lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 24 Mar 2010 11:10:14 +0900 From: Minchan Kim <minchan.kim@...il.com> To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> Cc: Mel Gorman <mel@....ul.ie>, Andrew Morton <akpm@...ux-foundation.org>, Andrea Arcangeli <aarcange@...hat.com>, Christoph Lameter <cl@...ux-foundation.org>, Adam Litke <agl@...ibm.com>, Avi Kivity <avi@...hat.com>, David Rientjes <rientjes@...gle.com>, KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>, Rik van Riel <riel@...hat.com>, linux-kernel@...r.kernel.org, linux-mm@...ck.org Subject: Re: [PATCH 07/11] Memory compaction core On Wed, Mar 24, 2010 at 10:53 AM, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote: > On Wed, 24 Mar 2010 10:47:41 +0900 > Minchan Kim <minchan.kim@...il.com> wrote: > >> On Wed, Mar 24, 2010 at 10:03 AM, KAMEZAWA Hiroyuki >> <kamezawa.hiroyu@...fujitsu.com> wrote: >> > On Tue, 23 Mar 2010 12:25:42 +0000 >> > Mel Gorman <mel@....ul.ie> wrote: >> > >> >> This patch is the core of a mechanism which compacts memory in a zone by >> >> relocating movable pages towards the end of the zone. >> >> >> >> A single compaction run involves a migration scanner and a free scanner. >> >> Both scanners operate on pageblock-sized areas in the zone. The migration >> >> scanner starts at the bottom of the zone and searches for all movable pages >> >> within each area, isolating them onto a private list called migratelist. >> >> The free scanner starts at the top of the zone and searches for suitable >> >> areas and consumes the free pages within making them available for the >> >> migration scanner. The pages isolated for migration are then migrated to >> >> the newly isolated free pages. >> >> >> >> Signed-off-by: Mel Gorman <mel@....ul.ie> >> >> Acked-by: Rik van Riel <riel@...hat.com> >> >> Reviewed-by: Minchan Kim <minchan.kim@...il.com> >> > >> > I think lru_add_drain() or lru_add_drain_all() should be called somewhere >> > when we do __isolate_lru_page(). But it's (_all is) slow.... >> > >> >> migrate_prep does it. >> > Thanks. > > Hmm...then, lru_add_drain_all() is called at each (32page migrate) itelation. > Isn't it too slow to be called in such frequency ? I agree. We can move migrate_prep in compact_zone. > > Thanks, > -Kame > > > > > -- Kind regards, Minchan Kim -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists