diff options
| author | John Garry <john.garry@huawei.com> | 2019-05-29 17:58:44 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-06-18 19:46:24 -0400 |
| commit | c7669f50121ac43d33fe8fe7c38f737c6c35e323 (patch) | |
| tree | 670a9626812eea646a31a690aa24797ee23ba2f0 /mm | |
| parent | 794327ab53cc6b330774d6fdb93b547666583db9 (diff) | |
| download | linux-c7669f50121ac43d33fe8fe7c38f737c6c35e323.tar.bz2 | |
scsi: hisi_sas: Reduce HISI_SAS_SGE_PAGE_CNT in size
Macro HISI_SAS_SGE_PAGE_CNT is defined to SG_CHUNK_SIZE, which is 128.
This means that sizeof(struct hisi_sas_slot_buf_table) is 4192. This is
just over a 4K, which can mean inefficient DMA memory usage (for no PI).
Reduce the size of HISI_SAS_SGE_PAGE_CNT to 124 to fit in a 4K page. With
this change, we experience no performance hit.
Cc: dann frazier <dann.frazier@canonical.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions