From: Zach Brown <zach.brown@oracle.com>
To: Jeff Moyer <jmoyer@redhat.com>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] dio: lock refcount operations
Date: Fri, 27 Oct 2006 16:34:22 -0700 [thread overview]
Message-ID: <4542977E.5030007@oracle.com> (raw)
In-Reply-To: <x49odrxnyyt.fsf@segfault.boston.devel.redhat.com>
> zach.brown> The addition of the interrupt masking spin lock acquiry in
> zach.brown> dio_bio_submit() looks alarming. This lock acquiry existed in
> zach.brown> that path before the recent dio completion patch set. We
> zach.brown> shouldn't expect significant performance regression from
> zach.brown> returning to the behaviour that existed before the completion
> zach.brown> clean up work.
>
> Are you going to quantify this at all? I think we should.
I could try to take a swing at it next week, sure.
Leaving it for Ken is pretty tempting, though :)
- z
next prev parent reply other threads:[~2006-10-27 23:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-27 18:17 [PATCH] dio: lock refcount operations Zach Brown
2006-10-27 19:27 ` Jeff Moyer
2006-10-27 20:34 ` Zach Brown
2006-10-27 23:03 ` Jeff Moyer
2006-10-27 23:34 ` Zach Brown [this message]
2006-11-02 1:51 ` Zach Brown
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