From mboxrd@z Thu Jan 1 00:00:00 1970 From: akpm@linux-foundation.org Subject: [merged] mm-compaction-pass-only-pageblock-aligned-range-to-pageblock_pfn_to_page.patch removed from -mm tree Date: Wed, 16 Mar 2016 12:57:16 -0700 Message-ID: <56e9ba9c.jQ8OKxxO648q3k+C%akpm@linux-foundation.org> Reply-To: linux-kernel@vger.kernel.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Received: from mail.linuxfoundation.org ([140.211.169.12]:39115 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934390AbcCPT5R (ORCPT ); Wed, 16 Mar 2016 15:57:17 -0400 Sender: mm-commits-owner@vger.kernel.org List-Id: mm-commits@vger.kernel.org To: iamjoonsoo.kim@lge.com, aaron.lu@intel.com, mgorman@suse.de, riel@redhat.com, rientjes@google.com, vbabka@suse.cz, mm-commits@vger.kernel.org The patch titled Subject: mm/compaction: pass only pageblock aligned range to pageblock_pfn_to_page has been removed from the -mm tree. Its filename was mm-compaction-pass-only-pageblock-aligned-range-to-pageblock_pfn_to_page.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Joonsoo Kim Subject: mm/compaction: pass only pageblock aligned range to pageblock_pfn_to_page pageblock_pfn_to_page() is used to check there is valid pfn and all pages in the pageblock is in a single zone. If there is a hole in the pageblock, passing arbitrary position to pageblock_pfn_to_page() could cause to skip whole pageblock scanning, instead of just skipping the hole page. For deterministic behaviour, it's better to always pass pageblock aligned range to pageblock_pfn_to_page(). It will also help further optimization on pageblock_pfn_to_page() in the following patch. Signed-off-by: Joonsoo Kim Cc: Aaron Lu Cc: David Rientjes Cc: Mel Gorman Cc: Rik van Riel Acked-by: Vlastimil Babka Signed-off-by: Andrew Morton --- mm/compaction.c | 41 ++++++++++++++++++++++++++++++----------- 1 file changed, 30 insertions(+), 11 deletions(-) diff -puN mm/compaction.c~mm-compaction-pass-only-pageblock-aligned-range-to-pageblock_pfn_to_page mm/compaction.c --- a/mm/compaction.c~mm-compaction-pass-only-pageblock-aligned-range-to-pageblock_pfn_to_page +++ a/mm/compaction.c @@ -555,13 +555,17 @@ unsigned long isolate_freepages_range(struct compact_control *cc, unsigned long start_pfn, unsigned long end_pfn) { - unsigned long isolated, pfn, block_end_pfn; + unsigned long isolated, pfn, block_start_pfn, block_end_pfn; LIST_HEAD(freelist); pfn = start_pfn; + block_start_pfn = pfn & ~(pageblock_nr_pages - 1); + if (block_start_pfn < cc->zone->zone_start_pfn) + block_start_pfn = cc->zone->zone_start_pfn; block_end_pfn = ALIGN(pfn + 1, pageblock_nr_pages); for (; pfn < end_pfn; pfn += isolated, + block_start_pfn = block_end_pfn, block_end_pfn += pageblock_nr_pages) { /* Protect pfn from changing by isolate_freepages_block */ unsigned long isolate_start_pfn = pfn; @@ -574,11 +578,13 @@ isolate_freepages_range(struct compact_c * scanning range to right one. */ if (pfn >= block_end_pfn) { + block_start_pfn = pfn & ~(pageblock_nr_pages - 1); block_end_pfn = ALIGN(pfn + 1, pageblock_nr_pages); block_end_pfn = min(block_end_pfn, end_pfn); } - if (!pageblock_pfn_to_page(pfn, block_end_pfn, cc->zone)) + if (!pageblock_pfn_to_page(block_start_pfn, + block_end_pfn, cc->zone)) break; isolated = isolate_freepages_block(cc, &isolate_start_pfn, @@ -864,18 +870,23 @@ unsigned long isolate_migratepages_range(struct compact_control *cc, unsigned long start_pfn, unsigned long end_pfn) { - unsigned long pfn, block_end_pfn; + unsigned long pfn, block_start_pfn, block_end_pfn; /* Scan block by block. First and last block may be incomplete */ pfn = start_pfn; + block_start_pfn = pfn & ~(pageblock_nr_pages - 1); + if (block_start_pfn < cc->zone->zone_start_pfn) + block_start_pfn = cc->zone->zone_start_pfn; block_end_pfn = ALIGN(pfn + 1, pageblock_nr_pages); for (; pfn < end_pfn; pfn = block_end_pfn, + block_start_pfn = block_end_pfn, block_end_pfn += pageblock_nr_pages) { block_end_pfn = min(block_end_pfn, end_pfn); - if (!pageblock_pfn_to_page(pfn, block_end_pfn, cc->zone)) + if (!pageblock_pfn_to_page(block_start_pfn, + block_end_pfn, cc->zone)) continue; pfn = isolate_migratepages_block(cc, pfn, block_end_pfn, @@ -1104,7 +1115,9 @@ int sysctl_compact_unevictable_allowed _ static isolate_migrate_t isolate_migratepages(struct zone *zone, struct compact_control *cc) { - unsigned long low_pfn, end_pfn; + unsigned long block_start_pfn; + unsigned long block_end_pfn; + unsigned long low_pfn; unsigned long isolate_start_pfn; struct page *page; const isolate_mode_t isolate_mode = @@ -1116,16 +1129,21 @@ static isolate_migrate_t isolate_migrate * initialized by compact_zone() */ low_pfn = cc->migrate_pfn; + block_start_pfn = cc->migrate_pfn & ~(pageblock_nr_pages - 1); + if (block_start_pfn < zone->zone_start_pfn) + block_start_pfn = zone->zone_start_pfn; /* Only scan within a pageblock boundary */ - end_pfn = ALIGN(low_pfn + 1, pageblock_nr_pages); + block_end_pfn = ALIGN(low_pfn + 1, pageblock_nr_pages); /* * Iterate over whole pageblocks until we find the first suitable. * Do not cross the free scanner. */ - for (; end_pfn <= cc->free_pfn; - low_pfn = end_pfn, end_pfn += pageblock_nr_pages) { + for (; block_end_pfn <= cc->free_pfn; + low_pfn = block_end_pfn, + block_start_pfn = block_end_pfn, + block_end_pfn += pageblock_nr_pages) { /* * This can potentially iterate a massively long zone with @@ -1136,7 +1154,8 @@ static isolate_migrate_t isolate_migrate && compact_should_abort(cc)) break; - page = pageblock_pfn_to_page(low_pfn, end_pfn, zone); + page = pageblock_pfn_to_page(block_start_pfn, block_end_pfn, + zone); if (!page) continue; @@ -1155,8 +1174,8 @@ static isolate_migrate_t isolate_migrate /* Perform the isolation */ isolate_start_pfn = low_pfn; - low_pfn = isolate_migratepages_block(cc, low_pfn, end_pfn, - isolate_mode); + low_pfn = isolate_migratepages_block(cc, low_pfn, + block_end_pfn, isolate_mode); if (!low_pfn || cc->contended) { acct_isolated(zone, cc); _ Patches currently in -mm which might be from iamjoonsoo.kim@lge.com are mm-vmalloc-query-dynamic-debug_pagealloc-setting.patch mm-slub-query-dynamic-debug_pagealloc-setting.patch mm-slub-query-dynamic-debug_pagealloc-setting-v2.patch sound-query-dynamic-debug_pagealloc-setting.patch powerpc-query-dynamic-debug_pagealloc-setting.patch tile-query-dynamic-debug_pagealloc-setting.patch mm-introduce-page-reference-manipulation-functions.patch mm-page_ref-add-tracepoint-to-track-down-page-reference-manipulation.patch mm-page_ref-add-tracepoint-to-track-down-page-reference-manipulation-fix-3.patch