git checkout b28a960c42fcd9cfc987441fa6d1c1a471f0f9ed ls -a /kernel-tests/run-queue/kvm/i386-randconfig-nh0-02162347/linux-devel:devel-hourly-2014021619:b28a960c42fcd9cfc987441fa6d1c1a471f0f9ed:bisect-linux 2014-02-17 12:36:37: cmd_fail: '/bin/grep' '-r' '--include=dmesg-*' '-s' '-l' 'WARNING: .* at .* smp_call_function_single+0x' '/kernel/i386-randconfig-nh0-02162347/b28a960c42fcd9cfc987441fa6d1c1a471f0f9ed' , ret=2, ref: /kernel-tests/failed-cmd/bee-grep-kbuild.log 2014-02-17-12:36:37 b28a960c42fcd9cfc987441fa6d1c1a471f0f9ed compiling 151 real 2540 user 127 sys 1765.77% cpu i386-randconfig-nh0-02162347 2014-02-17-12:39:15 detecting boot state 3.14.0-rc2... 3 12 15 16. 18. 19 20 SUCCESS bisect: good commit b28a960c42fcd9cfc987441fa6d1c1a471f0f9ed git bisect start 97162c1b407ab8dbcc637c316b772dd0572deddc b28a960c42fcd9cfc987441fa6d1c1a471f0f9ed -- /c/kernel-tests/linear-bisect: ["-b", "97162c1b407ab8dbcc637c316b772dd0572deddc", "-g", "b28a960c42fcd9cfc987441fa6d1c1a471f0f9ed", "/c/kernel-tests/bisect-test-boot-failure.sh", "/kernel-tests/linux/obj-bisect"] Bisecting: 1592 revisions left to test after this (roughly 11 steps) [fac377044fb04ec759db1dd84fab3312b718541a] Merge 'asoc/topic/io' into devel-hourly-2014021619 running /c/kernel-tests/bisect-test-boot-failure.sh /kernel-tests/linux/obj-bisect ls -a /kernel-tests/run-queue/kvm/i386-randconfig-nh0-02162347/linux-devel:devel-hourly-2014021619:fac377044fb04ec759db1dd84fab3312b718541a:bisect-linux 2014-02-17 12:45:16: cmd_fail: '/bin/grep' '-r' '--include=dmesg-*' '-s' '-l' 'WARNING: .* at .* smp_call_function_single+0x' '/kernel/i386-randconfig-nh0-02162347/fac377044fb04ec759db1dd84fab3312b718541a' , ret=2, ref: /kernel-tests/failed-cmd/bee-grep-kbuild.log 2014-02-17-12:45:16 fac377044fb04ec759db1dd84fab3312b718541a compiling 151 real 2523 user 128 sys 1753.05% cpu i386-randconfig-nh0-02162347 2014-02-17-12:47:53 detecting boot state 3.14.0-rc2-00676-gfac3770... 18... 19 20 SUCCESS Bisecting: 916 revisions left to test after this (roughly 10 steps) [e4a1d2bc3960c559a130db3ca999521c8120fbfb] Merge 'lunn/v3.14-rc1-synology-v2' into devel-hourly-2014021619 running /c/kernel-tests/bisect-test-boot-failure.sh /kernel-tests/linux/obj-bisect ls -a /kernel-tests/run-queue/kvm/i386-randconfig-nh0-02162347/linux-devel:devel-hourly-2014021619:e4a1d2bc3960c559a130db3ca999521c8120fbfb:bisect-linux 2014-02-17 12:52:24: cmd_fail: '/bin/grep' '-r' '--include=dmesg-*' '-s' '-l' 'WARNING: .* at .* smp_call_function_single+0x' '/kernel/i386-randconfig-nh0-02162347/e4a1d2bc3960c559a130db3ca999521c8120fbfb' , ret=2, ref: /kernel-tests/failed-cmd/bee-grep-kbuild.log 2014-02-17-12:52:24 e4a1d2bc3960c559a130db3ca999521c8120fbfb compiling 150 real 2463 user 121 sys 1722.38% cpu i386-randconfig-nh0-02162347 2014-02-17-12:55:00 detecting boot state 3.14.0-rc2-01275-ge4a1d2b.. 1 13 19.... 