Hi! On Fri 2008-05-16 13:05:45, 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. Do you remember seeing "my disk was wrecked" for reiserfs? I believe I got some corruption, but it was a) long time ago b) took half a year of hard powerdowns to provoke c) I did not report it anywhere because ... it just was not reproducible. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- 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
