Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50

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From: Paul E. McKenney
Date: Tuesday, June 3, 2008 - 8:31 pm

On Fri, May 30, 2008 at 10:34:28PM +0400, Alexey Dobriyan wrote:

Interesting...


The fact that put_io_context() was called from exit_io_context() means
that this is the last thread of a process exiting.  The fact that
cfq_free_io_context() was called (via cfq_dtor()) from put_io_context()
means that this was the last reference to the io_context.  Yet when
we traverse the cic_list, part of it is corrupted -- ascii "k"s through
RAX and RBX.

In other news, I have been hammering preemptable RCU with rcutorture, and
will be making rcutorture more aggressive.  When I get back home, I will
try reproducing this test workload.

							Thanx, Paul

--
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Messages in current thread:
2.6.25-$sha1: RIP call_for_each_cic+0x25/0x50, Alexey Dobriyan, (Sun Apr 27, 3:55 pm)
Re: 2.6.25-$sha1: RIP call_for_each_cic+0x25/0x50, Andrew Morton, (Mon Apr 28, 5:01 am)
Re: 2.6.25-$sha1: RIP call_for_each_cic+0x25/0x50, Jens Axboe, (Mon Apr 28, 5:04 am)
Re: 2.6.25-$sha1: RIP call_for_each_cic+0x25/0x50, Alexey Dobriyan, (Mon Apr 28, 12:55 pm)
Re: 2.6.25-$sha1: RIP call_for_each_cic+0x25/0x50, Alexey Dobriyan, (Mon Apr 28, 11:21 pm)
Re: 2.6.25-$sha1: RIP call_for_each_cic+0x25/0x50, Jens Axboe, (Tue Apr 29, 2:06 am)
Re: 2.6.25-$sha1: RIP call_for_each_cic+0x25/0x50, Alexey Dobriyan, (Wed Apr 30, 3:12 pm)
Re: 2.6.25-$sha1: RIP call_for_each_cic+0x25/0x50, Jens Axboe, (Sun May 4, 12:08 pm)
Re: 2.6.25-$sha1: RIP call_for_each_cic+0x25/0x50, Jens Axboe, (Sun May 4, 12:25 pm)
Re: 2.6.25-$sha1: RIP call_for_each_cic+0x25/0x50, Alexey Dobriyan, (Sun May 4, 1:15 pm)
Re: 2.6.25-$sha1: RIP call_for_each_cic+0x25/0x50, Alexey Dobriyan, (Sun May 4, 2:17 pm)
2.6.25-$sha1: RIP __call_for_each_cic+0x20/0x50, Alexey Dobriyan, (Sat May 10, 3:37 am)
2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Alexey Dobriyan, (Mon May 26, 10:27 pm)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Jens Axboe, (Tue May 27, 6:35 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Paul E. McKenney, (Tue May 27, 8:18 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Jens Axboe, (Wed May 28, 3:07 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Paul E. McKenney, (Wed May 28, 3:30 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Fabio Checconi, (Wed May 28, 4:52 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Jens Axboe, (Wed May 28, 4:58 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Jens Axboe, (Wed May 28, 5:44 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Paul E. McKenney, (Wed May 28, 6:20 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Paul E. McKenney, (Wed May 28, 9:38 pm)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Jens Axboe, (Wed May 28, 11:26 pm)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Jens Axboe, (Wed May 28, 11:42 pm)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Paul E. McKenney, (Thu May 29, 2:17 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Jens Axboe, (Thu May 29, 3:13 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Paul E. McKenney, (Thu May 29, 4:25 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Jens Axboe, (Thu May 29, 4:44 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Paul E. McKenney, (Thu May 29, 5:11 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Jens Axboe, (Thu May 29, 5:13 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Paul E. McKenney, (Fri May 30, 4:04 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Paul E. McKenney, (Fri May 30, 6:16 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Alexey Dobriyan, (Fri May 30, 11:34 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Paul E. McKenney, (Tue Jun 3, 8:31 pm)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Linus Torvalds, (Wed Jun 4, 11:32 am)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Paul E. McKenney, (Wed Jun 4, 9:23 pm)
Re: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50, Paul E. McKenney, (Fri Jun 6, 7:49 am)