From: catalin.marinas@arm.com (Catalin Marinas)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH V3 2/2] ARM: Handle user space mapped pages in flush_kernel_dcache_page
Date: Mon, 8 Oct 2012 18:44:28 +0100 [thread overview]
Message-ID: <20121008174428.GB3204@arm.com> (raw)
In-Reply-To: <1349609352-6408-3-git-send-email-gmbnomis@gmail.com>
On Sun, Oct 07, 2012 at 12:29:12PM +0100, Simon Baatz wrote:
> Commit f8b63c1 made flush_kernel_dcache_page() a no-op assuming that
> the pages it needs to handle are kernel mapped only. However, for
> example when doing direct I/O, pages with user space mappings may
> occur.
>
> Thus, do lazy flushing like in flush_dcache_page() if there are no user
> space mappings. Otherwise, flush the kernel cache lines directly.
Do you need to fix the VIPT non-aliasing case as well? Does
flush_kernel_dcache_page() need to handle I-cache?
--
Catalin
next prev parent reply other threads:[~2012-10-08 17:44 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-07 11:29 [PATCH V2 0/2] fix and improvement of flush(_kernel)_dcache_page() Simon Baatz
2012-10-07 11:29 ` [PATCH V2 1/2] ARM: remove unnecessary flush of anon pages in flush_dcache_page() Simon Baatz
2012-10-08 11:36 ` Catalin Marinas
2012-10-08 17:38 ` Simon Baatz
2012-10-08 17:43 ` Catalin Marinas
2012-10-07 11:29 ` [PATCH V3 2/2] ARM: Handle user space mapped pages in flush_kernel_dcache_page Simon Baatz
2012-10-08 17:44 ` Catalin Marinas [this message]
2012-10-08 20:02 ` Simon Baatz
2012-10-08 20:20 ` Russell King - ARM Linux
2012-10-08 23:07 ` Simon Baatz
2012-11-18 21:10 ` Jason Cooper
2013-04-18 11:16 ` Jason Cooper
2013-04-18 11:22 ` Russell King - ARM Linux
2013-04-18 11:40 ` Jason Cooper
2013-04-18 13:51 ` Catalin Marinas
2013-04-21 22:06 ` Simon Baatz
2013-04-30 11:22 ` Catalin Marinas
2013-04-30 21:04 ` Simon Baatz
2013-05-01 14:22 ` Catalin Marinas
2013-05-01 19:04 ` Simon Baatz
2013-05-02 9:54 ` Catalin Marinas
2013-05-02 19:38 ` Simon Baatz
2013-05-03 10:02 ` Catalin Marinas
2013-05-04 8:21 ` Ming Lei
2013-05-08 15:08 ` Catalin Marinas
2013-05-08 18:43 ` Russell King - ARM Linux
2013-05-08 19:31 ` Simon Baatz
2013-05-08 21:13 ` Catalin Marinas
2013-05-09 1:52 ` Ming Lei
2013-05-11 6:27 ` Simon Baatz
2013-05-13 3:12 ` Ming Lei
2013-05-05 22:26 ` Simon Baatz
2013-05-08 15:28 ` Catalin Marinas
2013-04-18 19:39 ` Simon Baatz
2013-04-18 19:00 ` Simon Baatz
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