Messages in this thread Patch in this message | | | Date | Wed, 10 Nov 2004 06:19:30 +0100 | From | Carl-Daniel Hailfinger <> | Subject | [RFC] [PATCH] kmem_alloc (generic wrapper for kmalloc and vmalloc) |
| |
Hi,
it seems there is a bunch of drivers which want to allocate memory as efficiently as possible in a wide range of allocation sizes. XFS and NTFS seem to be examples. Implement a generic wrapper to reduce code duplication. Functions have the my_ prefixes to avoid name clash with XFS.
Patch is compile tested
Comments/flames?
Regards, Carl-Daniel http://www.hailfinger.org/
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.kernel.2004@gmx.net>
--- ./linux-2.6.9/mm/slab.c~ 2004-11-05 14:27:49.000000000 +0100 +++ ./linux-2.6.9/mm/slab.c 2004-11-10 03:27:19.000000000 +0100 @@ -507,6 +507,8 @@ #undef CACHE };
+size_t MAX_KMALLOC_SIZE; + static struct arraycache_init initarray_cache __initdata = { { 0, BOOT_CPUCACHE_ENTRIES, 1, 0} }; static struct arraycache_init initarray_generic __initdata = @@ -728,6 +730,10 @@ struct cache_sizes *sizes; struct cache_names *names;
+#define CACHE(x) MAX_KMALLOC_SIZE = x; +#include <linux/kmalloc_sizes.h> +#undef CACHE + /* * Fragmentation resistance on low memory - only use bigger * page orders on machines with more than 32MB of memory. @@ -3039,3 +3045,25 @@
return size; } + +void * my_kmem_alloc(size_t size, int flags) +{ + void *ptr = NULL; + + if (size < MAX_KMALLOC_SIZE) + ptr = kmalloc(size, flags); + if (!ptr) + ptr = __vmalloc(size, flags, PAGE_KERNEL); + return ptr; +} + +void my_kmem_free(void *ptr) +{ + if (((unsigned long)ptr < VMALLOC_START) || + ((unsigned long)ptr >= VMALLOC_END)) { + kfree(ptr); + } else { + vfree(ptr); + } +} + - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |