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mm/compaction: set compact_cached_free_pfn correctly in update_pageblock_skip

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Patch series "Fixes and cleanups to compaction", v2.

This series contains random fixes and cleanups to free page isolation in
compaction.  This is based on another compact series[1].  More details can
be found in respective patches.


This patch (of 4):

We will set skip to page block of block_start_pfn, it's more reasonable to
set compact_cached_free_pfn to page block before the block_start_pfn.

Link: https://lkml.kernel.org/r/20230803094901.2915942-1-shikemeng@huaweicloud.com
Link: https://lkml.kernel.org/r/20230803094901.2915942-2-shikemeng@huaweicloud.com
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Kemeng Shi <shikemeng@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Kemeng Shi 2023-08-03 17:48:58 +08:00 committed by Andrew Morton
parent 3a1060c261
commit 1695178900
1 changed files with 2 additions and 1 deletions
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3
mm/compaction.c
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@ -1717,7 +1717,8 @@ static void isolate_freepages(struct compact_control *cc)
/* Update the skip hint if the full pageblock was scanned */
if (isolate_start_pfn == block_end_pfn)
update_pageblock_skip(cc, page, block_start_pfn);
update_pageblock_skip(cc, page, block_start_pfn -
pageblock_nr_pages);
/* Are enough freepages isolated? */
if (cc->nr_freepages >= cc->nr_migratepages) {