From: Christoph Hellwig <hch@infradead.org>
To: Doug Ledford <dledford@redhat.com>
Cc: linux-scsi mailing list <linux-scsi@vger.kernel.org>
Subject: Re: smp dead lock of io_request_lock/queue_lock patch
Date: Sat, 17 Jan 2004 20:54:50 +0000 [thread overview]
Message-ID: <20040117205450.A7305@infradead.org> (raw)
In-Reply-To: <1074371793.13198.58.camel@compaq.xsintricity.com>; from dledford@redhat.com on Sat, Jan 17, 2004 at 03:36:33PM -0500
On Sat, Jan 17, 2004 at 03:36:33PM -0500, Doug Ledford wrote:
> I'm exactly the opposite. In my opinion, the mid layer should be using
> the device locks for its internal operations
well, I strongly disagree with that.
> and calling into the low
> level drivers with no locks held. The fact that the mid layer still
> tries to lock drivers for the drivers is a bug IMO. Every time I see a
> driver do spin_unlock_irq(host->host_lock); do driver work;
> spin_lock_irq(host->host_lock); return; it really points out that the
> mid layer has no business locking down drivers for them.
I completely agree with that, though. I didn't have time fixing up
all drivers before we got 2.6, though so this won't happen before 2.7.
Btw, I just noticed how little this has to do with the original discussion,
Cc list thus cut down quite a lot.
next prev parent reply other threads:[~2004-01-17 20:54 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-12 15:07 smp dead lock of io_request_lock/queue_lock patch Martin Peschke3
2004-01-12 15:12 ` Arjan van de Ven
2004-01-12 19:48 ` Christoph Hellwig
2004-01-12 19:51 ` Doug Ledford
2004-01-12 20:03 ` Christoph Hellwig
2004-01-12 21:12 ` Jens Axboe
2004-01-13 20:55 ` Marcelo Tosatti
2004-01-17 13:10 ` Doug Ledford
2004-01-17 16:58 ` Christoph Hellwig
2004-01-17 19:07 ` Doug Ledford
2004-01-17 19:17 ` Christoph Hellwig
2004-01-17 19:21 ` Doug Ledford
2004-01-17 19:29 ` Christoph Hellwig
2004-01-17 20:36 ` Doug Ledford
2004-01-17 20:54 ` Christoph Hellwig [this message]
2004-01-20 7:53 ` Jens Axboe
2004-01-25 0:31 ` Kurt Garloff
2004-01-15 17:17 ` Bill Davidsen
2004-01-17 13:12 ` Doug Ledford
2004-01-17 15:16 ` Bill Davidsen
2004-01-17 16:07 ` Doug Ledford
-- strict thread matches above, loose matches on Subject: below --
2004-01-19 21:36 Martin Peschke3
2004-03-08 21:25 ` Doug Ledford
2004-01-12 16:32 Peter Yao
2004-01-12 9:08 ` Arjan van de Ven
2004-01-12 9:19 ` Jens Axboe
2004-01-12 9:19 ` Jens Axboe
2004-01-12 9:20 ` Arjan van de Ven
2004-01-12 9:22 ` Jens Axboe
2004-01-12 13:27 ` Doug Ledford
2004-01-15 17:01 ` Bill Davidsen
2004-01-15 17:05 ` Jens Axboe
2004-01-15 17:09 ` Arjan van de Ven
2004-01-15 19:30 ` Doug Ledford
2004-01-12 14:07 Martin Peschke3
2004-01-12 14:11 ` Arjan van de Ven
2004-01-12 14:13 ` Jens Axboe
2004-01-12 15:08 ` Doug Ledford
2004-01-12 15:24 ` James Bottomley
2004-01-12 15:43 ` Jens Axboe
2004-01-12 15:52 ` Doug Ledford
2004-01-12 16:04 ` James Bottomley
2004-01-12 16:05 ` Doug Ledford
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