Commit 47f3a867 authored Jan 06, 2006 by Paul Jackson Committed by Linus Torvalds Jan 06, 2006

[PATCH] mm: fix __alloc_pages cpuset ALLOC_* flags



Two changes to the setting of the ALLOC_CPUSET flag in
mm/page_alloc.c:__alloc_pages()

- A bug fix - the "ignoring mins" case should not be honoring ALLOC_CPUSET.
  This case of all cases, since it is handling a request that will free up
  more memory than is asked for (exiting tasks, e.g.) should be allowed to
  escape cpuset constraints when memory is tight.

- A logic change to make it simpler.  Honor cpusets even on GFP_ATOMIC
  (!wait) requests.  With this, cpuset confinement applies to all requests
  except ALLOC_NO_WATERMARKS, so that in a subsequent cleanup patch, I can
  remove the ALLOC_CPUSET flag entirely.  Since I don't know any real reason
  this logic has to be either way, I am choosing the path of the simplest
  code.

Signed-off-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent a576219a

mm/page_alloc.c

+2 −3

Original line number	Diff line number	Diff line
		@@ -903,7 +903,6 @@ restart:
		alloc_flags \|= ALLOC_HARDER;
		if (gfp_mask & __GFP_HIGH)
		alloc_flags \|= ALLOC_HIGH;
		if (wait)
		alloc_flags \|= ALLOC_CPUSET;

		/*
		@@ -926,7 +925,7 @@ restart:
		nofail_alloc:
		/* go through the zonelist yet again, ignoring mins */
		page = get_page_from_freelist(gfp_mask, order,
		zonelist, ALLOC_NO_WATERMARKS\|ALLOC_CPUSET);
		zonelist, ALLOC_NO_WATERMARKS);
		if (page)
		goto got_pg;
		if (gfp_mask & __GFP_NOFAIL) {

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