On Thu, Mar 06, 2014 at 09:15:51PM -0800, Paul E. McKenney wrote: > On Fri, Mar 07, 2014 at 09:28:47AM +0800, Fengguang Wu wrote: > > Greetings, > > > > I got the below dmesg and the first bad commit is > > > > git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/dev > > commit 1f9c26968e1a501f3a839603c9633f21abca65b3 > > Author: Paul E. McKenney > > AuthorDate: Tue Mar 4 11:03:21 2014 -0800 > > Commit: Paul E. McKenney > > CommitDate: Wed Mar 5 07:49:28 2014 -0800 > > > > torture: Increase stutter-end intensity > > Hmmm... A bit too intense, you say? I will tone it down a bit. Maybe too intense, or it helps trigger some other kernel hang bug in this bisect: +-------------------------------------+------------+------------+ | | 1f9c26968e | d478a960ed | +-------------------------------------+------------+------------+ | boot_successes | 9 | 2 | | boot_failures | 76 | 17 | | BUG:kernel_test_hang | 54 | 15 | | BUG:kernel_boot_hang | 22 | 2 | | page_allocation_failure:order:,mode | 2 | | | backtrace:vmalloc | 2 | | | backtrace:SyS_init_module | 2 | | +-------------------------------------+------------+------------+ [ 14.243909] can: request_module (can-proto-5) failed. [ 14.259351] can: request_module (can-proto-3) failed. BUG: kernel test hang Elapsed time: 3605 Unfortunately there's no much information in the dmesg - the kernel just hangs there. git bisect start d478a960edf1ea61ca31a07a48a8771f043dba78 0414855fdc4a40da05221fc6062cccbc0c30f169 -- git bisect good 6c2191ad9b6225860eef70a77d300c3d5ad39182 # 14:31 25+ 0 Merge 'digsig/for-mimi' into devel-hourly-2014030618 git bisect bad 8d06d39b2d95c1c3f10ce3d1969e1e381935bbaf # 15:35 14- 2 Merge 'rcu/rcu/dev' into devel-hourly-2014030618 git bisect good 6845af00920e6b0d6e252c44784aaca3b0d2f42f # 15:46 85+ 0 Merge 'drm-intel/drm-intel-nightly' into devel-hourly-2014030618 git bisect good e5a16a9dbec8844bbd4b35ba52fef5c5f22e1e6a # 15:54 85+ 0 Merge 'ath6kl/ath-next-test' into devel-hourly-2014030618 git bisect good 5c709b0d8abc5dac4d7323fe6e3fdc8e6c4d0e59 # 16:11 85+ 0 Merge 'tip/x86/efi' into devel-hourly-2014030618 git bisect good fbe938e4f6c837ca17c284c001b43bb21d5ca389 # 16:20 85+ 0 Merge 'arm-soc/next/drivers' into devel-hourly-2014030618 git bisect good b46f358ae5e3558a9072f0354128d5749a584d01 # 19:16 85+ 0 rcutorture: Place kvm-test-1-run.sh output into res directory git bisect good f5604f67fe8cbd6f2088b20b9463f721aa613d4b # 19:36 85+ 0 Merge branch 'torture.2014.02.23a' into HEAD git bisect good dd35b81c341c685bafd15bc9a6bfa79584e07b07 # 19:54 85+ 0 torture: Rename RCU_BUILDONLY to TORTURE_BUILDONLY git bisect good 8864f0996e8b7f07a536aa07553c4461cd5f4211 # 20:09 85+ 0 torture: Make "--dryrun script" output self-sufficient git bisect good b2d777a6d9d64929b9701f1905fdeda8fc3cb16d # 20:28 85+ 0 rcutorture: Print negatives for SRCU counter wraparound git bisect good 4c79d7d89902a2e9c96b3db5115af52b3cf94da9 # 23:54 85+ 0 torture: Report diagnostics from qemu git bisect bad 1f9c26968e1a501f3a839603c9633f21abca65b3 # 00:56 31- 23 torture: Increase stutter-end intensity # first bad commit: [1f9c26968e1a501f3a839603c9633f21abca65b3] torture: Increase stutter-end intensity git bisect good 4c79d7d89902a2e9c96b3db5115af52b3cf94da9 # 01:05 990+ 0 torture: Report diagnostics from qemu git bisect bad d478a960edf1ea61ca31a07a48a8771f043dba78 # 01:05 0- 17 0day head guard for 'devel-hourly-2014030618' git bisect good 78e760ddde020af97bd84c3ec2199cd3832fdb2e # 01:23 990+ 0 Revert "torture: Increase stutter-end intensity" git bisect good c3bebc71c4bcdafa24b506adf0c1de3c1f77e2e0 # 01:56 990+ 0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net git bisect bad 1b0a7e3263168a06d3858798e48c5a21d1c78d3c # 03:23 971- 10 Add linux-next specific files for 20140307 Thanks, Fengguang