On Mon, Jun 27, 2011 at 06:45:13PM +0800, Robin Dong wrote:
> Subject: [PATCH v2] ext4: avoid redundant cache finding if flags not cantian
I suspect you mean "contain" as opposed to "cantian".
> In old code, ext4 will find extent in cache first even flags does
> not contian PUNCH_OUT, that may waste some time.
Same here ("contian").
--D
>
> Signed-off-by: Robin Dong <sanbai@xxxxxxxxxx>
> Reviewed-by: Lukas Czerner <lczerner@xxxxxxxxxx>
> ---
> fs/ext4/extents.c | 4 ++--
> 1 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
> index eb63c7b..fed2633 100644
> --- a/fs/ext4/extents.c
> +++ b/fs/ext4/extents.c
> @@ -3358,8 +3358,8 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
> trace_ext4_ext_map_blocks_enter(inode, map->m_lblk, map->m_len, flags);
>
> /* check in cache */
> - if (ext4_ext_in_cache(inode, map->m_lblk, &newex) &&
> - ((flags & EXT4_GET_BLOCKS_PUNCH_OUT_EXT) == 0)) {
> + if (!(flags & EXT4_GET_BLOCKS_PUNCH_OUT_EXT) &&
> + ext4_ext_in_cache(inode, map->m_lblk, &newex)) {
> if (!newex.ee_start_lo && !newex.ee_start_hi) {
> if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) {
> /*
> --
> 1.7.1
>
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