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jbd: use kmem_cache_zalloc for allocating journal head

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This commit tries to use kmem_cache_zalloc instead of kmem_cache_alloc/
memset when a new journal head is alloctated.

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Zheng Liu 2013-04-29 17:08:51 +08:00 committed by Jan Kara
parent e162b2f835
commit 8bb9da943a
1 changed files with 3 additions and 5 deletions
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8
fs/jbd/journal.c
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@ -1856,7 +1856,7 @@ static struct journal_head *journal_alloc_journal_head(void)
#ifdef CONFIG_JBD_DEBUG
atomic_inc(&nr_journal_heads);
#endif
ret = kmem_cache_alloc(journal_head_cache, GFP_NOFS);
ret = kmem_cache_zalloc(journal_head_cache, GFP_NOFS);
if (ret == NULL) {
jbd_debug(1, "out of memory for journal_head\n");
printk_ratelimited(KERN_NOTICE "ENOMEM in %s, retrying.\n",
@ -1864,7 +1864,7 @@ static struct journal_head *journal_alloc_journal_head(void)
while (ret == NULL) {
yield();
ret = kmem_cache_alloc(journal_head_cache, GFP_NOFS);
ret = kmem_cache_zalloc(journal_head_cache, GFP_NOFS);
}
}
return ret;
@ -1926,10 +1926,8 @@ struct journal_head *journal_add_journal_head(struct buffer_head *bh)
struct journal_head *new_jh = NULL;
repeat:
if (!buffer_jbd(bh)) {
if (!buffer_jbd(bh))
new_jh = journal_alloc_journal_head();
memset(new_jh, 0, sizeof(*new_jh));
}
jbd_lock_bh_journal_head(bh);
if (buffer_jbd(bh)) {