forge/linux-uconsole
1
0
Fork 0
Code Issues 1 Pull requests Projects Releases Packages Wiki Activity Actions

ext4: remove redundant mb_regenerate_buddy()

Browse source 
[ Upstream commit 6bd97bf273 ]

After this patch (163a203), if an abnormal bitmap is detected, we
will mark the group as corrupt, and we will not use this group in
the future. Therefore, it should be meaningless to regenerate the
buddy bitmap of this group, It might be better to delete it.

Signed-off-by: Chunguang Xu <brookxu@tencent.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Link: https://lore.kernel.org/r/1604764698-4269-2-git-send-email-brookxu@tencent.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Stable-dep-of: 5354b2af34 ("ext4: allow ext4_get_group_info() to fail")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chunguang Xu 2020-11-07 23:58:12 +08:00 • committed by Greg Kroah-Hartman
commit 0983142c5f
1 changed files with 0 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

19
fs/ext4/mballoc.c
View file

@ -822,24 +822,6 @@ void ext4_mb_generate_buddy(struct super_block *sb,
spin_unlock(&sbi->s_bal_lock);
}
static void mb_regenerate_buddy(struct ext4_buddy *e4b)
{
int count;
int order = 1;
void *buddy;
while ((buddy = mb_find_buddy(e4b, order++, &count))) {
ext4_set_bits(buddy, 0, count);
}
e4b->bd_info->bb_fragments = 0;
memset(e4b->bd_info->bb_counters, 0,
sizeof(*e4b->bd_info->bb_counters) *
(e4b->bd_sb->s_blocksize_bits + 2));
ext4_mb_generate_buddy(e4b->bd_sb, e4b->bd_buddy,
e4b->bd_bitmap, e4b->bd_group);
}
/* The buddy information is attached the buddy cache inode
* for convenience. The information regarding each group
* is loaded via ext4_mb_load_buddy. The information involve
@ -1512,7 +1494,6 @@ static void mb_free_blocks(struct inode *inode, struct ext4_buddy *e4b,
sb, e4b->bd_group,
EXT4_GROUP_INFO_BBITMAP_CORRUPT);
}
mb_regenerate_buddy(e4b);
goto done;
}