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    SubjectRe: processes hung after sys_renameat, and 'missing' processes
    On Mon, Jun 04, 2012 at 12:28:20AM +0100, Al Viro wrote:

    > Everything in lock_rename() appears to be at lock_rename+0x3e. Unless
    > there's a really huge amount of filesystems on that box, this has to
    > be
    > mutex_lock_nested(&p1->d_inode->i_mutex, I_MUTEX_PARENT);
    > and everything on that sucker is not holding any locks yet. IOW, that's
    > the tail hanging off whatever deadlock is there.

    Er... After another look, probably not - it's ->s_vfs_rename_mutex,
    so we are seeing one cross-directory rename stuck on something with
    all subsequent ones blocked on attempt to grab said mutex.

    The interesting one is the guy stuck at lock_rename+0xc9/0xf0, everything
    else in lock_rename() is the consequence.

     \ /
      Last update: 2012-06-04 02:01    [W:0.021 / U:63.004 seconds]
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