From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugme-daemon@bugzilla.kernel.org
Subject: [Bug 12320] warn_on_slowpath when playing audio CD
Date: Mon, 29 Dec 2008 07:49:45 -0800 (PST)
Message-ID: <20081229154945.909D210800C@picon.linux-foundation.org>
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http://bugzilla.kernel.org/show_bug.cgi?id=12320
------- Comment #6 from nm127@freemail.hu 2008-12-29 07:49 -------
Created an attachment (id=19528)
--> (http://bugzilla.kernel.org/attachment.cgi?id=19528&action=view)
git bisect log
(In reply to comment #3)
> I started to git bisecting the problem but this might take a while.
The result of git bisecting is:
9bd27cba1aeacb6b12d05f4e5ed6361072f08fe0 is first bad commit
commit 9bd27cba1aeacb6b12d05f4e5ed6361072f08fe0
Author: Borislav Petkov
Date: Sun Nov 2 21:40:07 2008 +0100
ide-cd: fix DMA alignment regression
e5318b531b008c79d2a0c0df06a7b8628da38e2f ("ide: use the dma safe check for
REQ_TYPE_ATA_PC") introduced a regression which caused some ATAPI drives to
turn off DMA for REQ_TYPE_BLOCK_PC commands while burning and thus
degrading
performance and ultimately causing an excessive amount of underruns.
The issue is documented also in:
http://bugzilla.kernel.org/show_bug.cgi?id=11742.
Signed-off-by: Borislav Petkov
Cc: FUJITA Tomonori
Tested-by: Valerio Passini
[bart: fixup patch description per comments from Sergei Shtylyov]
Signed-off-by: Bartlomiej Zolnierkiewicz
:040000 040000 998c57acb8e63f2f1d64543f2c03ecfc05beb3a0
fef197de8e3c9db1308917eaeb1c10f196a8a8ab M drivers
(In reply to comment #4)
> can you try the following patch on a failing kernel and send me the whole dmesg output?
I'll have a look.
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