diff options
| author | David Disseldorp <ddiss@suse.de> | 2020-03-27 15:19:52 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-03-29 18:10:59 -0400 |
| commit | 0ad08996da05b6b735d4963dceab7d2a4043607c (patch) | |
| tree | d8c812da2732e13429e491c779e0f82a9a97e847 /drivers/target/target_core_xcopy.h | |
| parent | 267fc83f8836ad6168ed264a0823543439abb3be (diff) | |
scsi: target: avoid per-loop XCOPY buffer allocations
The main target_xcopy_do_work() loop unnecessarily allocates an I/O buffer
with each synchronous READ / WRITE pair. This commit significantly reduces
allocations by reusing the XCOPY I/O buffer when possible.
Link: https://lore.kernel.org/r/20200327141954.955-4-ddiss@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David Disseldorp <ddiss@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/target/target_core_xcopy.h')
| -rw-r--r-- | drivers/target/target_core_xcopy.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/target/target_core_xcopy.h b/drivers/target/target_core_xcopy.h index 0840b03e8faa..9558974185ea 100644 --- a/drivers/target/target_core_xcopy.h +++ b/drivers/target/target_core_xcopy.h @@ -39,6 +39,7 @@ struct xcopy_op { struct xcopy_pt_cmd *src_pt_cmd; struct xcopy_pt_cmd *dst_pt_cmd; + u32 xop_data_bytes; u32 xop_data_nents; struct scatterlist *xop_data_sg; struct work_struct xop_work; |