kernel-small_fixes.patch

   1 --- linux-2.6.33/scripts/mod/modpost.c~ 2010-02-24 19:52:17.000000000 +0100
   2 +++ linux-2.6.33/scripts/mod/modpost.c  2010-03-07 14:26:47.242168558 +0100
   3 @@ -15,7 +15,8 @@
   4  #include <stdio.h>
   5  #include <ctype.h>
   6  #include "modpost.h"
   7 -#include "../../include/generated/autoconf.h"
   8 +// PLD architectures don't use CONFIG_SYMBOL_PREFIX
   9 +//#include "../../include/generated/autoconf.h"
  10  #include "../../include/linux/license.h"
  11
  12  /* Some toolchains use a `_' prefix for all user symbols. */
  13
  14 --- linux-3.0/scripts/kconfig/lxdialog/check-lxdialog.sh~       2011-07-22 04:17:23.000000000 +0200
  15 +++ linux-3.0/scripts/kconfig/lxdialog/check-lxdialog.sh        2011-08-25 21:26:04.799150642 +0200
  16 @@ -9,6 +9,12 @@
  17                         $cc -print-file-name=lib${lib}.${ext} | grep -q /
  18                         if [ $? -eq 0 ]; then
  19                                 echo "-l${lib}"
  20 +                               for libt in tinfow tinfo ; do
  21 +                                       $cc -print-file-name=lib${libt}.${ext} | grep -q /
  22 +                                       if [ $? -eq 0 ]; then
  23 +                                               echo "-l${libt}"
  24 +                                       fi
  25 +                               done
  26                                 exit
  27                         fi
  28                 done
  29
  30 From 7a29ac474a47eb8cf212b45917683ae89d6fa13b Mon Sep 17 00:00:00 2001
  31 From: Chris Mason <clm@fb.com>
  32 Date: Tue, 10 Nov 2015 10:10:34 +1100
  33 Subject: xfs: give all workqueues rescuer threads
  34
  35 We're consistently hitting deadlocks here with XFS on recent kernels.
  36 After some digging through the crash files, it looks like everyone in
  37 the system is waiting for XFS to reclaim memory.
  38
  39 Something like this:
  40
  41 PID: 2733434  TASK: ffff8808cd242800  CPU: 19  COMMAND: "java"
  42  #0 [ffff880019c53588] __schedule at ffffffff818c4df2
  43  #1 [ffff880019c535d8] schedule at ffffffff818c5517
  44  #2 [ffff880019c535f8] _xfs_log_force_lsn at ffffffff81316348
  45  #3 [ffff880019c53688] xfs_log_force_lsn at ffffffff813164fb
  46  #4 [ffff880019c536b8] xfs_iunpin_wait at ffffffff8130835e
  47  #5 [ffff880019c53728] xfs_reclaim_inode at ffffffff812fd453
  48  #6 [ffff880019c53778] xfs_reclaim_inodes_ag at ffffffff812fd8c7
  49  #7 [ffff880019c53928] xfs_reclaim_inodes_nr at ffffffff812fe433
  50  #8 [ffff880019c53958] xfs_fs_free_cached_objects at ffffffff8130d3b9
  51  #9 [ffff880019c53968] super_cache_scan at ffffffff811a6f73
  52 #10 [ffff880019c539c8] shrink_slab at ffffffff811460e6
  53 #11 [ffff880019c53aa8] shrink_zone at ffffffff8114a53f
  54 #12 [ffff880019c53b48] do_try_to_free_pages at ffffffff8114a8ba
  55 #13 [ffff880019c53be8] try_to_free_pages at ffffffff8114ad5a
  56 #14 [ffff880019c53c78] __alloc_pages_nodemask at ffffffff8113e1b8
  57 #15 [ffff880019c53d88] alloc_kmem_pages_node at ffffffff8113e671
  58 #16 [ffff880019c53dd8] copy_process at ffffffff8104f781
  59 #17 [ffff880019c53ec8] do_fork at ffffffff8105129c
  60 #18 [ffff880019c53f38] sys_clone at ffffffff810515b6
  61 #19 [ffff880019c53f48] stub_clone at ffffffff818c8e4d
  62
  63 xfs_log_force_lsn is waiting for logs to get cleaned, which is waiting
  64 for IO, which is waiting for workers to complete the IO which is waiting
  65 for worker threads that don't exist yet:
  66
  67 PID: 2752451  TASK: ffff880bd6bdda00  CPU: 37  COMMAND: "kworker/37:1"
  68  #0 [ffff8808d20abbb0] __schedule at ffffffff818c4df2
  69  #1 [ffff8808d20abc00] schedule at ffffffff818c5517
  70  #2 [ffff8808d20abc20] schedule_timeout at ffffffff818c7c6c
  71  #3 [ffff8808d20abcc0] wait_for_completion_killable at ffffffff818c6495
  72  #4 [ffff8808d20abd30] kthread_create_on_node at ffffffff8106ec82
  73  #5 [ffff8808d20abdf0] create_worker at ffffffff8106752f
  74  #6 [ffff8808d20abe40] worker_thread at ffffffff810699be
  75  #7 [ffff8808d20abec0] kthread at ffffffff8106ef59
  76  #8 [ffff8808d20abf50] ret_from_fork at ffffffff818c8ac8
  77
  78 I think we should be using WQ_MEM_RECLAIM to make sure this thread
  79 pool makes progress when we're not able to allocate new workers.
  80
  81 [dchinner: make all workqueues WQ_MEM_RECLAIM]
  82
  83 Signed-off-by: Chris Mason <clm@fb.com>
  84 Reviewed-by: Dave Chinner <dchinner@redhat.com>
  85 Signed-off-by: Dave Chinner <david@fromorbit.com>
  86 ---
  87  fs/xfs/xfs_super.c | 7 ++++---
  88  1 file changed, 4 insertions(+), 3 deletions(-)
  89
  90 diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
  91 index 29531ec..65fbfb7 100644
  92 --- a/fs/xfs/xfs_super.c
  93 +++ b/fs/xfs/xfs_super.c
  94 @@ -838,17 +838,18 @@ xfs_init_mount_workqueues(
  95                 goto out_destroy_unwritten;
  96
  97         mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
  98 -                       WQ_FREEZABLE, 0, mp->m_fsname);
  99 +                       WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
 100         if (!mp->m_reclaim_workqueue)
 101                 goto out_destroy_cil;
 102
 103         mp->m_log_workqueue = alloc_workqueue("xfs-log/%s",
 104 -                       WQ_FREEZABLE|WQ_HIGHPRI, 0, mp->m_fsname);
 105 +                       WQ_MEM_RECLAIM|WQ_FREEZABLE|WQ_HIGHPRI, 0,
 106 +                       mp->m_fsname);
 107         if (!mp->m_log_workqueue)
 108                 goto out_destroy_reclaim;
 109
 110         mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
 111 -                       WQ_FREEZABLE, 0, mp->m_fsname);
 112 +                       WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
 113         if (!mp->m_eofblocks_workqueue)
 114                 goto out_destroy_log;
 115
 116 --
 117 cgit v0.11.2
 118