Messages in this thread | | | Date | Thu, 09 Feb 2006 19:35:05 +1100 | From | Nick Piggin <> | Subject | Re: msync() behaviour broken for MS_ASYNC, revert patch? |
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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?
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