WM_CHICKEN3 for bxt and glk drm/vmwgfx: Set dmabuf_size when vmw_dmabuf_init is successful drm/vc4: Fix leak of the file_priv that stored the perfmon. drm/i915/execlists: Use rmb() to order CSB reads drm/i915/userptr: reject zero user_size drm: Match sysfs name in link removal to link creation
2018-05-19crypto: x86 - Add optimized MORUS implementationsOndrej Mosnacek
This patch adds optimized implementations of MORUS-640 and MORUS-1280, utilizing the SSE2 and AVX2 x86 extensions. For MORUS-1280 (which operates on 256-bit blocks) we provide both AVX2 and SSE2 implementation. Although SSE2 MORUS-1280 is slower than AVX2 MORUS-1280, it is comparable in speed to the SSE2 MORUS-640. Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-05-19crypto: morus - Add common SIMD glue code for MORUSOndrej Mosnacek
This patch adds a common glue code for optimized implementations of MORUS AEAD algorithms. Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-05-19crypto: testmgr - Add test vectors for MORUSOndrej Mosnacek
This patch adds test vectors for MORUS-640 and MORUS-1280. The test vectors were generated using the reference implementation from SUPERCOP (see code comments for more details). Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-05-19crypto: morus - Add generic MORUS AEAD implementationsOndrej Mosnacek
This patch adds the generic implementation of the MORUS family of AEAD algorithms (MORUS-640 and MORUS-1280). The original authors of MORUS are Hongjun Wu and Tao Huang. At the time of writing, MORUS is one of the finalists in CAESAR, an open competition intended to select a portfolio of alternatives to the problematic AES-GCM: https://competitions.cr.yp.to/caesar-submissions.html https://competitions.cr.yp.to/round3/morusv2.pdf Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-05-19crypto: x86 - Add optimized AEGIS implementationsOndrej Mosnacek
This patch adds optimized implementations of AEGIS-128, AEGIS-128L, and AEGIS-256, utilizing the AES-NI and SSE2 x86 extensions. Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-05-19crypto: testmgr - Add test vectors for AEGISOndrej Mosnacek
This patch adds test vectors for the AEGIS family of AEAD algorithms (AEGIS-128, AEGIS-128L, and AEGIS-256). The test vectors were generated using the reference implementation from SUPERCOP (see code comments for more details). Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-05-19crypto: aegis - Add generic AEGIS AEAD implementationsOndrej Mosnacek
This patch adds the generic implementation of the AEGIS family of AEAD algorithms (AEGIS-128, AEGIS-128L, and AEGIS-256). The original authors of AEGIS are Hongjun Wu and Bart Preneel. At the time of writing, AEGIS is one of the finalists in CAESAR, an open competition intended to select a portfolio of alternatives to the problematic AES-GCM: https://competitions.cr.yp.to/caesar-submissions.html https://competitions.cr.yp.to/round3/aegisv11.pdf Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-05-19crypto: testmgr - reorder paes test lexicographicallyGilad Ben-Yossef
Due to a snafu "paes" testmgr tests were not ordered lexicographically, which led to boot time warnings. Reorder the tests as needed. Fixes: a794d8d ("crypto: ccree - enable support for hardware keys") Reported-by: Abdul Haleem <abdhalee@linux.vnet.ibm.com> Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Tested-by: Abdul Haleem <abdhalee@linux.vnet.ibm.com> Tested-by: Corentin Labbe <clabbe.montjoie@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-05-19crypto: chelsio - request to HW should wrapAtul Gupta
-Tx request and data is copied to HW Q in 64B desc, check for end of queue and adjust the current position to start from beginning before passing the additional request info. -key context copy should check key length only -Few reverse christmas tree correction Signed-off-by: Atul Gupta <atul.gupta@chelsio.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-05-19crypto: nx - fix spelling mistake: "seqeunce" -> "sequence"Colin Ian King
Trivial fix to spelling mistake in CSB_ERR error message text Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-05-19hwrng: n2 - fix spelling mistake: "restesting" -> "retesting"Colin Ian King
Trivial fix to spelling mistake in dev_err error message Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-05-18net: dsa: Do not register devlink for unused portsFlorian Fainelli
Even if commit 1d27732f411d ("net: dsa: setup and teardown ports") indicated that registering a devlink instance for unused ports is not a problem, and this is true, this can be confusing nonetheless, so let's not do it. Fixes: 1d27732f411d ("net: dsa: setup and teardown ports") Reported-by: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18net: Fix a bug in removing queues from XPS mapAmritha Nambiar
While removing queues from the XPS map, the individual CPU ID alone was used to index the CPUs map, this should be changed to also factor in the traffic class mapping for the CPU-to-queue lookup. Fixes: 184c449f91fe ("net: Add support for XPS with QoS via traffic classes") Signed-off-by: Amritha Nambiar <amritha.nambiar@intel.com> Acked-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18ASoC: rt5677: Convert I2C driver to ->probe_new()Andy Shevchenko
