From: William Lee Irwin III <wli@holomorphy.com>
To: linux-mm@kvack.org
Subject: [3/13] add __GFP_NOKILL to SLAB_KERNEL
Date: Wed, 25 Sep 2002 22:42:33 -0700 [thread overview]
Message-ID: <20020926054233.GJ22942@holomorphy.com> (raw)
Slab allocations are failable, hence any SLAB_KERNEL allocation should
be failed when not serviceable instead of killing innocent tasks. In
particular, vm_area_structs, temporary filename buffers (getname),
dentries, inodes, filp's, task_structs, and some others were all seen to
trigger the OOM killer. It seemed best to consolidate it in SLAB_KERNEL.
diff -urN linux-2.5.33/include/linux/slab.h linux-2.5.33-mm5/include/linux/slab.h
--- linux-2.5.33/include/linux/slab.h 2002-09-04 04:02:00.000000000 -0700
+++ linux-2.5.33-mm5/include/linux/slab.h 2002-09-08 20:55:27.000000000 -0700
@@ -20,10 +20,10 @@
#define SLAB_NOHIGHIO GFP_NOHIGHIO
#define SLAB_ATOMIC GFP_ATOMIC
#define SLAB_USER GFP_USER
-#define SLAB_KERNEL GFP_KERNEL
+#define SLAB_KERNEL (GFP_KERNEL | __GFP_NOKILL)
#define SLAB_DMA GFP_DMA
-#define SLAB_LEVEL_MASK (__GFP_WAIT|__GFP_HIGH|__GFP_IO|__GFP_HIGHIO|__GFP_FS)
+#define SLAB_LEVEL_MASK (__GFP_WAIT|__GFP_HIGH|__GFP_IO|__GFP_HIGHIO|__GFP_FS|__GFP_NOKILL)
#define SLAB_NO_GROW 0x00001000UL /* don't grow a cache */
/* flags to pass to kmem_cache_create().
--
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reply other threads:[~2002-09-26 5:42 UTC|newest]
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