On Sunday 18 May 2008, Andi Kleen wrote: > Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> writes: > > On Fri, 16 May 2008 14:02:46 -0500 > > > > Eric Sandeen <sandeen@xxxxxxxxxx> wrote: > >> A collection of patches to make ext3 & 4 use barriers by > >> default, and to call blkdev_issue_flush on fsync if they > >> are enabled. > > > > Last time this came up lots of workloads slowed down by 30% so I > > dropped the patches in horror. > > Didn't ext4 have some new checksum trick to avoid them? I didn't think checksumming avoided barriers completely. Just the barrier before the commit block, not the barrier after. -chris -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
