linux-kernel - Re: BUG: sleeping function called from invalid context at fs/proc/task

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Date:	Wed, 28 Mar 2012 17:09:00 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
cc:	Sasha Levin <levinsasha928@...il.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Subject: Re: BUG: sleeping function called from invalid context at
 fs/proc/task_mmu.c:826

On Wed, 28 Mar 2012, Dave Jones wrote:

> Just hit this on v3.3-7919-g6658a69
> 
> 	Dave
> 
> BUG: sleeping function called from invalid context at fs/proc/task_mmu.c:826
> in_atomic(): 1, irqs_disabled(): 0, pid: 15123, name: trinity
> INFO: lockdep is turned off.
> Pid: 15123, comm: trinity Not tainted 3.3.0+ #30
> Call Trace:
>  [<ffffffff8109bf75>] __might_sleep+0x145/0x200
>  [<ffffffff8122ee77>] ? pagemap_pte_range+0x67/0x340
>  [<ffffffff8122ef3f>] pagemap_pte_range+0x12f/0x340
>  [<ffffffff811924b9>] walk_page_range+0x389/0x520
>  [<ffffffff8122e9a2>] pagemap_read+0x282/0x350
>  [<ffffffff8122ee10>] ? clear_refs_pte_range+0x180/0x180
>  [<ffffffff8122d340>] ? get_vmalloc_info+0x110/0x110
>  [<ffffffff8122e5c0>] ? pid_numa_maps_open+0x20/0x20
>  [<ffffffff811c3a43>] vfs_read+0xb3/0x180
>  [<ffffffff811c3b5d>] sys_read+0x4d/0x90
>  [<ffffffff816c02a9>] system_call_fastpath+0x16/0x1b
> 

This looks like it was already reported as 
http://marc.info/?l=linux-kernel&m=133289254323384 by Sasha Levin.  We're 
waiting for a patch to push to stable from Naoya Horiguchi.
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