There is no platform code that uses i2c module table. Remove it altogether and adjust ->probe() to be ->probe_new(). Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-05-18workqueue: Show the latest workqueue name in /proc/PID/{comm,stat,status}Tejun Heo
There can be a lot of workqueue workers and they all show up with the cryptic kworker/* names making it difficult to understand which is doing what and how they came to be. # ps -ef | grep kworker root 4 2 0 Feb25 ? 00:00:00 [kworker/0:0H] root 6 2 0 Feb25 ? 00:00:00 [kworker/u112:0] root 19 2 0 Feb25 ? 00:00:00 [kworker/1:0H] root 25 2 0 Feb25 ? 00:00:00 [kworker/2:0H] root 31 2 0 Feb25 ? 00:00:00 [kworker/3:0H] ... This patch makes workqueue workers report the latest workqueue it was executing for through /proc/PID/{comm,stat,status}. The extra information is appended to the kthread name with intervening '+' if currently executing, otherwise '-'. # cat /proc/25/comm kworker/2:0-events_power_efficient # cat /proc/25/stat 25 (kworker/2:0-events_power_efficient) I 2 0 0 0 -1 69238880 0 0... # grep Name /proc/25/status Name: kworker/2:0-events_power_efficient Unfortunately, ps(1) truncates comm to 15 characters, # ps 25 PID TTY STAT TIME COMMAND 25 ? I 0:00 [kworker/2:0-eve] making it a lot less useful; however, this should be an easy fix from ps(1) side. Signed-off-by: Tejun Heo <tj@kernel.org> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Craig Small <csmall@enc.com.au>
2018-05-18proc: Consolidate task->comm formatting into proc_task_name()Tejun Heo
proc shows task->comm in three places - comm, stat, status - and each is fetching and formatting task->comm slighly differently. This patch renames task_name() to proc_task_name(), makes it more generic, and updates all three paths to use it. This will enable expanding comm reporting for workqueue workers. Signed-off-by: Tejun Heo <tj@kernel.org>
2018-05-18workqueue: Set worker->desc to workqueue name by defaultTejun Heo
Work functions can use set_worker_desc() to improve the visibility of what the worker task is doing. Currently, the desc field is unset at the beginning of each execution and there is a separate field to track the field is set during the current execution. Instead of leaving empty till desc is set, worker->desc can be used to remember the last workqueue the worker worked on by default and users that use set_worker_desc() can override it to something more informative as necessary. This simplifies desc handling and helps tracking the last workqueue that the worker exected on to improve visibility. Signed-off-by: Tejun Heo <tj@kernel.org>
2018-05-18workqueue: Make worker_attach/detach_pool() update worker->poolTejun Heo
For historical reasons, the worker attach/detach functions don't currently manage worker->pool and the callers are manually and inconsistently updating it. This patch moves worker->pool updates into the worker attach/detach functions. This makes worker->pool consistent and clearly defines how worker->pool updates are synchronized. This will help later workqueue visibility improvements by allowing safe access to workqueue information from worker->task. Signed-off-by: Tejun Heo <tj@kernel.org>
2018-05-18workqueue: Replace pool->attach_mutex with global wq_pool_attach_mutexTejun Heo
To improve workqueue visibility, we want to be able to access workqueue information from worker tasks. The per-pool attach mutex makes that difficult because there's no way of stabilizing task -> worker pool association without knowing the pool first. Worker attach/detach is a slow path and there's no need for different pools to be able to perform them concurrently. This patch replaces the per-pool attach_mutex with global wq_pool_attach_mutex to prepare for visibility improvement changes. Signed-off-by: Tejun Heo <tj@kernel.org>
2018-05-18PCI: endpoint: Create configfs entry for each pci_epf_device_id table entryKishon Vijay Abraham I
In order to be able to provide correct driver_data for pci_epf device, a separate configfs entry for each pci_epf_device_id table entry in pci_epf_driver is required. Add support to create configfs entry for each pci_epf_device_id table entry here. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Tested-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
2018-05-18Merge branch 'tcp-implement-SACK-compression'David S. Miller
Eric Dumazet says: ==================== tcp: implement SACK compression When TCP receives an out-of-order packet, it immediately sends a SACK packet, generating network load but also forcing the receiver to send 1-MSS pathological packets, increasing its RTX queue length/depth, and thus processing time. Wifi networks suffer from this aggressive behavior, but generally speaking, all these SACK packets add fuel to the fire when networks are under congestion. This patch series adds SACK compression, but the infrastructure could be leveraged to also compress ACK in the future. v2: Addressed Neal feedback. Added two sysctls to allow fine tuning, or even disabling the feature. v3: take rtt = min(srtt, rcv_rtt) as Yuchung suggested, because rcv_rtt can be over estimated for RPC (or sender limited) ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18tcp: add tcp_comp_sack_nr sysctlEric Dumazet
