Re: Livelock / softdep_flush "loop"

From: Kris Kennaway <kris_at_obsecurity.org>
Date: Mon, 3 Apr 2006 16:34:03 -0400
On Mon, Apr 03, 2006 at 09:28:08PM +0200, Peter Holm wrote:
> On Sun, Apr 02, 2006 at 08:48:51PM +0000, Tor Egge wrote:
> > > > The enclosed patch might help.
> > > > 
> > > 
> > > I'm testing it right now.
> > 
> > Similarly to the softdepflush process looping in softdep_flush(), the process
> > creating a snapshot might loop in ffs_sync().
> > 
> 
> I ran the same test with your first patch for two hours and your
> second patch for 7 hours, without seeing any livelocks.
> 
> I added snapshots to the test and still did not get any livelocks, but
> I'm not certain that this last test covers your change.

Hmm, there is a PR reporting hangs when removing many files with
snapshots enabled, on 6.0.  I tried to reproduce it on 6.1 but failed
with the test case that the PR said was a reliable cause for them, so
I assumed it was fixed.  It may be that I didn't try hard enough
though, since I didn't see your problem either.

Kris

Received on Mon Apr 03 2006 - 18:34:10 UTC

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