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@xxxxxxxxxx> Acked-by: Andreas Dilger <adilger@xxxxxxxxxxxxx> 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-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
