Re: [rfc][patch] remove racy sync_page?

[Nikita Danilov]

Nick Piggin writes:
 > Nick Piggin wrote:
 > > Linus Torvalds wrote:
 > > 
 > >>
 > >> Why do you think the IO layer should get larger requests?
 > > 
 > > 
 > > For workloads where plugging helps (ie. lots of smaller, contiguous
 > > requests going into the IO layer), should be pretty good these days
 > > due to multiple readahead and writeback.
 > 
 > Let me try again.
 > 
 > For workloads where plugging helps (ie. lots of smaller, contiguous
 > requests going into the IO layer), the request pattern should be
 > pretty good without plugging these days, due to multiple page
 > readahead and writeback.

Pageout by VM scanner doesn't benefit from those, and it is still quite
important in some workloads (e.g., mmap intensive).

Nikita.
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