Re: 0-order allocation problem

On Wed, 15 Aug 2001, Marcelo Tosatti wrote:

 __GFP_IO is not going to help us that much on anon intensive workloads
(eg swapoff). Remember we are _never_ going to block on buffer_head's of
on flight swap pages because we can't see them in page_launder(). (if a
page is locked, we simply skip it)

Note that that is what we have the page_alloc (and buffer head) reserves
for - and it doesn't take that much to get the ball rolling. Certainly not
even close to our low-water-marks.. And once it snowballs it _does_ help
that people call page_launder().

		Linus

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