Andrew Morton wrote:
2.4:
MS_ASYNC: dirty the pagecache pages, start I/O
MS_SYNC: dirty the pagecache pages, start I/O, wait on I/O
2.6:
MS_ASYNC: dirty the pagecache pages
MS_SYNC: dirty the pagecache pages, start I/O, wait on I/O.
So you're saying that doing the I/O in that 25-100msec window allowed your
app to do more pipelining.
I think for most scenarios, what we have in 2.6 is better: it gives the app
more control over when the I/O should be started.
How so?
--
SUSE Labs, Novell Inc.
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