This per netns sysctl allows for TCP SACK compression fine-tuning. This limits number of SACK that can be compressed. Using 0 disables SACK compression. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18tcp: add tcp_comp_sack_delay_ns sysctlEric Dumazet
This per netns sysctl allows for TCP SACK compression fine-tuning. Its default value is 1,000,000, or 1 ms to meet TSO autosizing period. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18tcp: add TCPAckCompressed SNMP counterEric Dumazet
This counter tracks number of ACK packets that the host has not sent, thanks to ACK compression. Sample output : $ nstat -n;sleep 1;nstat|egrep "IpInReceives|IpOutRequests|TcpInSegs|TcpOutSegs|TcpExtTCPAckCompressed" IpInReceives 123250 0.0 IpOutRequests 3684 0.0 TcpInSegs 123251 0.0 TcpOutSegs 3684 0.0 TcpExtTCPAckCompressed 119252 0.0 Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18tcp: add SACK compressionEric Dumazet
When TCP receives an out-of-order packet, it immediately sends a SACK packet, generating network load but also forcing the receiver to send 1-MSS pathological packets, increasing its RTX queue length/depth, and thus processing time. Wifi networks suffer from this aggressive behavior, but generally speaking, all these SACK packets add fuel to the fire when networks are under congestion. This patch adds a high resolution timer and tp->compressed_ack counter. Instead of sending a SACK, we program this timer with a small delay, based on RTT and capped to 1 ms : delay = min ( 5 % of RTT, 1 ms) If subsequent SACKs need to be sent while the timer has not yet expired, we simply increment tp->compressed_ack. When timer expires, a SACK is sent with the latest information. Whenever an ACK is sent (if data is sent, or if in-order data is received) timer is canceled. Note that tcp_sack_new_ofo_skb() is able to force a SACK to be sent if the sack blocks need to be shuffled, even if the timer has not expired. A new SNMP counter is added in the following patch. Two other patches add sysctls to allow changing the 1,000,000 and 44 values that this commit hard-coded. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Acked-by: Yuchung Cheng <ycheng@google.com> Acked-by: Toke Høiland-Jørgensen <toke@toke.dk> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18tcp: do not force quickack when receiving out-of-order packetsEric Dumazet
As explained in commit 9f9843a751d0 ("tcp: properly handle stretch acks in slow start"), TCP stacks have to consider how many packets are acknowledged in one single ACK, because of GRO, but also because of ACK compression or losses. We plan to add SACK compression in the following patch, we must therefore not call tcp_enter_quickack_mode() Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18tcp: use __sock_put() instead of sock_put() in tcp_clear_xmit_timers()Eric Dumazet
Socket can not disappear under us. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18net: mscc: Add SPDX identifierAlexandre Belloni
ocelot_qsys.h is missing the SPDX identfier, fix that. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Reviewed-by: Allan W. Nielsen <allan.nielsen@microsemi.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18Merge branch 'stmmac-Clean-up-and-tune-up'David S. Miller
Jose Abreu says: ==================== net: stmmac: Clean-up and tune-up This targets to uniformize the handling of the different GMAC versions in stmmac_main.c file and also tune-up the HW. Currently there are some if/else conditions in the main source file which calls different callbacks depending on the ID of GMAC. With the introducion of a generic HW interface handling which automatically selects the GMAC callbacks to be used, it is now unpleasant to see if conditions in the main code because this should be completely agnostic of the GMAC version. This series removes most of these conditions. There are some if conditions that remain untouched but the callbacks handling are now uniformized. Tested in GMAC5, hope I didn't break any previous versions. Please check [1] for performance analisys of patches 3-12. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-18net: stmmac: Remove if condition by taking advantage of hwif return codeJose Abreu
We can remove the if condition and check if return code is different than -EINVAL, meaning callback is present. Signed-off-by: Jose Abreu <joabreu@synopsys.com> Cc: David S. Miller <davem@davemloft.net> Cc: Joao Pinto <jpinto@synopsys.com> Cc: Vitor Soares <soares@synopsys.com> Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com> Cc: Alexandre Torgue <alexandre.torgue@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>