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| author | Christoph Lameter <clameter@sgi.com> | 2006-09-25 23:31:40 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-26 08:48:50 -0700 |
| commit | 9b819d204cf602eab1a53a9ec4b8d2ca51e02a1d (patch) | |
| tree | 9442bf01a00a93a8ae54462fb4878588e1b2a6bf /mm | |
| parent | 056c62418cc639bf2fe962c6a6ee56054b838bc7 (diff) | |
| download | blackbird-op-linux-9b819d204cf602eab1a53a9ec4b8d2ca51e02a1d.tar.gz blackbird-op-linux-9b819d204cf602eab1a53a9ec4b8d2ca51e02a1d.zip | |
[PATCH] Add __GFP_THISNODE to avoid fallback to other nodes and ignore cpuset/memory policy restrictions
Add a new gfp flag __GFP_THISNODE to avoid fallback to other nodes. This
flag is essential if a kernel component requires memory to be located on a
certain node. It will be needed for alloc_pages_node() to force allocation
on the indicated node and for alloc_pages() to force allocation on the
current node.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/mempolicy.c | 2 | ||||
| -rw-r--r-- | mm/page_alloc.c | 3 |
2 files changed, 4 insertions, 1 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index c3429a710ab1..8002e1faccda 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -1290,7 +1290,7 @@ struct page *alloc_pages_current(gfp_t gfp, unsigned order) if ((gfp & __GFP_WAIT) && !in_interrupt()) cpuset_update_task_memory_state(); - if (!pol || in_interrupt()) + if (!pol || in_interrupt() || (gfp & __GFP_THISNODE)) pol = &default_policy; if (pol->policy == MPOL_INTERLEAVE) return alloc_page_interleave(gfp, order, interleave_nodes(pol)); diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 208a6b03aa78..ea498788af53 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -893,6 +893,9 @@ get_page_from_freelist(gfp_t gfp_mask, unsigned int order, * See also cpuset_zone_allowed() comment in kernel/cpuset.c. */ do { + if (unlikely((gfp_mask & __GFP_THISNODE) && + (*z)->zone_pgdat != zonelist->zones[0]->zone_pgdat)) + break; if ((alloc_flags & ALLOC_CPUSET) && !cpuset_zone_allowed(*z, gfp_mask)) continue; |
