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Message-Id: <1367226507-2990-1-git-send-email-wenqing.lz@taobao.com> Date: Mon, 29 Apr 2013 17:08:27 +0800 From: Zheng Liu <gnehzuil.liu@...il.com> To: linux-ext4@...r.kernel.org Cc: Zheng Liu <wenqing.lz@...bao.com>, "Theodore Ts'o" <tytso@....edu> Subject: [PATCH] jbd2: use kmem_cache_zalloc for allocating journal head From: Zheng Liu <wenqing.lz@...bao.com> 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@...bao.com> Cc: "Theodore Ts'o" <tytso@....edu> --- Hi Ted, This patch could be folded into the commit: (28daf4fa) jbd2: use kmem_cache_zalloc instead of kmem_cache_alloc/memset Regards, - Zheng fs/jbd2/journal.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index a62f57a..e90c0bf 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -2327,13 +2327,13 @@ static struct journal_head *journal_alloc_journal_head(void) #ifdef CONFIG_JBD2_DEBUG atomic_inc(&nr_journal_heads); #endif - ret = kmem_cache_alloc(jbd2_journal_head_cache, GFP_NOFS); + ret = kmem_cache_zalloc(jbd2_journal_head_cache, GFP_NOFS); if (!ret) { jbd_debug(1, "out of memory for journal_head\n"); pr_notice_ratelimited("ENOMEM in %s, retrying.\n", __func__); while (!ret) { yield(); - ret = kmem_cache_alloc(jbd2_journal_head_cache, GFP_NOFS); + ret = kmem_cache_zalloc(jbd2_journal_head_cache, GFP_NOFS); } } return ret; @@ -2395,10 +2395,8 @@ struct journal_head *jbd2_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)) { -- 1.7.12.rc2.18.g61b472e -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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