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| author | Christoph Hellwig <hch@infradead.org> | 2010-01-20 21:55:30 +0000 |
|---|---|---|
| committer | Alex Elder <aelder@sgi.com> | 2010-01-21 13:44:56 -0600 |
| commit | bdfb04301fa5fdd95f219539a9a5b9663b1e5fc2 (patch) | |
| tree | 6d50b1c71d1f227cf1800ee0531a475266ef6da8 /fs/xfs/linux-2.6/kmem.c | |
| parent | a14a348bff2f99471a28e5928eb6801224c053d8 (diff) | |
| download | lwn-bdfb04301fa5fdd95f219539a9a5b9663b1e5fc2.tar.gz lwn-bdfb04301fa5fdd95f219539a9a5b9663b1e5fc2.zip | |
xfs: replace KM_LARGE with explicit vmalloc use
We use the KM_LARGE flag to make kmem_alloc and friends use vmalloc
if necessary. As we only need this for a few boot/mount time
allocations just switch to explicit vmalloc calls there.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/linux-2.6/kmem.c')
| -rw-r--r-- | fs/xfs/linux-2.6/kmem.c | 56 |
1 files changed, 20 insertions, 36 deletions
diff --git a/fs/xfs/linux-2.6/kmem.c b/fs/xfs/linux-2.6/kmem.c index 2d3f90afe5f1..bc7405585def 100644 --- a/fs/xfs/linux-2.6/kmem.c +++ b/fs/xfs/linux-2.6/kmem.c @@ -16,7 +16,6 @@ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include <linux/mm.h> -#include <linux/vmalloc.h> #include <linux/highmem.h> #include <linux/swap.h> #include <linux/blkdev.h> @@ -24,8 +23,25 @@ #include "time.h" #include "kmem.h" -#define MAX_VMALLOCS 6 -#define MAX_SLAB_SIZE 0x20000 +/* + * Greedy allocation. May fail and may return vmalloced memory. + * + * Must be freed using kmem_free_large. + */ +void * +kmem_zalloc_greedy(size_t *size, size_t minsize, size_t maxsize) +{ + void *ptr; + size_t kmsize = maxsize; + + while (!(ptr = kmem_zalloc_large(kmsize))) { + if ((kmsize >>= 1) <= minsize) + kmsize = minsize; + } + if (ptr) + *size = kmsize; + return ptr; +} void * kmem_alloc(size_t size, unsigned int __nocast flags) @@ -34,19 +50,8 @@ kmem_alloc(size_t size, unsigned int __nocast flags) gfp_t lflags = kmem_flags_convert(flags); void *ptr; -#ifdef DEBUG - if (unlikely(!(flags & KM_LARGE) && (size > PAGE_SIZE))) { - printk(KERN_WARNING "Large %s attempt, size=%ld\n", - __func__, (long)size); - dump_stack(); - } -#endif - do { - if (size < MAX_SLAB_SIZE || retries > MAX_VMALLOCS) - ptr = kmalloc(size, lflags); - else - ptr = __vmalloc(size, lflags, PAGE_KERNEL); + ptr = kmalloc(size, lflags); if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP))) return ptr; if (!(++retries % 100)) @@ -68,27 +73,6 @@ kmem_zalloc(size_t size, unsigned int __nocast flags) return ptr; } -void * -kmem_zalloc_greedy(size_t *size, size_t minsize, size_t maxsize, - unsigned int __nocast flags) -{ - void *ptr; - size_t kmsize = maxsize; - unsigned int kmflags = (flags & ~KM_SLEEP) | KM_NOSLEEP; - - while (!(ptr = kmem_zalloc(kmsize, kmflags))) { - if ((kmsize <= minsize) && (flags & KM_NOSLEEP)) - break; - if ((kmsize >>= 1) <= minsize) { - kmsize = minsize; - kmflags = flags; - } - } - if (ptr) - *size = kmsize; - return ptr; -} - void kmem_free(const void *ptr) { |