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Message-ID: <x49hbnpkaqw.fsf@segfault.boston.devel.redhat.com> Date: Mon, 05 Apr 2010 14:36:07 -0400 From: Jeff Moyer <jmoyer@...hat.com> To: tytso@....edu Cc: linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org, jens.axboe@...cle.com, esandeen@...hat.com Subject: Re: [patch/rft] jbd2: tag journal writes as metadata I/O tytso@....edu writes: > On Thu, Apr 01, 2010 at 03:04:54PM -0400, Jeff Moyer wrote: >> >> So, I'm submitting this patch for comments and testing. I have a >> similar patch for jbd that I will submit if folks agree that this is a >> good idea. > > Added to the ext4 patch queue. > > What benchmark were you using to test small file writes? This looks > good to me as well, but we might want to do some extra benchmarking > just to be sure we're not accidentally introducing a performance > regression. iozone showed regressions for write and re-write in runs that include fsync timings for small files (<8MB). Here's the command line used for testing: iozone -az -n 4k -g 2048m -y 1k -q 1m -e I also ran fs_mark using the following command line: fs_mark -S 1 -D 100 -N 1000 -d /mnt/test/fs_mark -s 65536 -t 1 -w 4096 I'll let you know if there are any regressions caused by this patch in any of our other testing. Cheers, Jeff -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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