Greetings,

I got the below dmesg and the first bad commit is

commit a256ba092ec57213f96059d41ac5473ff92f5e7c
Author: Nicholas Bellinger <nab@linux-iscsi.org>
Date:   Sat May 18 02:40:43 2013 -0700

    scsi: Split scsi_dispatch_cmd into __scsi_dispatch_cmd setup
    
    Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>


[   29.326637]  vda: unknown partition table
[   29.386474] ------------[ cut here ]------------
[   29.388453] WARNING: at /c/kernel-tests/src/stable/fs/sysfs/dir.c:530 sysfs_add_one+0x96/0xaa()
[   29.391061] sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:05.0/virtio1/block/vda/mq/0/cpu0'
[   29.403737] Modules linked in:
[   29.406289] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.10.0-rc4-13319-g10adcdf #541
[   29.407936] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007
[   29.410433]  ffffffff81d9d860 ffff88001df65958 ffffffff81994579 ffff88001df65998
[   29.416742]  ffffffff81068740 ffff88001bf6f000 ffff88001df659a8 ffff88001bf6f000
[   29.418708]  ffff88001b8fee60 00000000ffffffef ffff88001df65a48 ffff88001df659f8
[   29.431422] Call Trace:
[   29.433133]  [<ffffffff81994579>] dump_stack+0x19/0x1b
[   29.434352]  [<ffffffff81068740>] warn_slowpath_common+0x67/0x80
[   29.435606]  [<ffffffff810687fc>] warn_slowpath_fmt+0x46/0x48
[   29.437753]  [<ffffffff811c0130>] sysfs_add_one+0x96/0xaa
[   29.439068]  [<ffffffff811c02b5>] create_dir+0x70/0xb2
[   29.451011]  [<ffffffff811c05b6>] sysfs_create_dir+0x9d/0xbb
[   29.453076]  [<ffffffff81461f19>] kobject_add_internal+0x11e/0x222
[   29.454405]  [<ffffffff81462220>] kobject_add+0x8b/0xa4
[   29.455543]  [<ffffffff8144b70d>] ? blk_mq_register_disk+0x72/0x18d
[   29.457534]  [<ffffffff8144b7bc>] blk_mq_register_disk+0x121/0x18d
[   29.458956]  [<ffffffff81444464>] blk_register_queue+0xb1/0x121
[   29.470939]  [<ffffffff8144d0b1>] ? disk_part_iter_next+0x27/0x126
[   29.473011]  [<ffffffff8144df8f>] add_disk+0x33b/0x45b
[   29.474129]  [<ffffffff815518fc>] virtblk_probe+0x4d6/0x5da
[   29.475266]  [<ffffffff8153e7e5>] ? driver_probe_device+0x2f7/0x2f7
[   29.477436]  [<ffffffff814e915b>] virtio_dev_probe+0xba/0xf9
[   29.478740]  [<ffffffff8153e60a>] driver_probe_device+0x11c/0x2f7
[   29.490567]  [<ffffffff8153e848>] __driver_attach+0x63/0x86
[   29.491880]  [<ffffffff8153c868>] bus_for_each_dev+0x5f/0x91
[   29.493903]  [<ffffffff8153df8d>] driver_attach+0x1e/0x20
[   29.495102]  [<ffffffff8153dbbe>] bus_add_driver+0x11d/0x241
[   29.497041]  [<ffffffff8153ee52>] driver_register+0x96/0x11c
[   29.498262]  [<ffffffff82358d87>] ? loop_init+0x147/0x147
[   29.499433]  [<ffffffff814e9303>] register_virtio_driver+0x2b/0x30
[   29.511350]  [<ffffffff82358ddb>] init+0x54/0x8b
[   29.513134]  [<ffffffff8100028d>] do_one_initcall+0xa0/0x137
[   29.514312]  [<ffffffff82314e1a>] kernel_init_freeable+0x13c/0x1cb
[   29.515532]  [<ffffffff823146ee>] ? do_early_param+0x8d/0x8d
[   29.517357]  [<ffffffff8197dee9>] ? rest_init+0xdd/0xdd
[   29.518558]  [<ffffffff8197def7>] kernel_init+0xe/0xdb
[   29.527871]  [<ffffffff819a641c>] ret_from_fork+0x7c/0xb0
[   29.529838]  [<ffffffff8197dee9>] ? rest_init+0xdd/0xdd
[   29.531584] ---[ end trace dfaab53c7b1f7bcc ]---

git bisect start 10adcdf8d7877e87f3084678709fe74f1e42a25b v3.9 --
git bisect good 1aad08dc571604ebe473e2a187f0f7b211ae6c3f  # 18:48   1366+  Merge tag 'pm+acpi-3.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
git bisect good 138de5158fc6968b483ef2a7aaf59ad92c362c4c  # 19:57    170+  [MEDIA] Remove duplicate entry for tuner-3036.
git bisect good 61143925693ceef11350b385aa1c685091277cfc  # 20:06    720+  ARM: shmobile: r8a7778: use fixed ratio clock
git bisect good c2da33a672cb50a043751c68f1c01309f260617f  # 20:46    170+  arm64: KVM: Basic ESR_EL2 helpers and vcpu register access
git bisect  bad a486357b0ce26a04a496156e2e4ce9595cf495d9  # 20:49      0-  block: Add missing blk_mq_free_request for scsi-ioctl -> SG_IO
git bisect  bad 7605530fdbe18d69bf84855350c53eb93e8616af  # 20:49      0-  scsi: Make scsi_softirq_done extern for scsi-mq
git bisect good 00060f37d61cce84b05ab265a1d3532fb83b1002  # 20:49    185+  mtip32xx: basic mq support
git bisect good c10a780562ba6664b0766411b7d6924c8d785437  # 00:58    170+  blk-mq: cpu hot plug/unplug fixes
git bisect good 5754ab54c1b28888e9700550585c5729fccbd15f  # 00:58    185+  blk-mq: timeout fixes
git bisect  bad a256ba092ec57213f96059d41ac5473ff92f5e7c  # 00:58      0-  scsi: Split scsi_dispatch_cmd into __scsi_dispatch_cmd setup
git bisect good 5754ab54c1b28888e9700550585c5729fccbd15f  # 01:46    510+  blk-mq: timeout fixes
git bisect  bad 10adcdf8d7877e87f3084678709fe74f1e42a25b  # 01:46      0-  Merge remote-tracking branch 'arm-platforms/kvm-arm64/kvm' into devel-hourly-2013060809
git bisect good 77293e215edef7871a39de4b326f777bc39278ca  # 02:22    510+  Merge branch 'fixes-3.10' of git://git.infradead.org/users/willy/linux-nvme
git bisect good c04efed734409f5a44715b54a6ca1b54b0ccf215  # 03:42    510+  Add linux-next specific files for 20130607

Thanks,
Fengguang