20 SUCCESS Bisecting: 317 revisions left to test after this (roughly 9 steps) [df2a05d9d2e5ec7aaa7f2912bf531955525f6155] Merge 'cgroup/review-post-kernfs-conversion' into devel-hourly-2014021619 running /c/kernel-tests/bisect-test-boot-failure.sh /kernel-tests/linux/obj-bisect ls -a /kernel-tests/run-queue/kvm/i386-randconfig-nh0-02162347/linux-devel:devel-hourly-2014021619:df2a05d9d2e5ec7aaa7f2912bf531955525f6155:bisect-linux 2014-02-17 13:00:01: cmd_fail: '/bin/grep' '-r' '--include=dmesg-*' '-s' '-l' 'WARNING: .* at .* smp_call_function_single+0x' '/kernel/i386-randconfig-nh0-02162347/df2a05d9d2e5ec7aaa7f2912bf531955525f6155' , ret=2, ref: /kernel-tests/failed-cmd/bee-grep-kbuild.log 2014-02-17-13:00:01 df2a05d9d2e5ec7aaa7f2912bf531955525f6155 compiling 103 real 1291 user 62 sys 1314.80% cpu i386-randconfig-nh0-02162347 2014-02-17-13:01:49 detecting boot state 3.14.0-rc2-01337-gdf2a05d. TEST FAILURE [ 9.182128] ide-cd driver 5.00 [ 9.182905] ide-cd: hdc: ATAPI 4X DVD-ROM drive, 512kB Cache [ 9.183492] cdrom: Uniform CD-ROM driver Revision: 3.20 [ 9.208602] BUG: unable to handle kernel NULL pointer dereference at 0000001c [ 9.209438] IP: [<8130f40d>] kernfs_path_locked+0x7d/0xc0 [ 9.210059] *pde = 00000000 [ 9.210447] Oops: 0000 [#1] SMP [ 9.211107] CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 3.14.0-rc2-01337-gdf2a05d #123 [ 9.212224] Workqueue: events_freezable_power_ disk_events_workfn [ 9.213082] task: 801c5560 ti: 801d6000 task.ti: 801d6000 [ 9.213746] EIP: 0060:[<8130f40d>] EFLAGS: 00010046 CPU: 0 [ 9.214328] EIP is at kernfs_path_locked+0x7d/0xc0 [ 9.214828] EAX: 00000000 EBX: 00000000 ECX: 801d7c34 EDX: 801d7bb4 [ 9.215191] ESI: 00000046 EDI: 801d7c33 EBP: 801d7b68 ESP: 801d7b58 [ 9.215191] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 [ 9.215191] CR0: 8005003b CR2: 0000001c CR3: 03b7c000 CR4: 00000690 [ 9.215191] Stack: [ 9.215191] 801d7bb4 00000000 00000046 801d7bb4 801d7b80 8130ff29 00000080 92d06690 [ 9.215191] 92d5fad8 00000018 801d7c40 8199be0a 00000002 00000001 00000000 8199bbd0 [ 9.215191] 92d5fad8 00000000 00000001 801c5560 92d5fc24 92da56f8 92d065f0 81997e50 [ 9.215191] Call Trace: [ 9.215191] [<8130ff29>] kernfs_path+0x49/0x80 [ 9.215191] [<8199be0a>] cfq_find_alloc_queue+0x3fa/0x620 [ 9.215191] [<8199bbd0>] ? cfq_find_alloc_queue+0x1c0/0x620 [ 9.215191] [<81997e50>] ? cfq_put_request+0x220/0x220 [ 9.215191] [<81118255>] ? __lock_acquire.isra.19+0x3e5/0xca0 [ 9.215191] [<8101e88d>] ? __save_stack_address+0xd/0xd0 [ 9.215191] [<8199c225>] ? cfq_set_request+0x85/0x740 [ 9.215191] [<8111e63e>] ? do_raw_spin_lock+0xe/0x2e0 [ 9.215191] [<8199c0b5>] cfq_get_queue+0x85/0x170 [ 9.215191] [<8199c577>] cfq_set_request+0x3d7/0x740 [ 9.215191] [<81966b58>] ? ioc_create_icq+0x188/0x270 [ 9.215191] [<819a752d>] ? radix_tree_insert+0xad/0x440 [ 9.215191] [<8111e999>] ? do_raw_spin_unlock+0x9/0x140 [ 9.215191] [<82e20e8d>] ? _raw_spin_unlock_irq+0x6d/0xc0 [ 9.215191] [<8199c1a0>] ? cfq_get_queue+0x170/0x170 [ 9.215191] [<81951acd>] elv_set_request+0x3d/0x70 [ 9.215191] [<819593f9>] get_request+0x6d9/0xf00 [ 