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From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Jens Axboe <jens.axboe@oracle.com>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>,
	linux-kernel@vger.kernel.org, mingo@elte.hu
Subject: Re: [PATCH 2/2] x86: replace BIO_VMERGE_BOUNDARY with BIOVEC_PHYS_MERGEABLE
Date: Mon, 27 Oct 2008 22:43:29 +1100	[thread overview]
Message-ID: <4905A961.9000603@goop.org> (raw)
In-Reply-To: <20081027094111.GU22217@kernel.dk>

Jens Axboe wrote:
> Pretty much baffles me as well, xen should just need to do
>
> #define BIOVEC_PHYS_MERGEABLE(vec1, vec2)       0
>   

It needs to be a runtime switch, since we only want to do this when 
actually running under Xen.  Also, its possible that the two pages might 
actually be physically contiguous, so they could be merged anyway.

    J

  reply	other threads:[~2008-10-27 11:44 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-24  5:41 [PATCH] x86: remove dead BIO_VMERGE_BOUNDARY definition FUJITA Tomonori
2008-10-24 20:58 ` Jeremy Fitzhardinge
2008-10-27  4:42   ` FUJITA Tomonori
2008-10-24 20:59 ` [PATCH 1/2] bio: define __BIOVEC_PHYS_MERGEABLE Jeremy Fitzhardinge
2008-10-24 20:59 ` [PATCH 2/2] x86: replace BIO_VMERGE_BOUNDARY with BIOVEC_PHYS_MERGEABLE Jeremy Fitzhardinge
2008-10-27  3:52   ` FUJITA Tomonori
2008-10-27  8:21     ` Jeremy Fitzhardinge
2008-10-27  8:37       ` FUJITA Tomonori
2008-10-27  9:18         ` Jeremy Fitzhardinge
2008-10-27  9:36           ` FUJITA Tomonori
2008-10-27  9:41             ` Jens Axboe
2008-10-27 11:43               ` Jeremy Fitzhardinge [this message]
2008-10-27 11:57                 ` Jens Axboe
2008-10-28 23:06                   ` FUJITA Tomonori
2008-10-29  8:37                     ` Ingo Molnar
2008-10-29  9:24                       ` Jeremy Fitzhardinge
2008-10-29 10:51                         ` Ingo Molnar
2008-10-29 11:25                           ` Ingo Molnar
2008-10-29 11:27                             ` Jens Axboe
2008-10-29 11:30                               ` Ingo Molnar
2008-10-29 11:34                                 ` Jens Axboe
2008-10-29 11:55                                   ` FUJITA Tomonori
2008-10-29 12:12                                 ` Jeremy Fitzhardinge
2008-10-29 13:03                                   ` Ingo Molnar
2008-10-29 13:06                                     ` Jeremy Fitzhardinge
2008-10-29 13:06                                       ` Jens Axboe
2008-10-29  9:27                     ` Jens Axboe

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