On Mon, Oct 01, 2007 at 12:29:18 +0200, Andi Kleen wrote: > Sami Farin <[EMAIL PROTECTED]> writes: ... > Can you reproduce it with a non tainted kernel without any patches like CFS > applied?
I tried without CFS and it Oopsed just as nicely, the only difference was that in call trace before :oprofile:wq_sync_buffer there's now cache_reap. Call Trace: [<ffffffff80231988>] get_task_mm+0x18/0x50 [<ffffffff88316b64>] :oprofile:sync_buffer+0xf4/0x450 [<ffffffff88316650>] :oprofile:wq_sync_buffer+0x0/0x60 [<ffffffff88316683>] :oprofile:wq_sync_buffer+0x33/0x60 [<ffffffff80289f10>] cache_reap+0x0/0x130 [<ffffffff80243269>] run_workqueue+0x89/0x120 [<ffffffff80243cf7>] worker_thread+0xc7/0x130 [<ffffffff802474d0>] autoremove_wake_function+0x0/0x40 [<ffffffff80243c30>] worker_thread+0x0/0x130 [<ffffffff802470cd>] kthread+0x4d/0x80 [<ffffffff8020aa78>] child_rip+0xa/0x12 [<ffffffff80247080>] kthread+0x0/0x80 [<ffffffff8020aa6e>] child_rip+0x0/0x12 > The oops happens because oprofile tries to reference a NULL task in > its event buffer for a context switch, which might well be a minor > merging mistake or similar in the CFS backport. ... > > 2007-09-22 13:53:32.527385634 <4>[ 3372.390442] Call Trace: > > 2007-09-22 13:53:32.527390314 <4>[ 3372.390457] [<ffffffff80232b88>] > > get_task_mm+0x18/0x60 > > 2007-09-22 13:53:32.527391990 <4>[ 3372.390484] [<ffffffff8831abd4>] > > :oprofile:sync_buffer+0xf4/0x480 > > 2007-09-22 13:53:32.527393666 <4>[ 3372.390544] [<ffffffff8831a6b0>] > > :oprofile:wq_sync_buffer+0x0/0x60 > > 2007-09-22 13:53:32.527399673 <4>[ 3372.390576] [<ffffffff8831a6e3>] > > :oprofile:wq_sync_buffer+0x33/0x60 > > 2007-09-22 13:53:32.527401419 <4>[ 3372.390602] [<ffffffff80244bfd>] > > run_workqueue+0xcd/0x170 > > 2007-09-22 13:53:32.527406238 <4>[ 3372.390635] [<ffffffff802456b3>] > > worker_thread+0xb3/0x120 > > 2007-09-22 13:53:32.527421324 <4>[ 3372.390652] [<ffffffff80249000>] > > autoremove_wake_function+0x0/0x40 > > 2007-09-22 13:53:32.527423140 <4>[ 3372.390684] [<ffffffff80245600>] > > worker_thread+0x0/0x120 > > 2007-09-22 13:53:32.527424816 <4>[ 3372.390697] [<ffffffff80248bfd>] > > kthread+0x4d/0x80 > > 2007-09-22 13:53:32.527426423 <4>[ 3372.390730] [<ffffffff8020abc8>] > > child_rip+0xa/0x12 > > 2007-09-22 13:53:32.527428099 <4>[ 3372.390810] [<ffffffff80248bb0>] > > kthread+0x0/0x80 > > 2007-09-22 13:53:32.527444931 <4>[ 3372.390822] [<ffffffff8020abbe>] > > child_rip+0x0/0x12 -- Do what you love because life is too short for anything else. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