9.215191] [<81958d6b>] ? get_request+0x4b/0xf00 [ 9.215191] [<81107630>] ? __wake_up_common+0xd0/0xd0 [ 9.215191] [<8195bacd>] blk_get_request+0xfd/0x200 [ 9.215191] [<81d35ba8>] ide_cd_queue_pc+0x58/0x300 [ 9.215191] [<81118255>] ? __lock_acquire.isra.19+0x3e5/0xca0 [ 9.215191] [<810f9ba9>] ? dequeue_task_fair+0x379/0x9b0 [ 9.215191] [<81d35f8c>] cdrom_check_status+0x8c/0xb0 [ 9.215191] [<81d3797f>] ide_cdrom_check_events_real+0x3f/0x70 [ 9.215191] [<827a1ae4>] cdrom_check_events+0x24/0x50 [ 9.215191] [<81d33a46>] idecd_check_events+0x26/0x40 [ 9.215191] [<819759cb>] disk_check_events+0x4b/0x1f0 [ 9.215191] [<81975b96>] disk_events_workfn+0x26/0x40 [ 9.215191] [<810c0a0a>] process_one_work+0x29a/0x9d0 [ 9.215191] [<810c0917>] ? process_one_work+0x1a7/0x9d0 [ 9.215191] [<8111e63e>] ? do_raw_spin_lock+0xe/0x2e0 [ 9.215191] [<810c1947>] worker_thread+0x2c7/0x770 [ 9.215191] [<810c1680>] ? rescuer_thread+0x540/0x540 [ 9.215191] [<810cde25>] kthread+0x115/0x160 [ 9.215191] [<82e2317b>] ret_from_kernel_thread+0x1b/0x30 [ 9.215191] [<810cdd10>] ? __kthread_unpark+0xd0/0xd0 [ 9.215191] Code: 2f 8b 5b 18 85 db 74 4f 83 05 b8 3a 09 84 01 83 15 bc 3a 09 84 00 8b 43 18 85 c0 74 3a 83 05 c0 3a 09 84 01 83 15 c4 3a 09 84 00 <8b> 43 1c 89 fe e8 f9 5d 6a 00 2b 75 f0 89 c1 8d 40 01 39 c6 7d [ 9.215191] EIP: [<8130f40d>] kernfs_path_locked+0x7d/0xc0 SS:ESP 0068:801d7b58 [ 9.215191] CR2: 000000000000001c [ 9.215191] ---[ end trace 9bb20527a535e5e9 ]--- [ 9.215191] note: kworker/0:1[24] exited with preempt_count 3 /kernel/i386-randconfig-nh0-02162347/df2a05d9d2e5ec7aaa7f2912bf531955525f6155/dmesg-quantal-athens-12:20140217130210:i386-randconfig-nh0-02162347:3.14.0-rc2-01337-gdf2a05d:123 /kernel/i386-randconfig-nh0-02162347/df2a05d9d2e5ec7aaa7f2912bf531955525f6155/dmesg-quantal-athens-30:20140217130215:i386-randconfig-nh0-02162347:3.14.0-rc2-01337-gdf2a05d:123 /kernel/i386-randconfig-nh0-02162347/df2a05d9d2e5ec7aaa7f2912bf531955525f6155/dmesg-quantal-athens-59:20140217130210:i386-randconfig-nh0-02162347:3.14.0-rc2-01337-gdf2a05d:123 /kernel/i386-randconfig-nh0-02162347/df2a05d9d2e5ec7aaa7f2912bf531955525f6155/dmesg-quantal-xian-16:20140217130210:i386-randconfig-nh0-02162347:3.14.0-rc2-01337-gdf2a05d:123 /kernel/i386-randconfig-nh0-02162347/df2a05d9d2e5ec7aaa7f2912bf531955525f6155/dmesg-yocto-xian-20:20140217130210:i386-randconfig-nh0-02162347:3.14.0-rc2-01337-gdf2a05d:123 /kernel/i386-randconfig-nh0-02162347/df2a05d9d2e5ec7aaa7f2912bf531955525f6155/dmesg-yocto-xian-63:20140217130207:i386-randconfig-nh0-02162347:3.14.0-rc2-01337-gdf2a05d:123 /kernel/i386-randconfig-nh0-02162347/df2a05d9d2e5ec7aaa7f2912bf531955525f6155/dmesg-quantal-cairo-54:20140217130218:i386-randconfig-nh0-02162347:3.14.0-rc2-01337-gdf2a05d:123 0:7:7 all_good:bad:all_bad boots 2014-02-17 13:02:20 REPEAT COUNT: 20 # /kernel-tests/linux/obj-bisect/.repeat Bisecting: 62 revisions left to test after this (roughly 6 steps) [542b836903f8aa533efc48c0d4b269303f14885e] Merge 'input/for-linus' into devel-hourly-2014021619 running /c/kernel-tests/bisect-test-boot-failure.sh /kernel-tests/linux/obj-bisect ls -a /kernel-tests/run-queue/kvm/i386-randconfig-nh0-02162347/linux-devel:devel-hourly-2014021619:542b836903f8aa533efc48c0d4b269303f14885e:bisect-linux 2014-02-17 13:02:20: cmd_fail: '/bin/grep' '-r' '--include=dmesg-*' '-s' '-l' 'WARNING: .