Messages in this thread Patch in this message |  | | | Date | Wed, 26 May 2004 20:39:51 +1000 | | From | Nigel Cunningham <> | | Subject | [PATCH] SMP support for drain local pages. |
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From: Nigel Cunningham <ncunningham@linuxmail.org>
Hi.
This patch adds SMP support for drain_local_pages, so that suspend implementations can drain pcp structures on all CPUs and thus accurately determine which pages are free.
Please apply.
diff -ruN 2.6.6-current-bk/mm/page_alloc.c smp-drain-local-pages/mm/page_alloc.c --- 2.6.6-current-bk/mm/page_alloc.c 2004-05-26 19:47:15.000000000 +1000 +++ smp-drain-local-pages/mm/page_alloc.c 2004-05-26 19:56:19.000000000 +1000 @@ -459,6 +459,24 @@ __drain_pages(smp_processor_id()); local_irq_restore(flags); } + +#ifdef CONFIG_SMP +static void __smp_drain_local_pages(void * data) +{ + drain_local_pages(); +} + +void smp_drain_local_pages(void) +{ + smp_call_function(__smp_drain_local_pages, NULL, 0, 1); + drain_local_pages(); +} +#else +void smp_drain_local_pages(void) +{ + drain_local_pages(); +} +#endif #endif /* CONFIG_PM */
static void zone_statistics(struct zonelist *zonelist, struct zone *z)
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