linux-kernel - Re: [PATCH -rt] update kmap

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Message-Id: <1167253481.14081.41.camel@imap.mvista.com>
Date:	Wed, 27 Dec 2006 13:04:41 -0800
From:	Daniel Walker <dwalker@...sta.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH -rt] update kmap_atomic on !HIGHMEM

On Wed, 2006-12-27 at 21:54 +0100, Ingo Molnar wrote:
> * Daniel Walker <dwalker@...sta.com> wrote:
> 
> > I got some scheduling while atomic on x86-64 , [...]
> 
> please post those messages too.
> 
> 	Ingo

Ok .. This is from 2.6.20-rc2-rt0 tho .

BUG: scheduling while atomic: kswapd0/0x00000001/244, CPU#1

Call Trace:
[<ffffffff80268f80>] __sched_text_start+0xb0/0xb9f
[<ffffffff8028fa8c>] task_rq_lock+0x4c/0x90
[<ffffffff8028fdd3>] rt_mutex_setprio+0xb3/0xd0
[<ffffffff802bb2c4>] add_preempt_count+0x14/0xf0
[<ffffffff802b1353>] task_blocks_on_rt_mutex+0x163/0x1d0
[<ffffffff80269da5>] schedule+0xe5/0x110
[<ffffffff8026afa2>] rt_spin_lock_slowlock+0x102/0x1b0
[<ffffffff802c9b71>] swap_duplicate+0x51/0x100
[<ffffffff802c94b2>] move_to_swap_cache+0x32/0x70
[<ffffffff802cf4ba>] shmem_writepage+0xaa/0x1a0
[<ffffffff802c35e0>] shrink_inactive_list+0x430/0x950
[<ffffffff802134f4>] shrink_zone+0xe4/0x110
[<ffffffff8025e629>] kswapd+0x379/0x510
[<ffffffff802a8270>] autoremove_wake_function+0x0/0x30
[<ffffffff8025e2b0>] kswapd+0x0/0x510
[<ffffffff80234c89>] kthread+0xd9/0x120
[<ffffffff8022981c>] schedule_tail+0xdc/0x130
[<ffffffff802a80a0>] keventd_create_kthread+0x0/0x90
[<ffffffff80265ef8>] child_rip+0xa/0x12
[<ffffffff802a80a0>] keventd_create_kthread+0x0/0x90
[<ffffffff80234bb0>] kthread+0x0/0x120
[<ffffffff80265eee>] child_rip+0x0/0x12

---------------------------
| preempt count: 00000001 ]
| 1-level deep critical section nesting:
----------------------------------------
 .. [<ffffffff802cc111>] .... shmem_swp_entry+0x31/0x1a0
 .....[<00000000>] ..   ( <= 0x0)


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