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Date: Fri, 21 Mar 2014 17:46:46 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Al Viro <viro@...iv.linux.org.uk>
Cc: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [mnt_hash] BUG: Dentry ffff88000e6559c0{i=2010,n=/} still in use (2)
[unmount of tmpfs tmpfs]
Hi Al,
I got the below dmesg and the first bad commit is
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git
commit 3d54406d3c64c0e7e092f8299c460ebe0aea9795
Author: Al Viro <viro@...iv.linux.org.uk>
AuthorDate: Thu Mar 20 21:10:51 2014 -0400
Commit: Al Viro <viro@...iv.linux.org.uk>
CommitDate: Thu Mar 20 21:10:51 2014 -0400
switch mnt_hash to hlist
Cc: stable@...r.kernel.org
Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
+----------------------------------------------------------+------------+------------+------------+
| | 6a92faa1d6 | 3d54406d3c | 3d54406d3c |
+----------------------------------------------------------+------------+------------+------------+
| boot_successes | 30 | 0 | 0 |
| boot_failures | 50 | 19 | 19 |
| page_allocation_failure:order:,mode | 46 | | |
| BUG:kernel_test_hang | 10 | | |
| backtrace:vfs_write | 46 | | |
| backtrace:SyS_write | 46 | | |
| WARNING:CPU:PID:at_kernel/workqueue.c:process_one_work() | 1 | | |
| backtrace:warn_slowpath_null | 1 | | |
| BUG:soft_lockup-CPU_stuck_for_s | 3 | | |
| RIP:_raw_spin_unlock_irqrestore | 3 | | |
| Kernel_panic-not_syncing:softlockup:hung_tasks | 3 | | |
| backtrace:schedule_timeout | 1 | | |
| backtrace:smpboot_thread_fn | 1 | | |
| BUG:Dentry_i=c,n=/still_in_use()unmount_of_tmpfs_tmpfs | 0 | 1 | 1 |
| kernel_BUG_at_fs/dcache.c | 0 | 19 | 19 |
| invalid_opcode:SMP | 0 | 19 | 19 |
| RIP:umount_collect | 0 | 19 | 19 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 19 | 19 |
| backtrace:do_umount | 0 | 19 | 19 |
| backtrace:SyS_umount | 0 | 19 | 19 |
| BUG:Dentry_i=d0a,n=/still_in_use()unmount_of_tmpfs_tmpfs | 0 | 1 | 1 |
| BUG:Dentry_i=d25,n=/still_in_use()unmount_of_tmpfs_tmpfs | 0 | 1 | 1 |
| BUG:Dentry_i=e,n=/still_in_use()unmount_of_tmpfs_tmpfs | 0 | 1 | 1 |
| BUG:Dentry_i=f20,n=/still_in_use()unmount_of_tmpfs_tmpfs | 0 | 1 | 1 |
| BUG:Dentry_i=,n=/still_in_use()unmount_of_tmpfs_tmpfs | 0 | 5 | 5 |
| BUG:Dentry_i=fa6,n=/still_in_use()unmount_of_tmpfs_tmpfs | 0 | 1 | 1 |
| BUG:Dentry_i=cfb,n=/still_in_use()unmount_of_tmpfs_tmpfs | 0 | 1 | 1 |
| BUG:Dentry_i=d53,n=/still_in_use()unmount_of_tmpfs_tmpfs | 0 | 1 | 1 |
| BUG:Dentry_i=d51,n=/still_in_use()unmount_of_tmpfs_tmpfs | 0 | 1 | 1 |
| BUG:Dentry_i=f,n=/still_in_use()unmount_of_tmpfs_tmpfs | 0 | 2 | 2 |
| BUG:Dentry_i=a,n=/still_in_use()unmount_of_tmpfs_tmpfs | 0 | 1 | 1 |
| BUG:Dentry_i=d1,n=/still_in_use()unmount_of_tmpfs_tmpfs | 0 | 1 | 1 |
| BUG:Dentry_i=ffc,n=/still_in_use()unmount_of_tmpfs_tmpfs | 0 | 1 | 1 |
+----------------------------------------------------------+------------+------------+------------+
[ 1.533068] tsc: Refined TSC clocksource calibration: 2693.428 MHz
Kernel tests: Boot OK!
[ 2.096054] input: ImExPS/2 Generic Explorer Mouse as /devices/platform/i8042/serio1/input/input3
[ 67.795181] BUG: Dentry ffff88000e6559c0{i=2010,n=/} still in use (2) [unmount of tmpfs tmpfs]
[ 67.797804] ------------[ cut here ]------------
git bisect start 3d54406d3c64c0e7e092f8299c460ebe0aea9795 887843961c4b4681ee993c36d4997bf4b4aa8253 --
git bisect good 6c310c7e4f544762057b4fce4f7b492b70f15a23 # 11:00 20+ 2 keep shadowed vfsmounts together
git bisect good 8cefb970aa3b94377554d5083611768ff257ce19 # 11:46 20+ 12 resizable namespace.c hashes
git bisect good 6a92faa1d647d78ec54506d783c5a7ce503b4843 # 12:37 20+ 7 smarter propagate_mnt()
# first bad commit: [3d54406d3c64c0e7e092f8299c460ebe0aea9795] switch mnt_hash to hlist
git bisect good 6a92faa1d647d78ec54506d783c5a7ce503b4843 # 15:39 60+ 50 smarter propagate_mnt()
git bisect bad 3d54406d3c64c0e7e092f8299c460ebe0aea9795 # 15:39 0- 19 switch mnt_hash to hlist
git bisect good 08edb33c4e1b810011f21d7705811b7b9a0535f0 # 15:47 60+ 2 Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
git bisect good 06ed26d1de59ce7cbbe68378b7e470be169750e5 # 16:16 60+ 0 Add linux-next specific files for 20140321
Thanks,
Fengguang
View attachment "dmesg-yocto-inn-40:20140321093724:x86_64-rhel::" of type "text/plain" (53616 bytes)
View attachment "x86_64-rhel-3d54406d3c64c0e7e092f8299c460ebe0aea9795-kernel-BUG-at-fs-dcache-c-55176.log" of type "text/plain" (11332 bytes)
View attachment "config-3.14.0-rc7-00038-g3d54406" of type "text/plain" (122679 bytes)
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