Andrew Morton wrote: > 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. > > I just don't think we can quietly go and slow everyone's machines down > by this much. The overhead of journalling is already pretty horrid. > > If we were seeing a significant number of "hey, my disk got wrecked" > reports which attributable to this then yes, perhaps we should change > the default. But I've never seen _any_, although I've seen claims that > others have seen reports. Here's a recent one, just FYI. http://marc.info/?l=ext3-users&m=121205834608161&w=2 -Eric -- 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
