On Wed, 22 Aug 2001, Roger Larsson wrote:

On Wednesdayen den 22 August 2001 19:01, Rik van Riel wrote:

quoted

On Wed, 22 Aug 2001, Roger Larsson wrote:

quoted

Note: reclaim_page will fix this situation direct it is allowed to
run since it is kicked in __alloc_pages. But since we cannot
guarantee that this will never happen...

In this case kreclaimd will be woken up and the free pages
will be refilled.

Yes it will be woken up - but when will it actually do something?

And this limit at the end of alloc_pages
		if (z->free_pages < z->pages_min / 4 &&
				!(current->flags & PF_MEMALLOC))
is not enforced earlier in the same code...

Please read the code.  The first loop in __alloc_pages(),
before we even call __alloc_pages_limit() will wake up
kreclaimd as soon as 'z->free_pages < z->pages_min'.

If you have any more questions about the source code,
don't hesitate to ask ;)

Rik
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