| 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
| ||
|
Message-Id: <20061121225403.11710.37011.sendpatchset@skynet.skynet.ie>
Date: Tue, 21 Nov 2006 22:54:03 +0000 (GMT)
From: Mel Gorman <mel@....ul.ie>
To: linux-mm@...ck.org
Cc: Mel Gorman <mel@....ul.ie>, linux-kernel@...r.kernel.org,
clameter@....com
Subject: [PATCH 11/11] Use pageblock flags for page clustering
This patch alters page clustering to use the pageblock bits for track how
movable a block of pages is.
Signed-off-by: Mel Gorman <mel@....ul.ie>
---
include/linux/pageblock-flags.h | 4 ++++
mm/page_alloc.c | 27 ++++++++++++++++++++++-----
2 files changed, 26 insertions(+), 5 deletions(-)
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.19-rc5-mm2-102_remove_clustering_flags/include/linux/pageblock-flags.h linux-2.6.19-rc5-mm2-103_clustering_pageblock/include/linux/pageblock-flags.h
--- linux-2.6.19-rc5-mm2-102_remove_clustering_flags/include/linux/pageblock-flags.h 2006-11-21 11:23:20.000000000 +0000
+++ linux-2.6.19-rc5-mm2-103_clustering_pageblock/include/linux/pageblock-flags.h 2006-11-21 11:27:10.000000000 +0000
@@ -27,6 +27,10 @@
/* Bit indices that affect a whole block of pages */
enum pageblock_bits {
+#ifdef CONFIG_PAGE_CLUSTERING
+ PB_migrate,
+ PB_migrate_end = (PB_migrate + 2) - 1, /* 2 bits for migrate types */
+#endif /* CONFIG_PAGE_CLUSTERING */
NR_PAGEBLOCK_BITS
};
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.19-rc5-mm2-102_remove_clustering_flags/mm/page_alloc.c linux-2.6.19-rc5-mm2-103_clustering_pageblock/mm/page_alloc.c
--- linux-2.6.19-rc5-mm2-102_remove_clustering_flags/mm/page_alloc.c 2006-11-21 11:52:50.000000000 +0000
+++ linux-2.6.19-rc5-mm2-103_clustering_pageblock/mm/page_alloc.c 2006-11-21 11:52:53.000000000 +0000
@@ -143,8 +143,15 @@ static unsigned long __initdata dma_rese
#endif /* CONFIG_ARCH_POPULATES_NODE_MAP */
#ifdef CONFIG_PAGE_CLUSTERING
-static inline int get_page_migratetype(struct page *page)
+static inline int get_pageblock_migratetype(struct page *page)
{
+ return get_pageblock_flags_group(page, PB_migrate, PB_migrate_end);
+}
+
+static void set_pageblock_migratetype(struct page *page, int migratetype)
+{
+ set_pageblock_flags_group(page, (unsigned long)migratetype,
+ PB_migrate, PB_migrate_end);
}
static inline int gfpflags_to_migratetype(gfp_t gfp_flags)
@@ -155,11 +162,15 @@ static inline int gfpflags_to_migratetyp
((gfp_flags & __GFP_RECLAIMABLE) != 0);
}
#else
-static inline int get_page_migratetype(struct page *page)
+static inline int get_pageblock_migratetype(struct page *page)
{
return MIGRATE_UNMOVABLE;
}
+static inline void set_pageblock_migratetype(struct page *page, int rclmtype)
+{
+}
+
static inline int gfpflags_to_migratetype(gfp_t gfp_flags)
{
return MIGRATE_UNMOVABLE;
@@ -435,7 +446,7 @@ static inline void __free_one_page(struc
{
unsigned long page_idx;
int order_size = 1 << order;
- int migratetype = get_page_migratetype(page);
+ int migratetype = get_pageblock_migratetype(page);
if (unlikely(PageCompound(page)))
destroy_compound_page(page, order);
@@ -715,6 +726,7 @@ int move_freepages_block(struct zone *zo
if (page_zone(page) != page_zone(end_page))
return 0;
+ set_pageblock_migratetype(start_page, migratetype);
return move_freepages(zone, start_page, end_page, migratetype);
}
@@ -834,6 +846,10 @@ static struct page *__rmqueue(struct zon
rmv_page_order(page);
area->nr_free--;
zone->free_pages -= 1UL << order;
+
+ if (current_order == MAX_ORDER - 1)
+ set_pageblock_migratetype(page, migratetype);
+
expand(zone, page, order, current_order, area, migratetype);
goto got_page;
}
@@ -1022,7 +1038,7 @@ static void fastcall free_hot_cold_page(
local_irq_save(flags);
__count_vm_event(PGFREE);
list_add(&page->lru, &pcp->list);
- set_page_private(page, get_page_migratetype(page));
+ set_page_private(page, get_pageblock_migratetype(page));
pcp->count++;
if (pcp->count >= pcp->high) {
free_pages_bulk(zone, pcp->batch, &pcp->list, 0);
@@ -2291,12 +2307,13 @@ void __meminit memmap_init_zone(unsigned
SetPageReserved(page);
/*
- * Mark the page movable so that blocks are reserved for
+ * Mark the block movable so that blocks are reserved for
* movable at startup. This will force kernel allocations
* to reserve their blocks rather than leaking throughout
* the address space during boot when many long-lived
* kernel allocations are made
*/
+ set_pageblock_migratetype(page, MIGRATE_MOVABLE);
INIT_LIST_HEAD(&page->lru);
#ifdef WANT_PAGE_VIRTUAL
-
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