diff options
| author | Omar Sandoval <osandov@fb.com> | 2020-08-21 10:39:52 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-10-07 13:13:17 +0300 |
| commit | 8c7d9fe06f5bb87dce356dcc9ea7c003b529e6ba (patch) | |
| tree | 0a4f7cfc7e9671dd2c2a4b81a3b528bbbb91ea28 /fs/btrfs/send.h | |
| parent | a9b2e0de92cbed84b9bca1464babaf1d67a5542b (diff) | |
| download | linux-8c7d9fe06f5bb87dce356dcc9ea7c003b529e6ba.tar.xz | |
btrfs: send: avoid copying file data
send_write() currently copies from the page cache to sctx->read_buf, and
then from sctx->read_buf to sctx->send_buf. Similarly, send_hole()
zeroes sctx->read_buf and then copies from sctx->read_buf to
sctx->send_buf. However, if we write the TLV header manually, we can
copy to sctx->send_buf directly and get rid of sctx->read_buf.
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/send.h')
| -rw-r--r-- | fs/btrfs/send.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/btrfs/send.h b/fs/btrfs/send.h index ead397f7034f..de91488b7cd0 100644 --- a/fs/btrfs/send.h +++ b/fs/btrfs/send.h @@ -13,7 +13,6 @@ #define BTRFS_SEND_STREAM_VERSION 1 #define BTRFS_SEND_BUF_SIZE SZ_64K -#define BTRFS_SEND_READ_SIZE (48 * SZ_1K) enum btrfs_tlv_type { BTRFS_TLV_U8, |