https://github.com/torvalds/linux
Revision c1ea985c710f41e97f1c72c29bbf367375370f0b authored by Ryusuke Konishi on 11 November 2009, 15:13:32 UTC, committed by Ryusuke Konishi on 13 November 2009, 01:33:24 UTC
Will fix the following lock order reversal lockdep detected: ======================================================= [ INFO: possible circular locking dependency detected ] 2.6.32-rc6 #7 ------------------------------------------------------- chcp/30157 is trying to acquire lock: (&nilfs->ns_mount_mutex){+.+.+.}, at: [<fed7cfcc>] nilfs_cpfile_change_cpmode+0x46/0x752 [nilfs2] but task is already holding lock: (&nilfs->ns_segctor_sem){++++.+}, at: [<fed7ca32>] nilfs_transaction_begin+0xba/0x110 [nilfs2] which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&nilfs->ns_segctor_sem){++++.+}: [<c105799c>] __lock_acquire+0x109c/0x139d [<c1057d26>] lock_acquire+0x89/0xa0 [<c14151e2>] down_read+0x31/0x45 [<fed6d77b>] nilfs_attach_checkpoint+0x8f/0x16b [nilfs2] [<fed6e393>] nilfs_get_sb+0x3e7/0x653 [nilfs2] [<c10c0ccb>] vfs_kern_mount+0x8b/0x124 [<c10c0db2>] do_kern_mount+0x37/0xc3 [<c10d7517>] do_mount+0x64d/0x69d [<c10d75cd>] sys_mount+0x66/0x95 [<c1002a14>] sysenter_do_call+0x12/0x32 -> #1 (&type->s_umount_key#31/1){+.+.+.}: [<c105799c>] __lock_acquire+0x109c/0x139d [<c1057d26>] lock_acquire+0x89/0xa0 [<c104c0f3>] down_write_nested+0x34/0x52 [<c10c08fe>] sget+0x22e/0x389 [<fed6e133>] nilfs_get_sb+0x187/0x653 [nilfs2] [<c10c0ccb>] vfs_kern_mount+0x8b/0x124 [<c10c0db2>] do_kern_mount+0x37/0xc3 [<c10d7517>] do_mount+0x64d/0x69d [<c10d75cd>] sys_mount+0x66/0x95 [<c1002a14>] sysenter_do_call+0x12/0x32 -> #0 (&nilfs->ns_mount_mutex){+.+.+.}: [<c1057727>] __lock_acquire+0xe27/0x139d [<c1057d26>] lock_acquire+0x89/0xa0 [<c1414d63>] mutex_lock_nested+0x41/0x23e [<fed7cfcc>] nilfs_cpfile_change_cpmode+0x46/0x752 [nilfs2] [<fed801b2>] nilfs_ioctl+0x11a/0x7da [nilfs2] [<c10cca12>] vfs_ioctl+0x27/0x6e [<c10ccf93>] do_vfs_ioctl+0x491/0x4db [<c10cd022>] sys_ioctl+0x45/0x5f [<c1002a14>] sysenter_do_call+0x12/0x32 Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
1 parent 156171c
Tip revision: c1ea985c710f41e97f1c72c29bbf367375370f0b authored by Ryusuke Konishi on 11 November 2009, 15:13:32 UTC
nilfs2: fix lock order reversal in chcp operation
nilfs2: fix lock order reversal in chcp operation
Tip revision: c1ea985
File | Mode | Size |
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Documentation | ||
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crypto | ||
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firmware | ||
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lib | ||
mm | ||
net | ||
samples | ||
scripts | ||
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sound | ||
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usr | ||
virt | ||
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