On 10/18/2017 12:41 PM, Gang He wrote:
> Hi Junxiao,
>
> The problem looks easy to reproduce?
> Could you share the trigger script/code for this issue?
Please run ocfs2-test multiple reflink test.
Thanks,
Junxiao.
>
>
> Thanks
> Gang
>
>
>>>>
>> Here another recursive lock caught and it caused the cluster hung.
>>
>> #0 [ffff88008e3935a8] __schedule at ffffffff816e4722
>> #1 [ffff88008e393600] schedule at ffffffff816e4dee
>> #2 [ffff88008e393620] schedule_timeout at ffffffff816e7cd5
>> #3 [ffff88008e3936c0] wait_for_completion at ffffffff816e631f
>> #4 [ffff88008e393740] __ocfs2_cluster_lock at ffffffffa05a9111 [ocfs2]
>> #5 [ffff88008e393890] ocfs2_inode_lock_full_nested at ffffffffa05aec14
>> [ocfs2]
>> #6 [ffff88008e393910] ocfs2_inode_lock_tracker at ffffffffa05af02f [ocfs2]
>> #7 [ffff88008e393970] ocfs2_iop_get_acl at ffffffffa0620c92 [ocfs2]
>> #8 [ffff88008e3939d0] get_acl at ffffffff8126ae79
>> #9 [ffff88008e3939f0] posix_acl_create at ffffffff8126b27a
>> #10 [ffff88008e393a20] ocfs2_mknod at ffffffffa05cedcc [ocfs2]
>> #11 [ffff88008e393b60] ocfs2_create at ffffffffa05cfb13 [ocfs2]
>> #12 [ffff88008e393bd0] vfs_create at ffffffff81217338
>> #13 [ffff88008e393c10] lookup_open at ffffffff81217a85
>> #14 [ffff88008e393ca0] do_last at ffffffff8121ac6d
>> #15 [ffff88008e393d30] path_openat at ffffffff8121b112
>> #16 [ffff88008e393df0] do_filp_open at ffffffff8121b53a
>> #17 [ffff88008e393ed0] do_sys_open at ffffffff81209a5a
>> #18 [ffff88008e393f40] sys_open at ffffffff81209bae
>> #19 [ffff88008e393f50] system_call_fastpath at ffffffff816e902e
>>
>> inode lock is got by ocfs2_mknod() before call into posix_acl_create().
>>
>> Signed-off-by: Junxiao Bi <junxiao...@oracle.com>
>> Cc: <sta...@vger.kernel.org>
>> ---
>> fs/ocfs2/namei.c | 14 ++++++++------
>> 1 file changed, 8 insertions(+), 6 deletions(-)
>>
>> diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
>> index 3b0a10d9b36f..f0ee52e600ff 100644
>> --- a/fs/ocfs2/namei.c
>> +++ b/fs/ocfs2/namei.c
>> @@ -260,6 +260,8 @@ static int ocfs2_mknod(struct inode *dir,
>> sigset_t oldset;
>> int did_block_signals = 0;
>> struct ocfs2_dentry_lock *dl = NULL;
>> + int locked;
>> + struct ocfs2_lock_holder oh;
>>
>> trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
>> (unsigned long long)OCFS2_I(dir)->ip_blkno,
>> @@ -274,11 +276,11 @@ static int ocfs2_mknod(struct inode *dir,
>> /* get our super block */
>> osb = OCFS2_SB(dir->i_sb);
>>
>> - status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
>> - if (status < 0) {
>> - if (status != -ENOENT)
>> - mlog_errno(status);
>> - return status;
>> + locked = ocfs2_inode_lock_tracker(dir, &parent_fe_bh, 1, &oh);
>> + if (locked < 0) {
>> + if (locked != -ENOENT)
>> + mlog_errno(locked);
>> + return locked;
>> }
>>
>> if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
>> @@ -462,7 +464,7 @@ static int ocfs2_mknod(struct inode *dir,
>> if (handle)
>> ocfs2_commit_trans(osb, handle);
>>
>> - ocfs2_inode_unlock(dir, 1);
>> + ocfs2_inode_unlock_tracker(dir, 1, &oh, locked);
>> if (did_block_signals)
>> ocfs2_unblock_signals(&oldset);
>>
>> --
>> 1.7.9.5
>>
>>
>> _______________________________________________
>> Ocfs2-devel mailing list
>> Ocfs2-devel@oss.oracle.com
>> https://oss.oracle.com/mailman/listinfo/ocfs2-devel
>
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