Re: VFS deadlock ?

From: Dave Jones
Date: Thu Mar 21 2013 - 18:13:06 EST

On Thu, Mar 21, 2013 at 02:18:15PM -0700, Linus Torvalds wrote:
> On Thu, Mar 21, 2013 at 2:02 PM, Dave Jones <davej@xxxxxxxxxx> wrote:
> >
> > here we go...
> >
> > WARNING: at fs/namei.c:2335 lock_rename+0x156/0x160()
> > p1=irda p2=irda
> Ok, good. I ssupect it's /proc or /sys, we do have that entry there.
> But in fact I suspect we do want the parent name after all, because I
> think we have multiple "irda" directories. There's the one in
> /proc/net/ (added by net/irda/irproc.c), and there's a sysctl CTL_DIR
> "irda" directory (kernel/sysctl_binary.c). And there might even be a
> few other ones in /sys too, thanks to the ldisc called "irda" etc.
> I don't see where the shared inode comes from, but I suspect that
> would be easier to guess if we actually see which particular case it
> ends up being..

it's not just irda fwiw..

p1=rpc p2=rpc p1parent=net p2parent=net

not sure why the printk with Al's last debugging info didn't print out..


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