* at .* smp_call_function_single+0x' '/kernel/i386-randconfig-nh0-02162347/542b836903f8aa533efc48c0d4b269303f14885e' , ret=2, ref: /kernel-tests/failed-cmd/bee-grep-kbuild.log 2014-02-17-13:02:20 542b836903f8aa533efc48c0d4b269303f14885e compiling 95 real 1067 user 48 sys 1173.45% cpu i386-randconfig-nh0-02162347 2014-02-17-13:04:02 detecting boot state 3.14.0-rc2-01288-g542b836... 11 20 SUCCESS Bisecting: 49 revisions left to test after this (roughly 6 steps) [3a24395f59305e7995690e65e5593082ae8d9c1b] Merge 'target/master' into devel-hourly-2014021619 running /c/kernel-tests/bisect-test-boot-failure.sh /kernel-tests/linux/obj-bisect ls -a /kernel-tests/run-queue/kvm/i386-randconfig-nh0-02162347/linux-devel:devel-hourly-2014021619:3a24395f59305e7995690e65e5593082ae8d9c1b:bisect-linux 2014-02-17 13:06:32: cmd_fail: '/bin/grep' '-r' '--include=dmesg-*' '-s' '-l' 'WARNING: .* at .* smp_call_function_single+0x' '/kernel/i386-randconfig-nh0-02162347/3a24395f59305e7995690e65e5593082ae8d9c1b' , ret=2, ref: /kernel-tests/failed-cmd/bee-grep-kbuild.log 2014-02-17-13:06:32 3a24395f59305e7995690e65e5593082ae8d9c1b compiling 51 real 86 user 4 sys 176.98% cpu i386-randconfig-nh0-02162347 2014-02-17-13:07:29 detecting boot state 3.14.0-rc2-01298-g3a24395.. 4 20 SUCCESS linear-bisect: bad branch may be cgroup/review-post-kernfs-conversion linear-bisect: handle over to git bisect linear-bisect: git bisect start df2a05d9d2e5ec7aaa7f2912bf531955525f6155 3a24395f59305e7995690e65e5593082ae8d9c1b -- Previous HEAD position was 3a24395... Merge 'target/master' into devel-hourly-2014021619 HEAD is now at 5e30025... Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Bisecting: 19 revisions left to test after this (roughly 4 steps) [ace2bee8135a3dc725958b8d08c55ee9df813d39] cgroup: introduce cgroup_tree_mutex linear-bisect: git bisect run /c/kernel-tests/bisect-test-boot-failure.sh /kernel-tests/linux/obj-bisect running /c/kernel-tests/bisect-test-boot-failure.sh /kernel-tests/linux/obj-bisect ls -a /kernel-tests/run-queue/kvm/i386-randconfig-nh0-02162347/linux-devel:devel-hourly-2014021619:ace2bee8135a3dc725958b8d08c55ee9df813d39:bisect-linux 2014-02-17 13:09:34: cmd_fail: '/bin/grep' '-r' '--include=dmesg-*' '-s' '-l' 'WARNING: .* at .