Commit 8bb9da94 authored by Zheng Liu's avatar Zheng Liu Committed by Jan Kara
Browse files

jbd: use kmem_cache_zalloc for allocating journal head 



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

Signed-off-by: default avatarZheng Liu <wenqing.lz@taobao.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: default avatarJan Kara <jack@suse.cz>
parent e162b2f8

fs/jbd/journal.c

+3 −5
Original line number Diff line number Diff line
@@ -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)) {