Messages in this thread | | | Date | Wed, 5 Apr 2006 20:40:09 -0700 | From | Andrew Morton <> | Subject | Re: Respin: [PATCH] mm: limit lowmem_reserve |
| |
Con Kolivas <kernel@kolivas.org> wrote: > > On Thursday 06 April 2006 12:55, Con Kolivas wrote: > > On Thursday 06 April 2006 12:43, Andrew Morton wrote: > > > Con Kolivas <kernel@kolivas.org> wrote: > > > > It is possible with a low enough lowmem_reserve ratio to make > > > > zone_watermark_ok fail repeatedly if the lower_zone is small enough. > > > > > > Is that actually a problem? > > > > Every single call to get_page_from_freelist will call on zone reclaim. It > > seems a problem to me if every call to __alloc_pages will do that? > > every call to __alloc_pages of that zone I mean >
One would need to check with the NUMA guys. zone_reclaim() has a (lame-looking) timer in there to prevent it from doing too much work.
That, or I'm missing something. This problem wasn't particularly well described, sorry. - 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/
| |