From: Vlastimil Babka <vbabka@suse.cz>
To: Minchan Kim <minchan@kernel.org>
Cc: David Rientjes <rientjes@google.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Greg Thelen <gthelen@google.com>, Mel Gorman <mgorman@suse.de>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Michal Nazarewicz <mina86@mina86.com>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
Christoph Lameter <cl@linux.com>, Rik van Riel <riel@redhat.com>
Subject: Re: [PATCH 05/10] mm, compaction: remember position within pageblock in free pages scanner
Date: Wed, 11 Jun 2014 13:33:32 +0200 [thread overview]
Message-ID: <53983E8C.80207@suse.cz> (raw)
In-Reply-To: <20140611021213.GF15630@bbox>
On 06/11/2014 04:12 AM, Minchan Kim wrote:
>> >@@ -314,6 +315,9 @@ static unsigned long isolate_freepages_block(struct compact_control *cc,
>> > int isolated, i;
>> > struct page *page = cursor;
>> >
>> >+ /* Record how far we have got within the block */
>> >+ *start_pfn = blockpfn;
>> >+
> Couldn't we move this out of the loop for just one store?
You mean using a local variable inside the loop, and assigning once, for
performance reasons (register vs memory access)?
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next prev parent reply other threads:[~2014-06-11 11:33 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-09 9:26 [PATCH 01/10] mm, compaction: do not recheck suitable_migration_target under lock Vlastimil Babka
2014-06-09 9:26 ` [PATCH 02/10] mm, compaction: report compaction as contended only due to lock contention Vlastimil Babka
2014-06-09 23:50 ` David Rientjes
2014-06-10 7:11 ` Vlastimil Babka
2014-06-10 23:40 ` David Rientjes
2014-06-11 1:10 ` Minchan Kim
2014-06-11 12:22 ` Vlastimil Babka
2014-06-11 23:49 ` Minchan Kim
2014-06-12 14:02 ` Vlastimil Babka
2014-06-13 2:40 ` Minchan Kim
2014-06-20 11:47 ` Vlastimil Babka
2014-06-09 9:26 ` [PATCH 03/10] mm, compaction: periodically drop lock and restore IRQs in scanners Vlastimil Babka
2014-06-09 23:58 ` David Rientjes
2014-06-10 7:15 ` Vlastimil Babka
2014-06-10 23:41 ` David Rientjes
2014-06-11 1:32 ` Minchan Kim
2014-06-11 11:24 ` Vlastimil Babka
2014-06-09 9:26 ` [PATCH 04/10] mm, compaction: skip rechecks when lock was already held Vlastimil Babka
2014-06-10 0:00 ` David Rientjes
2014-06-11 1:50 ` Minchan Kim
2014-06-09 9:26 ` [PATCH 05/10] mm, compaction: remember position within pageblock in free pages scanner Vlastimil Babka
2014-06-10 0:07 ` David Rientjes
2014-06-11 2:12 ` Minchan Kim
2014-06-11 8:16 ` Joonsoo Kim
2014-06-11 11:41 ` Vlastimil Babka
2014-06-11 11:33 ` Vlastimil Babka [this message]
2014-06-11 3:29 ` Zhang Yanfei
2014-06-09 9:26 ` [PATCH 06/10] mm, compaction: skip buddy pages by their order in the migrate scanner Vlastimil Babka
2014-06-10 0:08 ` David Rientjes
2014-06-09 9:26 ` [PATCH 07/10] mm: rename allocflags_to_migratetype for clarity Vlastimil Babka
2014-06-11 2:41 ` Minchan Kim
2014-06-11 3:38 ` Zhang Yanfei
2014-06-09 9:26 ` [PATCH 08/10] mm, compaction: pass gfp mask to compact_control Vlastimil Babka
2014-06-11 2:48 ` Minchan Kim
2014-06-11 11:46 ` Vlastimil Babka
2014-06-12 0:24 ` David Rientjes
2014-06-09 9:26 ` [RFC PATCH 09/10] mm, compaction: try to capture the just-created high-order freepage Vlastimil Babka
2014-06-11 14:56 ` Vlastimil Babka
2014-06-12 2:20 ` Minchan Kim
2014-06-12 8:21 ` Vlastimil Babka
2014-06-09 9:26 ` [RFC PATCH 10/10] mm, compaction: do not migrate pages when that cannot satisfy page fault allocation Vlastimil Babka
2014-06-09 23:41 ` [PATCH 01/10] mm, compaction: do not recheck suitable_migration_target under lock David Rientjes
2014-06-11 0:33 ` Minchan Kim
2014-06-11 2:45 ` Zhang Yanfei
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