* smp_call_function_single+0x' '/kernel/i386-randconfig-nh0-02162347/ace2bee8135a3dc725958b8d08c55ee9df813d39' , ret=2, ref: /kernel-tests/failed-cmd/bee-grep-kbuild.log 2014-02-17-13:09:34 ace2bee8135a3dc725958b8d08c55ee9df813d39 compiling 150 real 2535 user 129 sys 1776.96% cpu i386-randconfig-nh0-02162347 2014-02-17-13:12:12 detecting boot state 3.14.0-rc1-00043-gace2bee. 1 TEST FAILURE [ 7.363612] brd: module loaded [ 7.364671] blk-mq: CPU -> queue map [ 7.365272] CPU 0 -> Queue 0 [ 7.365943] BUG: unable to handle kernel paging request at ab930b80 [ 7.367008] IP: [<81972a66>] blk_mq_map_queue+0x26/0x30 [ 7.367913] *pde = 00000000 [ 7.368419] Oops: 0000 [#1] SMP [ 7.369001] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.14.0-rc1-00043-gace2bee #126 [ 7.370226] task: 8001a000 ti: 80024000 task.ti: 80024000 [ 7.371237] EIP: 0060:[<81972a66>] EFLAGS: 00010246 CPU: 0 [ 7.372087] EIP is at blk_mq_map_queue+0x26/0x30 [ 7.372804] EAX: 91bb0b78 EBX: 93a14740 ECX: 91bb0cc8 EDX: 06760002 [ 7.373530] ESI: 91bb1558 EDI: 00000002 EBP: 80025e68 ESP: 80025e54 [ 7.373530] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 [ 7.373530] CR0: 8005003b CR2: ab930b80 CR3: 03b78000 CR4: 00000690 [ 7.373530] Stack: [ 7.373530] 8196f2b3 91bb0cd8 91bb1558 00000041 91bc6180 80025ee4 81973b1f 00000000 [ 7.373530] 80025e84 819b723a 91bb0ac8 91bb2474 ffffffff 00000001 83b6c740 91bb0b78 [ 7.373530] 00000001 838172c0 91bb1558 00000041 91bb23b8 00000001 00000000 00000000 [ 7.373530] Call Trace: [ 7.373530] [<8196f2b3>] ? blk_mq_map_swqueue+0x93/0xf0 [ 7.373530] [<81973b1f>] blk_mq_init_queue+0xf6f/0x10b0 [ 7.373530] [<819b723a>] ? memset+0xa/0x40 [ 7.373530] [<83ab2424>] null_init+0x44b/0x7a6 [ 7.373530] [<81a2bde6>] ? __pci_register_driver+0x66/0x80 [ 7.373530] [<83ab1fd9>] ? rsxx_core_init+0xd5/0xd5 [ 7.373530] [<83a286f3>] do_one_initcall+0xf6/0x222 [ 7.373530] [<810ca646>] ? parameq+0x26/0x100 [ 7.373530] [<819b7799>] ? strlen+0x9/0x40 [ 7.373530] [<83a27763>] ? repair_env_string+0x32/0xd3 [ 7.373530] [<810caa0b>] ? parse_args+0x2eb/0x5f0 [ 7.373530] [<83a28a78>] kernel_init_freeable+0x259/0x3e1 [ 7.373530] [<83a27731>] ? do_early_param+0x131/0x131 [ 7.373530] [<82de7c0e>] kernel_init+0x1e/0x230 [ 7.373530] [<82e1f0bb>] ret_from_kernel_thread+0x1b/0x30 [ 7.373530] [<82de7bf0>] ? rest_init+0x1a0/0x1a0 [ 7.373530] Code: 00 8d 74 26 00 55 89 e5 e8 f8 cb 4a 01 83 05 b0 9a 26 84 01 83 15 b4 9a 26 84 00 8b 88 b4 00 00 00 8b 80 c0 00 00 00 5d 8b 14 91 <8b> 04 90 c3 8d b6 00 00 00 00 55 89 e5 e8 c8 cb 4a 01 ba d0 80 [ 7.373530] EIP: [<81972a66>] blk_mq_map_queue+0x26/0x30 SS:ESP 0068:80025e54 [ 7.373530] CR2: 00000000ab930b80 [ 7.373530] ---[ end trace 55f452f8492b2f6b ]--- [ 7.373530] ------------[ cut here ]------------ /kernel/i386-randconfig-nh0-02162347/ace2bee8135a3dc725958b8d08c55ee9df813d39/dmesg-yocto-xbm-2:20140217131243:i386-randconfig-nh0-02162347:3.14.0-rc1-00043-gace2bee:126 /kernel/i386-randconfig-nh0-02162347/ace2bee8135a3dc725958b8d08c55ee9df813d39/dmesg-yocto-xbm-2:20140217131303:i386-randconfig-nh0-02162347:3.14.0-rc1-00043-gace2bee:126 1:2:2 all_good:bad:all_bad boots 2014-02-17 13:13:13 REPEAT COUNT: 25 # /kernel-tests/linux/obj-bisect/.repeat Bisecting: 10 revisions left to test after this (roughly 3 steps) [0ab02ca8f887908152d1a96db5130fc661d36a1e] cgroup: protect modifications to cgroup_idr with cgroup_mutex running /c/kernel-tests/bisect-test-boot-failure.sh /kernel-tests/linux/obj-bisect ls -a /kernel-tests/run-queue/kvm/i386-randconfig-nh0-02162347/linux-devel:devel-hourly-2014021619:0ab02ca8f887908152d1a96db5130fc661d36a1e:bisect-linux 2014-02-17 13:13:13: cmd_fail: '/bin/grep' '-r' '--include=dmesg-*' '-s' '-l' 'WARNING: .