https://bugzilla.kernel.org/show_bug.cgi?id=14830 Justin Maggard <jmaggard10@xxxxxxxxx> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jmaggard10@xxxxxxxxx --- Comment #39 from Justin Maggard <jmaggard10@xxxxxxxxx> 2010-05-20 02:11:11 --- (In reply to comment #28) > Created an attachment (id=25883) --> (https://bugzilla.kernel.org/attachment.cgi?id=25883) [details] > Patch to stop background writeback when other work is queued for the thread > > Oops, attached a wrong patch. This is the right one. I ran into this issue recently (extra long sync times) and have been trying the patches attached in this thread. The above patch specifically causes a pretty significant performance regression for me doing a simple sequential dd write on a dual-core Atom system running 2.6.33.4 x86_64. This command: dd bs=1M conv=fsync if=/dev/zero of=test_file count=10000 went from 135 MB/sec to all the way down to 92.9 MB/sec. Is this expected? -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
