linux-kernel - Re: [SUGGESTION]: drop virtual merge accounting in I/O requests

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Date:	Sun, 13 Jul 2008 20:20:35 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	fujita.tomonori@....ntt.co.jp
Cc:	andi@...stfloor.org, mpatocka@...hat.com,
	sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org,
	jens.axboe@...cle.com
Subject: Re: [SUGGESTION]: drop virtual merge accounting in I/O requests

From: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Date: Mon, 14 Jul 2008 11:19:02 +0900

> Now IOMMUs don't ignore the max_segment_size. We hit this problem.

It seems simply that max_segment_size needs to propagate
down into the block layer VMERGE code so that it can
act accordingly.
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