From: gking@nvidia.com (Gary King)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] bounce: call flush_dcache_page after bounce_copy_vec
Date: Tue, 7 Sep 2010 13:45:34 -0700 [thread overview]
Message-ID: <1283892334-9238-1-git-send-email-gking@nvidia.com> (raw)
I have been seeing problems on Tegra 2 (ARMv7 SMP) systems with HIGHMEM
enabled on 2.6.35 (plus some patches targetted at 2.6.36 to perform
cache maintenance lazily), and the root cause appears to be that the
mm bouncing code is calling flush_dcache_page before it copies the
bounce buffer into the bio.
The patch below reorders these two operations, and eliminates numerous
arbitrary application crashes on my dev system.
Gary
--
next reply other threads:[~2010-09-07 20:45 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-07 20:45 Gary King [this message]
2010-09-08 19:47 ` [PATCH] bounce: call flush_dcache_page after bounce_copy_vec Andrew Morton
2010-09-08 19:49 ` Jens Axboe
2010-09-09 0:49 ` Bryan Wu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1283892334-9238-1-git-send-email-gking@nvidia.com \
--to=gking@nvidia.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).