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From: Jaime Bozza <jbozza@mindsites.com>
To: Arnaud Houdelette <arnaud.houdelette@tzim.net>
Date: Mon, 26 Oct 2009 10:52:39 -0500
Thread-Topic: Possible scheduler (SCHED_ULE) bug?
Thread-Index: AcpWPbWTUbNuBDr4Tv+mMjbmX6aBCwAFl4Fg
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Cc: "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org>,
	Jacob Myers <jacob@whotookspaz.org>
Subject: RE: Possible scheduler (SCHED_ULE) bug?
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From: Arnaud Houdelette [mailto:arnaud.houdelette@tzim.net]
> I haven't tried larger files - Maybe the boundary is different on amd64? =
  Doing some quick tests
> right now, I was able to upload a 100MB file without a problem, but this =
is an AMD64 system with SMP,
> plus the filesystem is all ZFS, so there are too many things different.  =
I'll have to setup a system
> that closely mirrors the rest of my tests (UFS, ULE, no SMP, etc) before =
I can say I'm not having a
> problem there.
> >
> > Jaime
> >
> I had the same issue using 7.1 amd64, with ZFS, no SMP.
> Not really sure what is the size boundary. I can't really test either,
> as the machine is remote.
> But I confirm that each tentative upload of certain relatively 'big'
> files (around 1MB) with wordpress hanged the system before I switched
> from sendfile to writev.
>=20
> I might do some test on amd64 7.2 with no SMP if it can be of any use ?
>=20
> Arnaud

I was able to duplicate the problem on 7.2-STABLE amd64 no SMP - Problem di=
dn't seem to happen with SMP on.  While I wasn't able to get a crash dump, =
the crash looked similar.

Jaime