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  1. 20 3月, 2018 1 次提交
    • B
      net/mlx5: Packet pacing enhancement · 05d3ac97
      由 Bodong Wang 提交于 
      Add two new parameters: max_burst_sz and typical_pkt_size (both
in bytes) to rate limit configurations.

max_burst_sz: The device will schedule bursts of packets for an
SQ connected to this rate, smaller than or equal to this value.
Value 0x0 indicates packet bursts will be limited to the device
defaults. This field should be used if bursts of packets must be
strictly kept under a certain value.

typical_pkt_size: When the rate limit is intended for a stream of
similar packets, stating the typical packet size can improve the
accuracy of the rate limiter. The expected packet size will be
the same for all SQs associated with the same rate limit index.

Ethernet driver is updated according to this change, but these two
parameters will be kept as 0 due to lacking of proper way to get the
configurations from user space which requires to change
ndo_set_tx_maxrate interface.
Signed-off-by: NBodong Wang <bodong@mellanox.com>
Reviewed-by: NDaniel Jurgens <danielj@mellanox.com>
Reviewed-by: NYishai Hadas <yishaih@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>
      05d3ac97
  3. 16 3月, 2018 1 次提交
  5. 15 3月, 2018 1 次提交
  7. 14 3月, 2018 1 次提交
  9. 08 3月, 2018 8 次提交
  11. 07 3月, 2018 3 次提交
  13. 24 2月, 2018 2 次提交
  15. 15 2月, 2018 5 次提交
    • Y
      IB/mlx5: Implement fragmented completion queue (CQ) · 388ca8be
      由 Yonatan Cohen 提交于 
      The current implementation of create CQ requires contiguous
memory, such requirement is problematic once the memory is
fragmented or the system is low in memory, it causes for
failures in dma_zalloc_coherent().

This patch implements new scheme of fragmented CQ to overcome
this issue by introducing new type: 'struct mlx5_frag_buf_ctrl'
to allocate fragmented buffers, rather than contiguous ones.

Base the Completion Queues (CQs) on this new fragmented buffer.

It fixes following crashes:
kworker/29:0: page allocation failure: order:6, mode:0x80d0
CPU: 29 PID: 8374 Comm: kworker/29:0 Tainted: G OE 3.10.0
Workqueue: ib_cm cm_work_handler [ib_cm]
Call Trace:
[<>] dump_stack+0x19/0x1b
[<>] warn_alloc_failed+0x110/0x180
[<>] __alloc_pages_slowpath+0x6b7/0x725
[<>] __alloc_pages_nodemask+0x405/0x420
[<>] dma_generic_alloc_coherent+0x8f/0x140
[<>] x86_swiotlb_alloc_coherent+0x21/0x50
[<>] mlx5_dma_zalloc_coherent_node+0xad/0x110 [mlx5_core]
[<>] ? mlx5_db_alloc_node+0x69/0x1b0 [mlx5_core]
[<>] mlx5_buf_alloc_node+0x3e/0xa0 [mlx5_core]
[<>] mlx5_buf_alloc+0x14/0x20 [mlx5_core]
[<>] create_cq_kernel+0x90/0x1f0 [mlx5_ib]
[<>] mlx5_ib_create_cq+0x3b0/0x4e0 [mlx5_ib]
Signed-off-by: NYonatan Cohen <yonatanc@mellanox.com>
Reviewed-by: NTariq Toukan <tariqt@mellanox.com>
Signed-off-by: NLeon Romanovsky <leon@kernel.org>
Signed-off-by: NSaeed Mahameed <saeedm@mellanox.com>
      388ca8be
    • S
      net/mlx5: Remove redundant EQ API exports · 3ec5693b
      由 Saeed Mahameed 提交于 
      EQ structure and API is private to mlx5_core driver only, external
drivers should not have access or the means to manipulate EQ objects.

Remove redundant exports and move API functions out of the linux/mlx5
include directory into the driver's mlx5_core.h private include file.
Signed-off-by: NSaeed Mahameed <saeedm@mellanox.com>
Reviewed-by: NGal Pressman <galp@mellanox.com>
      3ec5693b
    • S
      net/mlx5: Move CQ completion and event forwarding logic to eq.c · 3ac7afdb
      由 Saeed Mahameed 提交于 
      Since CQ tree is now per EQ, CQ completion and event forwarding became
specific implementation of EQ logic, this patch moves that logic to eq.c
and makes those functions static.
Signed-off-by: NSaeed Mahameed <saeedm@mellanox.com>
Reviewed-by: NGal Pressman <galp@mellanox.com>
      3ac7afdb
    • S
      net/mlx5: CQ hold/put API · f105b45b
      由 Saeed Mahameed 提交于 
      Now as the CQ table is per EQ, add an API to hold/put CQ to be used from
eq.c in downstream patch.
Signed-off-by: NSaeed Mahameed <saeedm@mellanox.com>
Reviewed-by: NGal Pressman <galp@mellanox.com>
      f105b45b
    • S
      net/mlx5: CQ Database per EQ · 02d92f79
      由 Saeed Mahameed 提交于 
      Before this patch the driver had one CQ database protected via one
spinlock, this spinlock is meant to synchronize between CQ
adding/removing and CQ IRQ interrupt handling.

