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 AuthorDate: Thu Mar 6 11:01:48 2014 +1100 Commit: Stephen Rothwell 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: [] 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:[] [] 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] [] find_vma+0x19/0x70 [ 3.662223] [] __do_page_fault+0x29e/0x560 [ 3.662223] [] ? mntput_no_expire+0x6f/0x1a0 [ 3.662223] [] ? mntput_no_expire+0x11/0x1a0 [ 3.662223] [] ? mntput+0x35/0x40 [ 3.662223] [] ? __fput+0x24f/0x290 [ 3.662223] [] ? trace_hardirqs_off_thunk+0x3a/0x3c [ 3.662223] [] do_page_fault+0xe/0x10 [ 3.662223] [] do_async_page_fault+0x35/0x90 [ 3.662223] [] 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 [] vmacache_find+0x78/0x90 [ 3.662223] RSP [ 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