Re: [PULL 00/16] migration queue

[Christian Schoenebeck]

On Samstag, 31. Oktober 2020 18:46:11 CET Peter Xu wrote:
> On Sat, Oct 31, 2020 at 05:26:28PM +0000, Peter Maydell wrote:
> > On Sat, 31 Oct 2020 at 16:12, Christian Schoenebeck
> > 
> > <qemu_oss@crudebyte.com> wrote:
> > > On Montag, 26. Oktober 2020 17:19:36 CET Dr. David Alan Gilbert (git) 
wrote:
> > > > ----------------------------------------------------------------
> > > > migration pull: 2020-10-26
> > > > 
> > > > Another go at Peter's postcopy fixes
> > > > 
> > > > Cleanups from Bihong Yu and Peter Maydell.
> > > > 
> > > > Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> > > 
> > > May it be possible that this PR introduced a lockup of the qtests that I
> > > am
> > > encountering in this week's upstream revisions?
> > 
> > If you try the patches Peter Xu attached to this thread
> > does the lockup go away ?
> > 
> > https://lore.kernel.org/qemu-devel/20201030135350.GA588069@xz-x1/
> > 
> > (I'm also seeing intermittent hangs, for some reason almost always
> > on s390x host.)
> 
> It would be good to know exactly which test hanged.  If it's migration-test
> then it's very possible.

It's run-test-144 that does not return; according to Makefile.mtest that's 
migration-test, so chances are high that it's indeed introduced by this PR.

> The race above patch(es) tried to fix should logically be reproducable on
> all archs, not s390x only.
> 
> Thanks,

Yes, it's i386 here that locks up.

I'm running the loop with your patches now, so far so good, let's see if it's 
still alive tomorrow.

Best regards,
Christian Schoenebeck