Re: [rfc][patch] remove racy sync_page?
From: Mark Lord
Date: Tue May 30 2006 - 21:37:29 EST
Linus wrote:
(Yes, tagged queueing makes it less of an issue, of course. I know,
My observations with (S)ATA tagged/native queuing, is that it doesn't make
nearly the difference under Linux that it does under other OSs.
Probably because our block layer is so good at ordering requests,
either from plugging or simply from clever disk scheduling.
I know. But I _think_ a lot of disks will start seeking for an incoming
command the moment they see it, just to get the best latency, rather than
wait a millisecond or two to see if they get another request. So even
with tagged queuing, the elevator can help, _especially_ for the initial
request).
Yup. Agreed!
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