* at .* smp_call_function_single+0x' '/kernel/i386-randconfig-nh0-02162347/0ab02ca8f887908152d1a96db5130fc661d36a1e' , ret=2, ref: /kernel-tests/failed-cmd/bee-grep-kbuild.log 2014-02-17-13:13:13 0ab02ca8f887908152d1a96db5130fc661d36a1e compiling 140 real 2375 user 114 sys 1768.89% cpu i386-randconfig-nh0-02162347 2014-02-17-13:15:40 detecting boot state 3.14.0-rc1-00008-g0ab02ca... 2 16 23 25 SUCCESS Bisecting: 5 revisions left to test after this (roughly 3 steps) [69e943b7d3c2dcca1087e03e556ac6cb0d4433b4] cgroup: update locking in cgroup_show_options() running /c/kernel-tests/bisect-test-boot-failure.sh /kernel-tests/linux/obj-bisect ls -a /kernel-tests/run-queue/kvm/i386-randconfig-nh0-02162347/linux-devel:devel-hourly-2014021619:69e943b7d3c2dcca1087e03e556ac6cb0d4433b4:bisect-linux 2014-02-17 13:19:10: cmd_fail: '/bin/grep' '-r' '--include=dmesg-*' '-s' '-l' 'WARNING: .* at .* smp_call_function_single+0x' '/kernel/i386-randconfig-nh0-02162347/69e943b7d3c2dcca1087e03e556ac6cb0d4433b4' , ret=2, ref: /kernel-tests/failed-cmd/bee-grep-kbuild.log 2014-02-17-13:19:10 69e943b7d3c2dcca1087e03e556ac6cb0d4433b4 compiling 88 real 1054 user 48 sys 1246.26% cpu i386-randconfig-nh0-02162347 2014-02-17-13:20:44 detecting boot state 3.14.0-rc1-00005-g69e943b... 24 25 SUCCESS Bisecting: 2 revisions left to test after this (roughly 2 steps) [f7cef064aa01a1ac682c1945cc168b878cb118ff] Merge branch 'driver-core-next' into cgroup/for-3.15 running /c/kernel-tests/bisect-test-boot-failure.sh /kernel-tests/linux/obj-bisect ls -a /kernel-tests/run-queue/kvm/i386-randconfig-nh0-02162347/linux-devel:devel-hourly-2014021619:f7cef064aa01a1ac682c1945cc168b878cb118ff:bisect-linux 2014-02-17 13:23:15: cmd_fail: '/bin/grep' '-r' '--include=dmesg-*' '-s' '-l' 'WARNING: .* at .* smp_call_function_single+0x' '/kernel/i386-randconfig-nh0-02162347/f7cef064aa01a1ac682c1945cc168b878cb118ff' , ret=2, ref: /kernel-tests/failed-cmd/bee-grep-kbuild.log 2014-02-17-13:23:15 f7cef064aa01a1ac682c1945cc168b878cb118ff compiling 148 real 2374 user 116 sys 1681.98% cpu i386-randconfig-nh0-02162347 2014-02-17-13:25:49 detecting boot state 3.14.0-rc1-00039-gf7cef06.. 1 15 18 20.. 22 25 SUCCESS Bisecting: 0 revisions left to test after this (roughly 1 step) [5a17f543ed6808e9085063277fe46795dea484bd] cgroup: improve css_from_dir() into css_tryget_from_dir() running /c/kernel-tests/bisect-test-boot-failure.sh /kernel-tests/linux/obj-bisect ls -a /kernel-tests/run-queue/kvm/i386-randconfig-nh0-02162347/linux-devel:devel-hourly-2014021619:5a17f543ed6808e9085063277fe46795dea484bd:bisect-linux 2014-02-17 13:30:49: cmd_fail: '/bin/grep' '-r' '--include=dmesg-*' '-s' '-l' 'WARNING: .