Hello,

On Sat, Jan 08, 2011 at 08:45:24AM +0100, Christoph Hellwig wrote:

On Fri, Jan 07, 2011 at 06:54:49PM -0500, Ted Ts'o wrote:

quoted

This patch seemed like a good idea to me; I just checked linux-next,
and looks like nothing like this is planned to be merged.  Just
thought I would send a prod-o-gram to see what the current thinking
was around adding something like this.

I haven't really gotten any feedback on the patch, so it fell on the
floor for a while.  I've managed to get some big system resources to
test the impact of it, and once I've got numbers I'll resend it as
separate patches for scsi and the block layer.

But would it actually make any difference?  It's not like the usual
completion path in the optimized case is much longer.  It will set all
the skip bits, try to determine the next step which is completion and
then complete the flush request.  It'll sure occupy the CPU for a
little bit longer but I don't think it will be anything measureable.
Is there a workload that this can actually help?

Thanks.

-- 
tejun