Messages in this thread |  | | | Date | Thu, 27 May 2004 21:25:37 +0200 | | From | Pavel Machek <> | | Subject | Re: [PATCH] SMP support for drain local pages. |
| |
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.
Why do you need it, btw?
1st it might be easier to just on_each_cpu(drain_local_pages) in suspend2
2nd all but one cpus are stopped, right? That mrans that their local pages can't mess up suspnd's accounting => no need to drain them. Pavel
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) > > > > - > To unsubscribe from this list: send the line "unsubscribe > linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
-- 64 bytes from 195.113.31.123: icmp_seq=28 ttl=51 time=448769.1 ms
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |