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Subject[PATCH 47/49] jbd2: Mark jbd2 slabs as SLAB_TEMPORARY
Date
From: Mingming Cao <cmm@us.ibm.com>

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>
---
fs/jbd2/journal.c | 4 ++--
fs/jbd2/revoke.c | 6 ++++--
2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index f8b0f8c..8301e8d 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1975,7 +1975,7 @@ 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) {
@@ -2271,7 +2271,7 @@ 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 3595fd4..df36f42 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;
--
1.5.4.rc3.31.g1271-dirty


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