Message-ID: <20140310024356.GB9322@localhost>
Date:	Mon, 10 Mar 2014 10:43:56 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Davidlohr Bueso <davidlohr@...com>
Cc:	Rik van Riel <riel@...hat.com>,
	Michel Lespinasse <walken@...gle.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [vma caching] BUG: unable to handle kernel paging request at
 ffff880008142f40

Hi Davidlohr,

I got the below dmesg and the first bad commit is

git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit 0d9ad4220e6d73f63a9eeeaac031b92838f75bb3
Author:     Davidlohr Bueso <davidlohr@...com>
AuthorDate: Thu Mar 6 11:01:48 2014 +1100
Commit:     Stephen Rothwell <sfr@...b.auug.org.au>
CommitDate: Thu Mar 6 11:01:48 2014 +1100

    mm: per-thread vma caching
    
hwclock: can't open '/dev/misc/rtc': No such file or directory
Running postinst /etc/rpm-postinsts/100...
[    3.658976] BUG: unable to handle kernel paging request at ffff880008142f40
[    3.661422] IP: [<ffffffff8111a1d8>] vmacache_find+0x78/0x90
[    3.662223] PGD 2542067 PUD 2543067 PMD fba5067 PTE 8000000008142060
[    3.662223] Oops: 0000 [#1] DEBUG_PAGEALLOC
[    3.662223] Modules linked in:
[    3.662223] CPU: 0 PID: 326 Comm: 90-trinity Not tainted 3.14.0-rc5-next-20140307 #1
[    3.662223] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.662223] task: ffff8800083020d0 ti: ffff8800082a0000 task.ti: ffff8800082a0000
[    3.662223] RIP: 0010:[<ffffffff8111a1d8>]  [<ffffffff8111a1d8>] vmacache_find+0x78/0x90
[    3.662223] RSP: 0000:ffff8800082a1e00  EFLAGS: 00010282
[    3.662223] RAX: ffff880008142f40 RBX: 00000000000000a9 RCX: ffff8800083020d0
[    3.662223] RDX: 0000000000000002 RSI: 00007fff8a141698 RDI: ffff880008124bc0
[    3.662223] RBP: ffff8800082a1e00 R08: 0000000000000000 R09: 0000000000000001
[    3.662223] R10: ffff8800083020d0 R11: 0000000000000000 R12: 00007fff8a141698
[    3.662223] R13: ffff880008124bc0 R14: ffff8800082a1f58 R15: ffff8800083020d0
[    3.662223] FS:  00007fe3ca364700(0000) GS:ffffffff81a06000(0000) knlGS:0000000000000000
[    3.662223] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.662223] CR2: ffff880008142f40 CR3: 000000000824c000 CR4: 00000000000006b0
[    3.662223] Stack:
[    3.662223]  ffff8800082a1e28 ffffffff81125219 00000000000000a9 00007fff8a141698
[    3.662223]  ffff880008124bc0 ffff8800082a1f28 ffffffff816d71fe 0000000000000246
[    3.662223]  0000000000000002 ffff880008124c58 0000000000000006 0000000000000010
[    3.662223] Call Trace:
[    3.662223]  [<ffffffff81125219>] find_vma+0x19/0x70
[    3.662223]  [<ffffffff816d71fe>] __do_page_fault+0x29e/0x560
[    3.662223]  [<ffffffff8116cc6f>] ? mntput_no_expire+0x6f/0x1a0
[    3.662223]  [<ffffffff8116cc11>] ? mntput_no_expire+0x11/0x1a0
[    3.662223]  [<ffffffff8116cdd5>] ? mntput+0x35/0x40
[    3.662223]  [<ffffffff8114f51f>] ? __fput+0x24f/0x290
[    3.662223]  [<ffffffff812794ca>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[    3.662223]  [<ffffffff816d74ce>] do_page_fault+0xe/0x10
[    3.662223]  [<ffffffff816d6ad5>] do_async_page_fault+0x35/0x90
[    3.662223]  [<ffffffff816d3b05>] async_page_fault+0x25/0x30
[    3.662223] Code: c7 81 b0 02 00 00 00 00 00 00 eb 32 0f 1f 80 00 00 00 00 31 d2 66 0f 1f 44 00 00 48 63 c2 48 8b 84 c1 98 02 00 00 48 85 c0 74 0b <48> 39 30 77 06 48 3b 70 08 72 0a 83 c2 01 83 fa 04 75 dd 31 c0 
[    3.662223] RIP  [<ffffffff8111a1d8>] vmacache_find+0x78/0x90
[    3.662223]  RSP <ffff8800082a1e00>
[    3.662223] CR2: ffff880008142f40
[    3.662223] ---[ end trace dead6556b35f2f50 ]---
[    3.662223] Kernel panic - not syncing: Fatal exception

git bisect start 1b0a7e3263168a06d3858798e48c5a21d1c78d3c 56032fc504c9ce9dd6fd697e4687441a7d0ea4a2 --
git bisect  bad 8e6a5f1094819a747c13d6ffef5c44607fb757f8  # 19:31      0-      2  Merge branch 'akpm-current/current'
git bisect  bad e37f7e706daab128221f1fe72967ea4f9ac0c1da  # 19:53      0-      2  zram: move zram size warning to documentation
git bisect good 7f0885cfba68ed357474a55eaa13a5757371f4bd  # 20:13     22+      0  mm-keep-page-cache-radix-tree-nodes-in-check-fix
git bisect good 0caff8dc0cabb8015faa1425c0e61eab4f9c9d2b  # 20:43     22+      3  mm,numa: reorganize change_pmd_range()
git bisect good d6e9552645e4fc33985e6b642ffd2841915eacaa  # 21:05     22+      6  tools/vm/page-types.c: page-cache sniffing feature
git bisect  bad 1d69676e3d045a51ecf3f8f3b6239c46e934f323  # 21:17      0-      1  mm: use macros from compiler.h instead of __attribute__((...))
git bisect good 70051b9078a325e95a0944c688723512ae14459e  # 21:32     22+      5  mm: cleanup size checks in filemap_fault() and filemap_map_pages()
git bisect  bad 0d9ad4220e6d73f63a9eeeaac031b92838f75bb3  # 21:45     14-     19  mm: per-thread vma caching
git bisect good 2c42ccb3347d6e08b3fae34f709a25edbc7b9ad4  # 22:06     48+      3  mm-add-debugfs-tunable-for-fault_around_order-checkpatch-fixes
# first bad commit: [0d9ad4220e6d73f63a9eeeaac031b92838f75bb3] mm: per-thread vma caching
git bisect good 2c42ccb3347d6e08b3fae34f709a25edbc7b9ad4  # 22:13    144+     18  mm-add-debugfs-tunable-for-fault_around_order-checkpatch-fixes
git bisect  bad 1b0a7e3263168a06d3858798e48c5a21d1c78d3c  # 22:13      0-     15  Add linux-next specific files for 20140307
git bisect good ca62eec4e524591b82d9edf7a18e3ae6b691517d  # 22:53    144+     19  Merge branch 'for-3.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
git bisect  bad 1b0a7e3263168a06d3858798e48c5a21d1c78d3c  # 22:53      0-     15  Add linux-next specific files for 20140307

Thanks,
Fengguang

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