[Sheepdog] [PATCH] sheep: unify create_and_write logic for cow and regular object

Christoph Hellwig hch at infradead.org
Tue Nov 15 09:21:47 CET 2011

On Tue, Nov 15, 2011 at 04:18:52PM +0800, Liu Yuan wrote:
> Umm, seems useless, I just squeeze it to the code path. any noticeable
> performance penalty?

With the current O_SYNC I/O model it at least means an additional log
force, which on disks will be very noticeable.  So unless you really
see a difference in I/O patterns don't do it.

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