From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Mark Lord <liml@rtr.ca>, Jeff Garzik <jgarzik@pobox.com>,
Tejun Heo <htejun@gmail.com>, Alan Cox <alan@redhat.com>,
IDE/ATA development list <linux-ide@vger.kernel.org>,
FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Subject: Re: libata .sg_tablesize: why always dividing by 2 ?
Date: Wed, 27 Feb 2008 10:16:17 +1100 [thread overview]
Message-ID: <1204067777.15052.182.camel@pasglop> (raw)
In-Reply-To: <1204065001.15052.177.camel@pasglop>
> And the fact that this will totally blow fragmentation through the roof
> and cause half of the dma-map requests to fail on machines with small
> iommu has been totally ignored I suppose ?
Ok, so after checking those patches more closely, it appears that
alignment will only be enforced for devices that impose segment
boundaries, which means that normal devices can still pack. That
sounds good.
Ben.
next prev parent reply other threads:[~2008-02-26 23:28 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-26 0:02 libata .sg_tablesize: why always dividing by 2 ? Mark Lord
2008-02-26 0:15 ` Jeff Garzik
2008-02-26 0:27 ` Mark Lord
2008-02-26 0:54 ` Benjamin Herrenschmidt
2008-02-26 1:37 ` Mark Lord
2008-02-26 1:43 ` Mark Lord
2008-02-26 2:54 ` Benjamin Herrenschmidt
2008-02-26 4:38 ` Mark Lord
2008-02-26 5:30 ` Benjamin Herrenschmidt
2008-02-26 5:43 ` Mark Lord
2008-02-26 5:47 ` Benjamin Herrenschmidt
2008-02-26 16:09 ` James Bottomley
2008-02-26 21:43 ` Benjamin Herrenschmidt
2008-02-26 16:25 ` Mark Lord
2008-02-26 16:51 ` Mark Lord
2008-02-26 21:50 ` Benjamin Herrenschmidt
2008-02-26 21:56 ` James Bottomley
2008-02-26 22:30 ` Benjamin Herrenschmidt
2008-02-26 23:16 ` Benjamin Herrenschmidt [this message]
2008-02-26 21:43 ` Benjamin Herrenschmidt
2008-02-26 23:07 ` Alan Cox
2008-02-26 23:19 ` Benjamin Herrenschmidt
2008-02-28 7:36 ` FUJITA Tomonori
2008-02-28 7:44 ` Benjamin Herrenschmidt
2008-02-26 2:52 ` Benjamin Herrenschmidt
2008-02-26 0:22 ` Jeff Garzik
2008-02-26 0:28 ` Mark Lord
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