jbd2: Mark jbd2 slabs as SLAB_TEMPORARY

This patch marks slab allocations by jbd2 as short-lived in support of
Mel Gorman's "Group short-lived and reclaimable kernel allocations"
patch.  (Ported from similar changes made to fs/jbd/journal.c and
fs/jbd/revoke.c in Mel's patch.)

Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

2 files changed, 6 insertions, 4 deletions

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 59ba2494dcaf..96ba846992e9 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1973,7 +1973,7 @@ static int journal_init_jbd2_journal_head_cache(void)
         jbd2_journal_head_cache = kmem_cache_create("jbd2_journal_head",
                                 sizeof(struct journal_head),
                                 0,              /* offset */
-                                0,              /* flags */
+                                SLAB_TEMPORARY, /* flags */
                                 NULL);          /* ctor */
         retval = 0;
         if (jbd2_journal_head_cache == 0) {
@@ -2269,7 +2269,7 @@ static int __init journal_init_handle_cache(void)
         jbd2_handle_cache = kmem_cache_create("jbd2_journal_handle",
                                 sizeof(handle_t),
                                 0,              /* offset */
-                                0,              /* flags */
+                                SLAB_TEMPORARY, /* flags */
                                 NULL);          /* ctor */
         if (jbd2_handle_cache == NULL) {
                 printk(KERN_EMERG "JBD: failed to create handle cache\n");
diff --git a/fs/jbd2/revoke.c b/fs/jbd2/revoke.c
index 3595fd432d5b..df36f42e19e1 100644
--- a/fs/jbd2/revoke.c
+++ b/fs/jbd2/revoke.c
@@ -171,13 +171,15 @@ int __init jbd2_journal_init_revoke_caches(void)
 {
         jbd2_revoke_record_cache = kmem_cache_create("jbd2_revoke_record",
                                            sizeof(struct jbd2_revoke_record_s),
-                                           0, SLAB_HWCACHE_ALIGN, NULL);
+                                           0,
+                                           SLAB_HWCACHE_ALIGN|SLAB_TEMPORARY,
+                                           NULL);
         if (jbd2_revoke_record_cache == 0)
                 return -ENOMEM;
 
         jbd2_revoke_table_cache = kmem_cache_create("jbd2_revoke_table",
                                            sizeof(struct jbd2_revoke_table_s),
-                                           0, 0, NULL);
+                                           0, SLAB_TEMPORARY, NULL);
         if (jbd2_revoke_table_cache == 0) {
                 kmem_cache_destroy(jbd2_revoke_record_cache);
                 jbd2_revoke_record_cache = NULL;