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 --- a/Makefile  2016-11-10 20:41:43.646224629 +0100
  30 +++ b/Makefile  2016-11-10 20:40:35.640323501 +0100
  31 @@ -784,6 +774,9 @@
  32  # Prohibit date/time macros, which would make the build non-deterministic
  33  KBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
  34
  35 +# enforce correct pointer usage
  36 +KBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
  37 +
  38  # use the deterministic mode of AR if available
  39  KBUILD_ARFLAGS := $(call ar-option,D)
  40
  41
  42 From 7a29ac474a47eb8cf212b45917683ae89d6fa13b Mon Sep 17 00:00:00 2001
  43 From: Chris Mason <clm@fb.com>
  44 Date: Tue, 10 Nov 2015 10:10:34 +1100
  45 Subject: xfs: give all workqueues rescuer threads
  46
  47 We're consistently hitting deadlocks here with XFS on recent kernels.
  48 After some digging through the crash files, it looks like everyone in
  49 the system is waiting for XFS to reclaim memory.
  50
  51 Something like this:
  52
  53 PID: 2733434  TASK: ffff8808cd242800  CPU: 19  COMMAND: "java"
  54  #0 [ffff880019c53588] __schedule at ffffffff818c4df2
  55  #1 [ffff880019c535d8] schedule at ffffffff818c5517
  56  #2 [ffff880019c535f8] _xfs_log_force_lsn at ffffffff81316348
  57  #3 [ffff880019c53688] xfs_log_force_lsn at ffffffff813164fb
  58  #4 [ffff880019c536b8] xfs_iunpin_wait at ffffffff8130835e
  59  #5 [ffff880019c53728] xfs_reclaim_inode at ffffffff812fd453
  60  #6 [ffff880019c53778] xfs_reclaim_inodes_ag at ffffffff812fd8c7
  61  #7 [ffff880019c53928] xfs_reclaim_inodes_nr at ffffffff812fe433
  62  #8 [ffff880019c53958] xfs_fs_free_cached_objects at ffffffff8130d3b9
  63  #9 [ffff880019c53968] super_cache_scan at ffffffff811a6f73
  64 #10 [ffff880019c539c8] shrink_slab at ffffffff811460e6
  65 #11 [ffff880019c53aa8] shrink_zone at ffffffff8114a53f
  66 #12 [ffff880019c53b48] do_try_to_free_pages at ffffffff8114a8ba
  67 #13 [ffff880019c53be8] try_to_free_pages at ffffffff8114ad5a
  68 #14 [ffff880019c53c78] __alloc_pages_nodemask at ffffffff8113e1b8
  69 #15 [ffff880019c53d88] alloc_kmem_pages_node at ffffffff8113e671
  70 #16 [ffff880019c53dd8] copy_process at ffffffff8104f781
  71 #17 [ffff880019c53ec8] do_fork at ffffffff8105129c
  72 #18 [ffff880019c53f38] sys_clone at ffffffff810515b6
  73 #19 [ffff880019c53f48] stub_clone at ffffffff818c8e4d
  74
  75 xfs_log_force_lsn is waiting for logs to get cleaned, which is waiting
  76 for IO, which is waiting for workers to complete the IO which is waiting
  77 for worker threads that don't exist yet:
  78
  79 PID: 2752451  TASK: ffff880bd6bdda00  CPU: 37  COMMAND: "kworker/37:1"
  80  #0 [ffff8808d20abbb0] __schedule at ffffffff818c4df2
  81  #1 [ffff8808d20abc00] schedule at ffffffff818c5517
  82  #2 [ffff8808d20abc20] schedule_timeout at ffffffff818c7c6c
  83  #3 [ffff8808d20abcc0] wait_for_completion_killable at ffffffff818c6495
  84  #4 [ffff8808d20abd30] kthread_create_on_node at ffffffff8106ec82
  85  #5 [ffff8808d20abdf0] create_worker at ffffffff8106752f
  86  #6 [ffff8808d20abe40] worker_thread at ffffffff810699be
  87  #7 [ffff8808d20abec0] kthread at ffffffff8106ef59
  88  #8 [ffff8808d20abf50] ret_from_fork at ffffffff818c8ac8
  89
  90 I think we should be using WQ_MEM_RECLAIM to make sure this thread
  91 pool makes progress when we're not able to allocate new workers.
  92
  93 [dchinner: make all workqueues WQ_MEM_RECLAIM]
  94
  95 Signed-off-by: Chris Mason <clm@fb.com>
  96 Reviewed-by: Dave Chinner <dchinner@redhat.com>
  97 Signed-off-by: Dave Chinner <david@fromorbit.com>
  98 ---
  99  fs/xfs/xfs_super.c | 7 ++++---
 100  1 file changed, 4 insertions(+), 3 deletions(-)
 101
 102 diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
 103 index 29531ec..65fbfb7 100644
 104 --- a/fs/xfs/xfs_super.c
 105 +++ b/fs/xfs/xfs_super.c
 106 @@ -838,17 +838,18 @@ xfs_init_mount_workqueues(
 107                 goto out_destroy_unwritten;
 108
 109         mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
 110 -                       WQ_FREEZABLE, 0, mp->m_fsname);
 111 +                       WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
 112         if (!mp->m_reclaim_workqueue)
 113                 goto out_destroy_cil;
 114
 115         mp->m_log_workqueue = alloc_workqueue("xfs-log/%s",
 116 -                       WQ_FREEZABLE|WQ_HIGHPRI, 0, mp->m_fsname);
 117 +                       WQ_MEM_RECLAIM|WQ_FREEZABLE|WQ_HIGHPRI, 0,
 118 +                       mp->m_fsname);
 119         if (!mp->m_log_workqueue)
 120                 goto out_destroy_reclaim;
 121
 122         mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
 123 -                       WQ_FREEZABLE, 0, mp->m_fsname);
 124 +                       WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
 125         if (!mp->m_eofblocks_workqueue)
 126                 goto out_destroy_log;