[XFS] Add a greedy allocation interface, allocating within a min/max size
range.
SGI-PV: 955302
SGI-Modid: xfs-linux-melb:xfs-kern:26803a
Signed-off-by: Nathan Scott <nathans@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
diff --git a/fs/xfs/linux-2.6/kmem.c b/fs/xfs/linux-2.6/kmem.c
index f77fe5c..80b9340 100644
--- a/fs/xfs/linux-2.6/kmem.c
+++ b/fs/xfs/linux-2.6/kmem.c
@@ -68,6 +68,22 @@
return ptr;
}
+void *
+kmem_zalloc_greedy(size_t *size, size_t minsize, size_t maxsize,
+ unsigned int __nocast flags)
+{
+ void *ptr;
+
+ while (!(ptr = kmem_zalloc(maxsize, flags))) {
+ if ((maxsize >>= 1) <= minsize) {
+ maxsize = minsize;
+ flags = KM_SLEEP;
+ }
+ }
+ *size = maxsize;
+ return ptr;
+}
+
void
kmem_free(void *ptr, size_t size)
{