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| author | Mingming Cao <cmm@us.ibm.com> | 2006-12-06 20:38:18 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-07 08:39:39 -0800 |
| commit | 2bd94bd79e5bfa217714f78e5d6d7b6517ca546f (patch) | |
| tree | 825e9764b6e62492fddd8f14694b09a44e0ecb0a /fs/ext3/balloc.c | |
| parent | 02316067852187b8bec781bec07410e91af79627 (diff) | |
| download | linux-2bd94bd79e5bfa217714f78e5d6d7b6517ca546f.tar.gz linux-2bd94bd79e5bfa217714f78e5d6d7b6517ca546f.tar.bz2 linux-2bd94bd79e5bfa217714f78e5d6d7b6517ca546f.zip | |
[PATCH] ext3: fix reservation extension
Hugh Dickins wrote:
> Not found anything relevant, but I keep noticing these lines
> in ext2_try_to_allocate_with_rsv(), ext3 and ext4 similar:
>
> } else if (grp_goal > 0 &&
> (my_rsv->rsv_end - grp_goal + 1) < *count)
> try_to_extend_reservation(my_rsv, sb,
> *count-my_rsv->rsv_end + grp_goal - 1);
>
> They're wrong, a no-op in most groups, aren't they? rsv_end is an
> absolute block number, whereas grp_goal is group-relative, so the
> calculation ought to bring in group_first_block? Or I'm confused.
>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Cc: "linux-ext4@vger.kernel.org" <linux-ext4@vger.kernel.org>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/ext3/balloc.c')
| -rw-r--r-- | fs/ext3/balloc.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/fs/ext3/balloc.c b/fs/ext3/balloc.c index b41a7d7e20f0..f96c40a90e2e 100644 --- a/fs/ext3/balloc.c +++ b/fs/ext3/balloc.c @@ -1307,10 +1307,14 @@ ext3_try_to_allocate_with_rsv(struct super_block *sb, handle_t *handle, if (!goal_in_my_reservation(&my_rsv->rsv_window, grp_goal, group, sb)) grp_goal = -1; - } else if (grp_goal > 0 && - (my_rsv->rsv_end-grp_goal+1) < *count) - try_to_extend_reservation(my_rsv, sb, - *count-my_rsv->rsv_end + grp_goal - 1); + } else if (grp_goal > 0) { + int curr = my_rsv->rsv_end - + (grp_goal + group_first_block) + 1; + + if (curr < *count) + try_to_extend_reservation(my_rsv, sb, + *count - curr); + } if ((my_rsv->rsv_start > group_last_block) || (my_rsv->rsv_end < group_first_block)) { |