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| author | James Smart <jsmart2021@gmail.com> | 2018-09-10 10:30:42 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-09-11 20:37:33 -0400 |
| commit | 5b9e70b22cc5927e29871492d801155373682b55 (patch) | |
| tree | 2f00c2af132fb33eaf8c19949c3b2ddd6b380aba /drivers/scsi/storvsc_drv.c | |
| parent | 01a8aed6a009625282b6265880f6b20cbd7a9c70 (diff) | |
scsi: lpfc: raise sg count for nvme to use available sg resources
The driver allocates a sg list per io struture based on a fixed maximum
size. When it registers with the protocol transports and indicates the max sg
list size it supports, the driver manipulates the fixed value to report a
lesser amount so that it has reserved space for sg elements that are used for
DIF.
The driver initialization path sets the cfg_sg_seg_cnt field to the
manipulated value for scsi. NVME initialization ran afterward and capped it's
maximum by the manipulated value for SCSI. This erroneously made NVME report
the SCSI-reduce-for-DIF value that reduced the max io size for nvme and wasted
sg elements.
Rework the driver so that cfg_sg_seg_cnt becomes the overall maximum size and
allow the max size to be tunable. A separate (new) scsi sg count is then
setup with the scsi-modified reduced value. NVME then initializes based off
the overall maximum.
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/storvsc_drv.c')
0 files changed, 0 insertions, 0 deletions