| 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: Fri, 25 Jul 2014 16:38:59 +0100 From: Mel Gorman <mgorman@...e.de> To: David Rientjes <rientjes@...gle.com> Cc: Andrew Morton <akpm@...ux-foundation.org>, Rik van Riel <riel@...hat.com>, Johannes Weiner <hannes@...xchg.org>, linux-kernel@...r.kernel.org, linux-mm@...ck.org Subject: Re: [patch] mm, thp: restructure thp avoidance of light synchronous migration On Thu, Jul 24, 2014 at 03:41:06PM -0700, David Rientjes wrote: > __GFP_NO_KSWAPD, once the way to determine if an allocation was for thp or not, > has gained more users. Their use is not necessarily wrong, they are trying to > do a memory allocation that can easily fail without disturbing kswapd, so the > bit has gained additional usecases. > > This restructures the check to determine whether MIGRATE_SYNC_LIGHT should be > used for memory compaction in the page allocator. Rather than testing solely > for __GFP_NO_KSWAPD, test for all bits that must be set for thp allocations. > > This also moves the check to be done only after the page allocator is aborted > for deferred or contended memory compaction since setting migration_mode for > this case is pointless. > > Signed-off-by: David Rientjes <rientjes@...gle.com> Acked-by: Mel Gorman <mgorman@...e.de> -- Mel Gorman SUSE Labs -- 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