Messages in this thread | | | From | Neil Brown <> | Date | Thu, 31 May 2007 10:22:58 +1000 | Subject | Re: [RFD] BIO_RW_BARRIER - what it means for devices, filesystems, and dm/md. |
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On Tuesday May 29, psusi@cfl.rr.com wrote: > Neil Brown wrote: > > md/dm modules could keep count of requests as has been suggested > > (though that would be a fairly big change for raid0 as it currently > > doesn't know when a request completes - bi_endio goes directly to the > > filesystem). > > Are you sure? I believe that dm handles bi_endio because it waits for > all in progress bio to complete before switching tables.
I was taking about md/raid0, not dm-stripe. md/raid0 (and md/linear) currently never know that a request has completed.
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