| Summary: | Server gets stuck in sna_accel_block_handler from time to time | ||
|---|---|---|---|
| Product: | xorg | Reporter: | Clemens Eisserer <linuxhippy> |
| Component: | Driver/intel | Assignee: | Chris Wilson <chris> |
| Status: | RESOLVED FIXED | QA Contact: | Xorg Project Team <xorg-team> |
| Severity: | normal | ||
| Priority: | medium | ||
| Version: | git | ||
| Hardware: | Other | ||
| OS: | All | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
And I had just finished debugging this one. If only I had fixed it an hour ago! ;) commit 34fe3cbb316c36c7022735cf9b03d8b655e04434 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Wed Mar 7 17:49:01 2012 +0000 sna: Avoid recursive calls to kgem_retire_partials() Whilst iterating the partial list and uploading the buffers, we need to avoid trigger a recursive call into retire should we attempt to shrink a buffer. Such a recursive call will modify the list beneath us so that we chase a stale pointer and wreak havoc with memory corruption. Reported-by: Clemens Eisserer <linuxhippy@gmail.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=47061 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> |
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On my i945GM based Notebook, I experience hangs every few hours where I am still able to move the mouse-coursor, however the rest of X is completly unresponsive. Intel: 2.18.0-27-gaaed9e9 pstack-output: #0 0x005b6831 in _kgem_submit () from /usr/lib/xorg/modules/drivers/intel_drv.so #1 0x005d8b93 in sna_accel_block_handler () from /usr/lib/xorg/modules/drivers/intel_drv.so #2 0x005e60ba in sna_block_handler () from /usr/lib/xorg/modules/drivers/intel_drv.so #3 0x0807a488 in BlockHandler () #4 0x080a58f1 in WaitForSomething () #5 0x08075eae in ?? () #6 0x0806439a in ?? () #7 0x41e616b3 in __libc_start_main () from /lib/libc.so.6 #8 0x080646c9 in _start () gdb-output at some random time: 0x005b683d in kgem_finish_partials (kgem=0x86f839c) at kgem.c:1425 1425 list_for_each_entry_safe(bo, next, &kgem->active_partials, base.list) { (gdb) bt #0 0x005b683d in kgem_finish_partials (kgem=0x86f839c) at kgem.c:1425 #1 _kgem_submit (kgem=0x86f839c) at kgem.c:1681 #2 0x005d8b93 in kgem_bo_submit (bo=0x8729050, kgem=0x86f839c) at kgem.h:253 #3 kgem_bo_flush (bo=0x8729050, kgem=0x86f839c) at kgem.h:259 #4 sna_accel_flush (sna=0x86f8260) at sna_accel.c:11695 #5 sna_accel_block_handler (sna=0x86f8260) at sna_accel.c:11959 #6 0x005e60ba in sna_block_handler (i=0, data=0x86f8260, timeout=0xbfe0e39c, read_mask=0x8235c20) at sna_driver.c:593 #7 0x0807a488 in BlockHandler () #8 0x080a58f1 in WaitForSomething () #9 0x08075eae in ?? () #10 0x0806439a in ?? () #11 0x41e616b3 in __libc_start_main () from /lib/libc.so.6 #12 0x080646c9 in _start () Xorg.log output: [ 19613.304] [mi] EQ overflowing. The server is probably stuck in an infinite loop. [ 19613.304] Backtrace: [ 19613.304] 0: /usr/bin/X (xorg_backtrace+0x3c) [0x80a869c] [ 19613.304] 1: /usr/bin/X (mieqEnqueue+0x175) [0x81ac2e5] [ 19613.304] 2: /usr/bin/X (0x8047000+0x43882) [0x808a882] [ 19613.305] 3: /usr/bin/X (xf86PostMotionEventM+0xf2) [0x80dbbd2] [ 19613.305] 4: /usr/lib/xorg/modules/input/evdev_drv.so (0x152000+0x343e) [0x15543e] [ 19613.305] 5: /usr/lib/xorg/modules/input/evdev_drv.so (0x152000+0x492f) [0x15692f] [ 19613.305] 6: /usr/bin/X (0x8047000+0x7f5f0) [0x80c65f0] [ 19613.305] 7: /usr/bin/X (0x8047000+0xa60bb) [0x80ed0bb] [ 19613.305] 8: (vdso) (__kernel_sigreturn+0x0) [0xe29400] [ 19613.305] 9: /usr/lib/xorg/modules/drivers/intel_drv.so (0x583000+0x337f8) [0x5b67f8] [ 19613.305] 10: /usr/lib/xorg/modules/drivers/intel_drv.so (0x583000+0x55b93) [0x5d8b93] [ 19613.305] 11: /usr/lib/xorg/modules/drivers/intel_drv.so (0x583000+0x630ba) [0x5e60ba] [ 19613.305] 12: /usr/bin/X (BlockHandler+0x58) [0x807a488] [ 19613.305] 13: /usr/bin/X (WaitForSomething+0x111) [0x80a58f1] [ 19613.305] 14: /usr/bin/X (0x8047000+0x2eeae) [0x8075eae] [ 19613.305] 15: /usr/bin/X (0x8047000+0x1d39a) [0x806439a] [ 19613.305] 16: /lib/libc.so.6 (__libc_start_main+0xf3) [0x41e616b3] [ 19613.305] 17: /usr/bin/X (0x8047000+0x1d6c9) [0x80646c9]