From: Jens Axboe <axboe@fb.com>
Date: Sun, 8 Nov 2015 00:33:38 +0000 (-0700)
Subject: smalloc: only clear the bitmap, not the whole pool
X-Git-Tag: fio-2.2.12~23
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=9c3e13e3314da394698ca32f21cc46d46b7cfe47;ds=sidebyside

smalloc: only clear the bitmap, not the whole pool

This reduces startup time, and the memset() isn't useful nor
needed on the full range.

Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/smalloc.c b/smalloc.c
index 8412e751..5047cda5 100644
--- a/smalloc.c
+++ b/smalloc.c
@@ -213,9 +213,9 @@ static int add_pool(struct pool *pool, unsigned int alloc_size)
 	if (ptr == MAP_FAILED)
 		goto out_fail;
 
-	memset(ptr, 0, alloc_size);
 	pool->map = ptr;
 	pool->bitmap = (void *) ptr + (pool->nr_blocks * SMALLOC_BPL);
+	memset(pool->bitmap, 0, bitmap_blocks * sizeof(unsigned int));
 
 	pool->lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
 	if (!pool->lock)