Messages in this thread | | | Date | Thu, 7 Jun 2012 02:29:00 +0100 | From | Al Viro <> | Subject | Re: processes hung after sys_renameat, and 'missing' processes |
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On Wed, Jun 06, 2012 at 09:19:15PM -0400, Dave Jones wrote: > On Wed, Jun 06, 2012 at 05:42:35PM -0700, Linus Torvalds wrote: > > > So Al meant you to test mutex_is_locked(dentry->d_inode->i_mutex) of > > the parents. > > ok, I ended up with.. > > WARN_ON_ONCE(!mutex_is_locked(&target->d_parent->d_inode->i_mutex)); > > if (dentry->d_parent != NULL) != dentry)
->d_parent *never* should be NULL; when dentry is disconnected from the tree (or hadn't been connected to it yet), it points to that dentry itself.
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