Messages in this thread | | | Date | Thu, 4 Dec 2008 12:53:07 -0500 | From | Christoph Hellwig <> | Subject | Re: Device loses barrier support (was: Fixed patch for simple barriers.) |
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On Thu, Dec 04, 2008 at 06:48:38PM +0100, Andi Kleen wrote: > I think. Just the low level xfs_buf interface happens to use the asynchronous > callbacks instead of calling into the block layer directly like jbd et.al. > do.
Only delwri buffers are delayed in XFS, but the journaling code only uses async buffers which *synchronously* call into the block layer, but just don't wait for it to complete..
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