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ext4: Init the complete page while building buddy cache

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We need to init the complete page during buddy cache init
by setting the contents to '1'.  Otherwise we can see the
following errors after doing an online resize of the
filesystem:

EXT4-fs error (device sdb1): ext4_mb_mark_diskspace_used:
	Allocating block 1040385 in system zone of 127 group

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
This commit is contained in:
Aneesh Kumar K.V 2009-01-05 21:48:56 -05:00 committed by Theodore Ts'o
parent 8556e8f3b6
commit 29eaf02498
1 changed files with 2 additions and 1 deletions
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3
fs/ext4/mballoc.c
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@ -846,6 +846,8 @@ static int ext4_mb_init_cache(struct page *page, char *incore)
err = 0;
first_block = page->index * blocks_per_page;
/* init the page */
memset(page_address(page), 0xff, PAGE_CACHE_SIZE);
for (i = 0; i < blocks_per_page; i++) {
int group;
struct ext4_group_info *grinfo;
@ -872,7 +874,6 @@ static int ext4_mb_init_cache(struct page *page, char *incore)
BUG_ON(incore == NULL);
mb_debug("put buddy for group %u in page %lu/%x\n",
group, page->index, i * blocksize);
memset(data, 0xff, blocksize);
grinfo = ext4_get_group_info(sb, group);
grinfo->bb_fragments = 0;
memset(grinfo->bb_counters, 0,