From: Tao Ma <boyu.mt@xxxxxxxxxx> In __ext4_get_inode_loc, we calculate inodes_per_block every time by EXT4_BLOCK_SIZE(sb) / EXT4_INODE_SIZE(sb). AFAICS, this function is really a hot path for ext4, so we'd better use s_inodes_per_block directly instead of calculating every time. Signed-off-by: Tao Ma <boyu.mt@xxxxxxxxxx> --- fs/ext4/inode.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 1a86282..326efd9 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4605,7 +4605,7 @@ static int __ext4_get_inode_loc(struct inode *inode, /* * Figure out the offset within the block group inode table */ - inodes_per_block = (EXT4_BLOCK_SIZE(sb) / EXT4_INODE_SIZE(sb)); + inodes_per_block = EXT4_SB(sb)->s_inodes_per_block; inode_offset = ((inode->i_ino - 1) % EXT4_INODES_PER_GROUP(sb)); block = ext4_inode_table(sb, gdp) + (inode_offset / inodes_per_block); -- 1.7.4 -- 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
