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[BUG] hugetlb: sleeping function called from invalid context

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From: Gerald Schaefer <gerald.schaefer@...>
To: <linux-kernel@...>
Cc: <linux-mm@...>, <schwidefsky@...>, <heiko.carstens@...>, Mel Gorman <mel@...>
Subject: [BUG] hugetlb: sleeping function called from invalid context
Date: Wednesday, August 6, 2008 - 10:43 am

Hi,

running the libhugetlbfs test suite I met the following bug:

BUG: sleeping function called from invalid context at include/linux/pagemap.h:294
in_atomic():1, irqs_disabled():0
CPU: 0 Not tainted 2.6.27-rc1 #3
Process private (pid: 4531, task: 000000003f68e400, ksp: 000000002a7e3be8)
0700000033a00700 000000002a7e3bf0 0000000000000002 0000000000000000 
       000000002a7e3c90 000000002a7e3c08 000000002a7e3c08 0000000000016472 
       0000000000000000 000000002a7e3be8 0000000000000000 0000000000000000 
       000000002a7e3bf0 000000000000000c 000000002a7e3bf0 000000002a7e3c60 
       0000000000337798 0000000000016472 000000002a7e3bf0 000000002a7e3c40 
Call Trace:
([<00000000000163f4>] show_trace+0x130/0x140)
 [<00000000000164cc>] show_stack+0xc8/0xfc
 [<0000000000016c62>] dump_stack+0xb2/0xc0
 [<000000000003d64a>] __might_sleep+0x136/0x154
 [<000000000008badc>] find_lock_page+0x50/0xb8
 [<00000000000b9b08>] hugetlb_fault+0x4c4/0x684
 [<00000000000a3e3c>] handle_mm_fault+0x8ec/0xb54
 [<00000000003338aa>] do_protection_exception+0x32a/0x3b4
 [<00000000000256b2>] sysc_return+0x0/0x8
 [<0000000000400fba>] 0x400fba

While holding mm->page_table_lock, hugetlb_fault() calls hugetlbfs_pagecache_page(),
which calls find_lock_page(), which may sleep.

Thanks,
Gerald


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Messages in current thread:
[BUG] hugetlb: sleeping function called from invalid context, Gerald Schaefer, (Wed Aug 6, 10:43 am)
[PATCH 1/1] allocate structures for reservation tracking in ..., Andy Whitcroft, (Thu Aug 7, 4:28 pm)
Re: [PATCH 1/1] allocate structures for reservation tracking..., Andrew Morton, (Thu Aug 7, 5:38 pm)
[PATCH 1/1] allocate structures for reservation tracking in ..., Andy Whitcroft, (Mon Aug 11, 1:58 pm)
[PATCH 1/1] allocate structures for reservation tracking in ..., Andy Whitcroft, (Fri Aug 8, 7:10 am)
Re: [PATCH 1/1] allocate structures for reservation tracking..., Gerald Schaefer, (Fri Aug 8, 8:57 am)
Re: [PATCH 1/1] allocate structures for reservation tracking..., Andy Whitcroft, (Fri Aug 8, 6:16 am)
Re: [PATCH 1/1] allocate structures for reservation tracking..., Mel Gorman, (Fri Aug 8, 4:33 am)
[PATCH 1/1] allocate structures for reservation tracking in ..., Andy Whitcroft, (Wed Aug 6, 3:03 pm)
Re: [PATCH 1/1] allocate structures for reservation tracking..., Gerald Schaefer, (Thu Aug 7, 7:35 am)