Messages in this thread | | | Date | Thu, 21 Aug 2008 07:26:05 +0200 | From | Jens Axboe <> | Subject | Re: Mount ext3 with barrier=1 doesn't send real barrier bio? |
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On Wed, Aug 20 2008, Eric Sandeen wrote: > Milan Broz wrote: > > Hi, > > > > I run some barrier tests over device-mapper (which currently doesn't > > support barrier bio at all) and even if I set barrier=1 in ext3 mount, > > there is never any bio with barrier flag... (in 2.6.27-rc) > > > > How is the barrier=1 flag supposed to work in ext3 (JBD) now? > > Milan, you're right. Ric saw this same strange behavior when doing some > benchmarking with and without barriers; Chris noticed the change in > submit_bh; I was about to write up a similar patch to what you've sent > already. Jens, does Milan's fix look good to you?
Yep looks good, thanks a lot Milan! I'll send in the patch, unless I'm badly mistaken we need it for 2.6.26-stable as well.
-- Jens Axboe
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