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| author | Vlastimil Babka <vbabka@suse.cz> | 2015-02-12 00:25:44 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-12 02:06:02 +0100 |
| commit | 1a6d53a105406d97396c87511afd6f09b4dc8ad2 (patch) | |
| tree | cca48e0dfdb6ef300f34921287cabdbb5da2e4d9 /mm/page_alloc.c | |
| parent | mm, page_alloc: reduce number of alloc_pages* functions' parameters (diff) | |
| download | linux-1a6d53a105406d97396c87511afd6f09b4dc8ad2.tar.xz linux-1a6d53a105406d97396c87511afd6f09b4dc8ad2.zip | |
mm: reduce try_to_compact_pages parameters
Expand the usage of the struct alloc_context introduced in the previous
patch also for calling try_to_compact_pages(), to reduce the number of its
parameters. Since the function is in different compilation unit, we need
to move alloc_context definition in the shared mm/internal.h header.
With this change we get simpler code and small savings of code size and stack
usage:
add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-27 (-27)
function old new delta
__alloc_pages_direct_compact 283 256 -27
add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-13 (-13)
function old new delta
try_to_compact_pages 582 569 -13
Stack usage of __alloc_pages_direct_compact goes from 24 to none (per
scripts/checkstack.pl).
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 27 |
1 files changed, 2 insertions, 25 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 4aead0bd8d44..d664eb922a7d 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -232,27 +232,6 @@ EXPORT_SYMBOL(nr_node_ids); EXPORT_SYMBOL(nr_online_nodes); #endif -/* - * Structure for holding the mostly immutable allocation parameters passed - * between alloc_pages* family of functions. - * - * nodemask, migratetype and high_zoneidx are initialized only once in - * __alloc_pages_nodemask() and then never change. - * - * zonelist, preferred_zone and classzone_idx are set first in - * __alloc_pages_nodemask() for the fast path, and might be later changed - * in __alloc_pages_slowpath(). All other functions pass the whole strucure - * by a const pointer. - */ -struct alloc_context { - struct zonelist *zonelist; - nodemask_t *nodemask; - struct zone *preferred_zone; - int classzone_idx; - int migratetype; - enum zone_type high_zoneidx; -}; - int page_group_by_mobility_disabled __read_mostly; void set_pageblock_migratetype(struct page *page, int migratetype) @@ -2429,10 +2408,8 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order, return NULL; current->flags |= PF_MEMALLOC; - compact_result = try_to_compact_pages(ac->zonelist, order, gfp_mask, - ac->nodemask, mode, - contended_compaction, - alloc_flags, ac->classzone_idx); + compact_result = try_to_compact_pages(gfp_mask, order, alloc_flags, ac, + mode, contended_compaction); current->flags &= ~PF_MEMALLOC; switch (compact_result) { |