On Sat, Mar 29, 2014 at 06:31:09PM -0400, Dave Jones wrote: > Not sure if I've reported this already (it looks familiar, though I've not > managed > to find it in my sent mail folder). This is rc8 + a diff to fix the stack > usage reports > I was seeing (diff at http://paste.fedoraproject.org/89854/13210913/raw) > > ====================================================== > [ INFO: possible circular locking dependency detected ] > 3.14.0-rc8+ #153 Not tainted > ------------------------------------------------------- > git/32710 is trying to acquire lock: > (&(&ip->i_lock)->mr_lock){++++.+}, at: [<ffffffffc03bd782>] > xfs_ilock+0x122/0x250 [xfs] > > but task is already holding lock: > (&mm->mmap_sem){++++++}, at: [<ffffffffae7b816a>] > __do_page_fault+0x14a/0x610 > > which lock already depends on the new lock.
filldir on a directory inode vs page fault on regular file. Known issue, definitely a false positive. We have to change locking algorithms to avoid such deficiencies of lockdep (a case of "lockdep considered harmful", perhaps?) so it's not something I'm about to rush... Cheers, Dave. -- Dave Chinner da...@fromorbit.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
