http://bugzilla.kernel.org/show_bug.cgi?id=12320 ------- Comment #10 from nm127@xxxxxxxxxxx 2008-12-30 03:56 ------- Created an attachment (id=19538) --> (http://bugzilla.kernel.org/attachment.cgi?id=19538&action=view) revert 9bd27cba1aeacb6b12d05f4e5ed6361072f08fe0 (In reply to comment #6) > Created an attachment (id=19528) --> (http://bugzilla.kernel.org/attachment.cgi?id=19528&action=view) [details] > 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 <petkovbb@xxxxxxxxx> > 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 <petkovbb@xxxxxxxxx> > Cc: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx> > Tested-by: Valerio Passini <valerio.passini@xxxxxxxxx> > [bart: fixup patch description per comments from Sergei Shtylyov] > Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx> > > :040000 040000 998c57acb8e63f2f1d64543f2c03ecfc05beb3a0 > fef197de8e3c9db1308917eaeb1c10f196a8a8ab M drivers Reverting this patch on top of 2.6.28 removes the warn_on_slowpath messages from dmesg. -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
