From: Jens Axboe <jens.axboe@oracle.com>
To: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Mike Anderson <andmike@linux.vnet.ibm.com>,
linux-scsi <linux-scsi@vger.kernel.org>
Subject: Re: Block timeouts seem not to be working
Date: Thu, 11 Sep 2008 20:35:09 +0200 [thread overview]
Message-ID: <20080911183509.GX20055@kernel.dk> (raw)
In-Reply-To: <1221145521.3330.2.camel@localhost.localdomain>
On Thu, Sep 11 2008, James Bottomley wrote:
> I just noticed this with a rather finickey SAS system I have. It's got
> a SATA DVD attached over an expander. Periodically the DVD just hangs
> up, so we wait for the timeout and then send a phy reset which clears
> it.
>
> What I'm seeing with the new block timer code is that the timer never
> expires. I can dig some more into this, but if you wanted to test it as
> well, the timer code is easy to excite. Just throw away one command in
> every 128 or so in the queuecommand routine of your favourite HBA
> driver.
James, I've seen a few oddities as well, I'll be beating on it tomorrow
again to shake out the last bug(s).
--
Jens Axboe
next prev parent reply other threads:[~2008-09-11 18:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-11 15:05 Block timeouts seem not to be working James Bottomley
2008-09-11 15:42 ` Mike Anderson
2008-09-11 18:35 ` Jens Axboe [this message]
2008-09-12 21:46 ` James Bottomley
2008-09-15 20:01 ` Mike Christie
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