* at .* smp_call_function_single+0x' '/kernel/i386-randconfig-nh0-02162347/5a17f543ed6808e9085063277fe46795dea484bd' , ret=2, ref: /kernel-tests/failed-cmd/bee-grep-kbuild.log 2014-02-17-13:30:49 5a17f543ed6808e9085063277fe46795dea484bd compiling 91 real 1062 user 47 sys 1207.99% cpu i386-randconfig-nh0-02162347 2014-02-17-13:32:27 detecting boot state 3.14.0-rc1-00042-g5a17f54.. 2 20 23 25 SUCCESS ace2bee8135a3dc725958b8d08c55ee9df813d39 is the first bad commit commit ace2bee8135a3dc725958b8d08c55ee9df813d39 Author: Tejun Heo Date: Tue Feb 11 11:52:47 2014 -0500 cgroup: introduce cgroup_tree_mutex Currently cgroup uses combination of inode->i_mutex'es and cgroup_mutex for synchronization. With the scheduled kernfs conversion, i_mutex'es will be removed. Unfortunately, just using cgroup_mutex isn't possible. All kernfs file and syscall operations, most of which require grabbing cgroup_mutex, will be called with kernfs active ref held and, if we try to perform kernfs removals under cgroup_mutex, it can deadlock as kernfs_remove() tries to drain the target node. Let's introduce a new outer mutex, cgroup_tree_mutex, which protects stuff used during hierarchy changing operations - cftypes and all the operations which may affect the cgroupfs. It also covers css association and iteration. This allows cgroup_css(), for_each_css() and other css iterators to be called under cgroup_tree_mutex. The new mutex will nest above both kernfs's active ref protection and cgroup_mutex. By protecting tree modifications with a separate outer mutex, we can get rid of the forementioned deadlock condition. Actual file additions and removals now require cgroup_tree_mutex instead of cgroup_mutex. Currently, cgroup_tree_mutex is never used without cgroup_mutex; however, we'll soon add hierarchy modification sections which are only protected by cgroup_tree_mutex. In the future, we might want to make the locking more granular by better splitting the coverages of the two mutexes. For now, this should do. v2: Rebased on top of 0ab02ca8f887 ("cgroup: protect modifications to cgroup_idr with cgroup_mutex"). Signed-off-by: Tejun Heo Acked-by: Li Zefan :040000 040000 379f7a96dc00174635286a08f6bcbd97e40f7aaf ccbfd988ed3037b6cdda617932420162450db9bc M kernel bisect run success ls -a /kernel-tests/run-queue/kvm/i386-randconfig-nh0-02162347/linux-devel:devel-hourly-2014021619:5a17f543ed6808e9085063277fe46795dea484bd:bisect-linux 2014-02-17-13:35:27 5a17f543ed6808e9085063277fe46795dea484bd reuse /kernel/i386-randconfig-nh0-02162347/5a17f543ed6808e9085063277fe46795dea484bd/vmlinuz-3.14.0-rc1-00042-g5a17f54 2014-02-17-13:35:27 detecting boot state . 1. 