Messages in this thread | | | Date | Thu, 29 May 2008 08:36:17 -0500 | From | Eric Sandeen <> | Subject | Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes |
| |
Andrew Morton wrote: > On Fri, 16 May 2008 14:02:46 -0500 > Eric Sandeen <sandeen@redhat.com> 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
| |