From: Nick Piggin <npiggin@suse.de>
To: Andrew Morton <akpm@osdl.org>
Cc: Linux Memory Management List <linux-mm@kvack.org>
Subject: [patch] mm: slab less atomics
Date: Wed, 25 Jan 2006 10:19:27 +0100 [thread overview]
Message-ID: <20060125091927.GC32653@wotan.suse.de> (raw)
Atomic operation removal from slab
Signed-off-by: Nick Piggin <npiggin@suse.de>
Index: linux-2.6/mm/slab.c
===================================================================
--- linux-2.6.orig/mm/slab.c
+++ linux-2.6/mm/slab.c
@@ -1230,7 +1230,7 @@ static void *kmem_getpages(kmem_cache_t
atomic_add(i, &slab_reclaim_pages);
add_page_state(nr_slab, i);
while (i--) {
- SetPageSlab(page);
+ __SetPageSlab(page);
page++;
}
return addr;
@@ -1246,8 +1246,8 @@ static void kmem_freepages(kmem_cache_t
const unsigned long nr_freed = i;
while (i--) {
- if (!TestClearPageSlab(page))
- BUG();
+ BUG_ON(!PageSlab(page));
+ __ClearPageSlab(page);
page++;
}
sub_page_state(nr_slab, nr_freed);
Index: linux-2.6/include/linux/page-flags.h
===================================================================
--- linux-2.6.orig/include/linux/page-flags.h
+++ linux-2.6/include/linux/page-flags.h
@@ -255,10 +255,8 @@ extern void __mod_page_state_offset(unsi
#define __ClearPageActive(page) __clear_bit(PG_active, &(page)->flags)
#define PageSlab(page) test_bit(PG_slab, &(page)->flags)
-#define SetPageSlab(page) set_bit(PG_slab, &(page)->flags)
-#define ClearPageSlab(page) clear_bit(PG_slab, &(page)->flags)
-#define TestClearPageSlab(page) test_and_clear_bit(PG_slab, &(page)->flags)
-#define TestSetPageSlab(page) test_and_set_bit(PG_slab, &(page)->flags)
+#define __SetPageSlab(page) __set_bit(PG_slab, &(page)->flags)
+#define __ClearPageSlab(page) __clear_bit(PG_slab, &(page)->flags)
#ifdef CONFIG_HIGHMEM
#define PageHighMem(page) is_highmem(page_zone(page))
--
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reply other threads:[~2006-01-25 9:19 UTC|newest]
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