On a system with large number of CPUs and on a work load that requires
lots of interrupts, this global spinlock becomes a very nasty hotspot
and introduces a contention between the active cores, which will
significantly hurt performance and becomes a bottleneck that prevents
seamless cpu scaling.

To solve this we simply move the CQ database and its spinlock to be per
EQ (IRQ), thus per core.

Tested with:
system: 2 sockets, 14 cores per socket, hyperthreading, 2x14x2=56 cores
netperf command: ./super_netperf 200 -P 0 -t TCP_RR  -H <server> -l 30 -- -r 300,300 -o -s 1M,1M -S 1M,1M

WITHOUT THIS PATCH:
Average:     CPU    %usr   %nice    %sys %iowait    %irq   %soft %steal  %guest  %gnice   %idle
Average:     all    4.32    0.00   36.15    0.09    0.00   34.02   0.00    0.00    0.00   25.41

Samples: 2M of event 'cycles:pp', Event count (approx.): 1554616897271
Overhead  Command          Shared Object                 Symbol
+   14.28%  swapper          [kernel.vmlinux]              [k] intel_idle
+   12.25%  swapper          [kernel.vmlinux]              [k] queued_spin_lock_slowpath
+   10.29%  netserver        [kernel.vmlinux]              [k] queued_spin_lock_slowpath
+    1.32%  netserver        [kernel.vmlinux]              [k] mlx5e_xmit

WITH THIS PATCH:
Average:     CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
Average:     all    4.27    0.00   34.31    0.01    0.00   18.71    0.00    0.00    0.00   42.69

Samples: 2M of event 'cycles:pp', Event count (approx.): 1498132937483
Overhead  Command          Shared Object             Symbol
+   23.33%  swapper          [kernel.vmlinux]          [k] intel_idle
+    1.69%  netserver        [kernel.vmlinux]          [k] mlx5e_xmit
Tested-by: NSong Liu <songliubraving@fb.com>
Signed-off-by: NSaeed Mahameed <saeedm@mellanox.com>
Reviewed-by: NGal Pressman <galp@mellanox.com>
      02d92f79
  17. 12 2月, 2018 2 次提交
    • A
      unify {de,}mangle_poll(), get rid of kernel-side POLL... · 7a163b21
      由 Al Viro 提交于 
      except, again, POLLFREE and POLL_BUSY_LOOP.

With this, we finally get to the promised end result:

 - POLL{IN,OUT,...} are plain integers and *not* in __poll_t, so any
   stray instances of ->poll() still using those will be caught by
   sparse.

 - eventpoll.c and select.c warning-free wrt __poll_t

 - no more kernel-side definitions of POLL... - userland ones are
   visible through the entire kernel (and used pretty much only for
   mangle/demangle)

 - same behavior as after the first series (i.e. sparc et.al. epoll(2)
   working correctly).
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      7a163b21
    • L
      vfs: do bulk POLL* -> EPOLL* replacement · a9a08845
      由 Linus Torvalds 提交于 
      This is the mindless scripted replacement of kernel use of POLL*
variables as described by Al, done by this script:

    for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
        L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
        for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
    done

with de-mangling cleanups yet to come.

NOTE! On almost all architectures, the EPOLL* constants have the same
values as the POLL* constants do.  But they keyword here is "almost".
For various bad reasons they aren't the same, and epoll() doesn't
actually work quite correctly in some cases due to this on Sparc et al.

The next patch from Al will sort out the final differences, and we
should be all done.
Scripted-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      a9a08845
  19. 10 2月, 2018 2 次提交
  21. 09 2月, 2018 1 次提交
    • M
      net: Extra '_get' in declaration of arch_get_platform_mac_address · e728789c
      由 Mathieu Malaterre 提交于 
      In commit c7f5d105 ("net: Add eth_platform_get_mac_address() helper."),
two declarations were added:

  int eth_platform_get_mac_address(struct device *dev, u8 *mac_addr);
  unsigned char *arch_get_platform_get_mac_address(void);

An extra '_get' was introduced in arch_get_platform_get_mac_address, remove
it. Fix compile warning using W=1:

  CC      net/ethernet/eth.o
net/ethernet/eth.c:523:24: warning: no previous prototype for ‘arch_get_platform_mac_address’ [-Wmissing-prototypes]
 unsigned char * __weak arch_get_platform_mac_address(void)
                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  AR      net/ethernet/built-in.o
Signed-off-by: NMathieu Malaterre <malat@debian.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      e728789c
  23. 08 2月, 2018 1 次提交
  25. 07 2月, 2018 12 次提交