Re: fs/dcache.c - BUG: soft lockup - CPU#5 stuck for 22s! [systemd-udevd:1667]

[Al Viro]

On Thu, May 29, 2014 at 09:29:42AM -0700, Linus Torvalds wrote:
> On Thu, May 29, 2014 at 9:23 AM, Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:
> >
> > BTW, lock_parent() might be better off if in contended case it would not
> > bother with rename_lock and did something like this:
> > again:
> 
> Ack. I think that's much better.

Pushed to #for-linus (with dumb braino fixed - it's if (parent != dentry),
not if (parent)).  I'll wait with folding it back into the commit that
introduces lock_parent() until we get testing results...
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