[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <1184377014.15968.14.camel@dyn9047017100.beaverton.ibm.com>
Date: Fri, 13 Jul 2007 18:36:54 -0700
From: Badari Pulavarty <pbadari@...ibm.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Andreas Dilger <adilger@...sterfs.com>,
lkml <linux-kernel@...r.kernel.org>,
ext4 <linux-ext4@...r.kernel.org>
Subject: [PATCH] ext2 statfs improvement for block and inode free count
Andrew,
Can you include it in -mm ?
BTW, this patch is against mainline, won't apply cleanly to -mm, due to
other statfs() improvements.
Thanks,
Badari
More statfs() improvements for ext2. ext2 already maintains
percpu counters for free blocks and inodes. Derive free
block count and inode count by summing up percpu counters,
instead of counting up all the groups in the filesystem
each time.
Signed-off-by: Badari Pulavarty <pbadari@...ibm.com>
Acked-by: Andreas Dilger <adilger@...sterfs.com>
fs/ext2/super.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
Index: linux-2.6.22/fs/ext2/super.c
===================================================================
--- linux-2.6.22.orig/fs/ext2/super.c 2007-07-13 20:06:38.000000000 -0700
+++ linux-2.6.22/fs/ext2/super.c 2007-07-13 20:06:51.000000000 -0700
@@ -1136,12 +1136,12 @@ static int ext2_statfs (struct dentry *
buf->f_type = EXT2_SUPER_MAGIC;
buf->f_bsize = sb->s_blocksize;
buf->f_blocks = le32_to_cpu(es->s_blocks_count) - overhead;
- buf->f_bfree = ext2_count_free_blocks(sb);
+ buf->f_bfree = percpu_counter_sum(&sbi->s_freeblocks_counter);
buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count);
if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count))
buf->f_bavail = 0;
buf->f_files = le32_to_cpu(es->s_inodes_count);
- buf->f_ffree = ext2_count_free_inodes(sb);
+ buf->f_ffree = percpu_counter_sum(&sbi->s_freeinodes_counter);
buf->f_namelen = EXT2_NAME_LEN;
fsid = le64_to_cpup((void *)es->s_uuid) ^
le64_to_cpup((void *)es->s_uuid + sizeof(u64));
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists