Date: Tue, 24 Apr 2007 15:54:11 +0930 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: freebsd-current@freebsd.org Cc: William Josephson <freebsd-current@morphisms.net>, current@freebsd.org Subject: Re: ATA FLUSHCACHE Message-ID: <200704241554.12605.doconnor@gsoft.com.au> In-Reply-To: <20070424051420.GA84831@mero.morphisms.net> References: <20070424051420.GA84831@mero.morphisms.net>
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On Tuesday 24 April 2007 14:44, William Josephson wrote:
> I've recently installed -CURRENT on a new machine after the
> LCD in my old one died. I now have ZFS running as the root
> filesystem. The result is very pleasant if a little slow,
> although that may be my disk. I have noticed a fair number
> of messages of the form ``ATA - FLUSHCACHE timed out'' while
> running with ZFS. Is this expected behavior when running on
> the bare metal?
I see this when using gjournal too.
I suspect the timeout on the flush cache command needs to be increased.=20
I haven't got around to testing it but you could try increasing the=20
timeout in ata-disk.c (around line 280) ->
case BIO_FLUSH:
request->u.ata.lba =3D 0;
request->u.ata.count =3D 0;
request->u.ata.feature =3D 0;
request->bytecount =3D 0;
request->transfersize =3D 0;
request->timeout =3D 1;
request->retries =3D 0;
request->flags =3D ATA_R_CONTROL;
request->u.ata.command =3D ATA_FLUSHCACHE;
break;
=2D-=20
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
-- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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