From: "Matt Reimer" <mattjreimer@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm: D-cache aliasing issue in cow_user_page
Date: Mon, 4 Dec 2006 23:38:13 -0800 [thread overview]
Message-ID: <f383264b0612042338y2609dd76w8ba562394800bbd0@mail.gmail.com> (raw)
In light of James Bottomsley's commit[1] declaring that kmap() and
friends now have to take care of coherency issues, is the patch "mm:
D-cache aliasing issue in cow_user_page"[2] correct, or could it
potentially cause a slowdown by calling flush_dcache_page() a second
time (i.e. once in an architecture-specific kmap() implementation, and
once in cow_user_page())?
Matt
[1] http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=a6ca1b99ed434f3fb41bbed647ed36c0420501e5
[2] http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=c4ec7b0de4bc18ccb4380de638550984d9a65c25
next reply other threads:[~2006-12-05 7:38 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-05 7:38 Matt Reimer [this message]
2006-12-05 21:24 ` David Miller
2006-12-06 0:57 ` Matt Reimer
2006-12-06 0:59 ` David Miller
2006-12-06 7:04 ` Matt Reimer
2006-12-06 21:19 ` Matt Reimer
2006-12-07 0:46 ` David Miller
2006-12-07 6:20 ` Matt Reimer
2006-12-07 7:22 ` David Miller
-- strict thread matches above, loose matches on Subject: below --
2006-10-17 9:15 [PATCH] mm:D-cache " Dmitriy Monakhov
2006-10-19 6:33 ` Andrew Morton
2006-10-19 7:00 ` David Miller
2006-10-19 7:17 ` Andrew Morton
2006-10-19 7:22 ` David Miller
2006-10-19 7:41 ` Andrew Morton
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