[Bug 88026] New: [i855GM, 3.18] X getting stuck in congestion_wait for shrinker

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88026

            Bug ID: 88026
           Summary: [i855GM, 3.18] X getting stuck in congestion_wait for
                    shrinker
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: bonbons at sysophe.eu
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 111736
  --> https://bugs.freedesktop.org/attachment.cgi?id=111736&action=edit
/sys/kernel/debug/dri/*/

On my Acer system I more or less often have system either stall for some short
time (graphics wise) or eventually for an unlimited amount of time.

When system does not recover by itself usually the only solution is to kill X.
Dropping VM caches (/proc/sys/vm/drop_caches) does not help.

PCIID: 8086:3582
Kernel: 3.18
DDX: xf86-video-intel-2.99.916
Mesa: 10.2.8


Xorg /proc/$pid/stack:
[<c10b8914>] congestion_wait+0x54/0x90
[<c10aff75>] shrink_inactive_list+0x355/0x390
[<c10b088a>] shrink_zone+0x60a/0x750
[<c10b0d62>] try_to_free_pages+0x392/0x5f0
[<c10a8fb8>] __alloc_pages_nodemask+0x328/0x7d0
[<c10db6b9>] do_huge_pmd_anonymous_page+0xe9/0x320
[<c10c2f6d>] handle_mm_fault+0x2ad/0x800
[<c103088a>] __do_page_fault+0x15a/0x490
[<c1030ccb>] do_page_fault+0xb/0x10
[<c16bb6c1>] error_code+0x65/0x6c
[<c1301e06>] drm_ioctl+0x1c6/0x650
[<c10eebbb>] do_vfs_ioctl+0x34b/0x540
[<c10eedee>] SyS_ioctl+0x3e/0x80
[<c16badd2>] sysenter_after_call+0x0/0x14
[<ffffffff>] 0xffffffff

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