[PATCH] cpuset memory spread page cache implementation and hooks

[karo-tx-linux.git] / mm / filemap.c

diff --git a/mm/filemap.c b/mm/filemap.c
index e8f58f7dd7a551cf9b1138b386af673f99bdc8a4..d4ff48ec269ea08529e5c467a079ae44554ddf6f 100644 (file)
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -29,6 +29,7 @@
 #include <linux/blkdev.h>
 #include <linux/security.h>
 #include <linux/syscalls.h>
+#include <linux/cpuset.h>
 #include "filemap.h"
 #include "internal.h"
 
@@ -427,6 +428,28 @@ int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
        return ret;
 }
 
+#ifdef CONFIG_NUMA
+struct page *page_cache_alloc(struct address_space *x)
+{
+       if (cpuset_do_page_mem_spread()) {
+               int n = cpuset_mem_spread_node();
+               return alloc_pages_node(n, mapping_gfp_mask(x), 0);
+       }
+       return alloc_pages(mapping_gfp_mask(x), 0);
+}
+EXPORT_SYMBOL(page_cache_alloc);
+
+struct page *page_cache_alloc_cold(struct address_space *x)
+{
+       if (cpuset_do_page_mem_spread()) {
+               int n = cpuset_mem_spread_node();
+               return alloc_pages_node(n, mapping_gfp_mask(x)|__GFP_COLD, 0);
+       }
+       return alloc_pages(mapping_gfp_mask(x)|__GFP_COLD, 0);
+}
+EXPORT_SYMBOL(page_cache_alloc_cold);
+#endif
+
 /*
  * In order to wait for pages to become available there must be
  * waitqueues associated with pages. By using a hash table of