6 38 55 74 75 SUCCESS ls -a /kernel-tests/run-queue/kvm/i386-randconfig-nh0-02162347/linux-devel:devel-hourly-2014021619:97162c1b407ab8dbcc637c316b772dd0572deddc:bisect-linux TEST FAILURE [ 0.080000] Initializing CPU#1 [ 0.080000] masked ExtINT on CPU#1 [ 0.080000] ------------[ cut here ]------------ [ 0.080000] WARNING: CPU: 1 PID: 0 at arch/x86/kernel/cpu/amd.c:220 init_amd+0xff3/0x1100() /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-quantal-waimea-7:20140217000627:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-quantal-waimea-7:20140217123542:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-quantal-roam-57:20140217000954:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-quantal-roam-44:20140217123757:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-quantal-roam-31:20140217123753:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-yocto-roam-51:20140217123734:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-yocto-roam-25:20140217123803:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-yocto-waimea-11:20140217000612:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-quantal-roam-7:20140217123755:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-quantal-waimea-15:20140217000625:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-yocto-waimea-9:20140217123521:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-quantal-waimea-3:20140217123542:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-yocto-roam-19:20140217000914:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-yocto-roam-8:20140217123721:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-yocto-roam-52:20140217123728:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-yocto-waimea-2:20140217000607:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-yocto-roam-23:20140217000929:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-quantal-waimea-9:20140217000630:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 /kernel/i386-randconfig-nh0-02162347/97162c1b407ab8dbcc637c316b772dd0572deddc/dmesg-yocto-waimea-8:20140217000613:i386-randconfig-nh0-02162347:3.14.0-rc2-01592-g97162c1:6 0:19:19 all_good:bad:all_bad boots HEAD is now at 97162c1 0day head guard for 'devel-hourly-2014021619' ========= upstream ========= Previous HEAD position was 97162c1... 0day head guard for 'devel-hourly-2014021619' HEAD is now at 6d0abec... Linux 3.14-rc3 ls -a /kernel-tests/run-queue/kvm/i386-randconfig-nh0-02162347/linux-devel:devel-hourly-2014021619:6d0abeca3242a88cab8232e4acd7e2bf088f3bc2:bisect-linux 2014-02-17-13:39:31 6d0abeca3242a88cab8232e4acd7e2bf088f3bc2 compiling 2014-02-17-13:42:11 detecting boot state 3.14.0-rc3... 14 28 41 64 68.. 73 75 SUCCESS ========= linux-next ========= Previous HEAD position was 6d0abec... Linux 3.14-rc3 HEAD is now at da8d308... Add linux-next specific files for 20140214 ls -a /kernel-tests/run-queue/kvm/i386-randconfig-nh0-02162347/linux-devel:devel-hourly-2014021619:da8d308fbdb8360078786b3e125238122c4fc611:bisect-linux 2014-02-17-13:48:12 da8d308fbdb8360078786b3e125238122c4fc611 compiling 2014-02-17-13:50:07 da8d308fbdb8360078786b3e125238122c4fc611 SKIP BROKEN BUILD Check erros in /kernel-tests/linux/obj-bisect and /tmp/kernel/i386-randconfig-nh0-02162347/da8d308fbdb8360078786b3e125238122c4fc611