diff options
| author | Kashyap.Desai@avagotech.com <Kashyap.Desai@avagotech.com> | 2014-08-20 15:54:33 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-09-16 01:01:58 +0200 |
| commit | 64bdcbc449105377dd60c8da97cfc1663b39562c (patch) | |
| tree | be79dd9fe4dfd101dc68ed5ee6d0d53ce2efad09 /drivers/scsi/aacraid | |
| parent | sd: Avoid sending medium write commands if device is write protected (diff) | |
| download | linux-64bdcbc449105377dd60c8da97cfc1663b39562c.tar.xz linux-64bdcbc449105377dd60c8da97cfc1663b39562c.zip | |
scsi: add use_cmd_list flag
Add a use_cmd_list flag in struct Scsi_Host to request keeping track of
all outstanding commands per device.
Default behaviour is not to keep track of cmd_list per sdev, as this may
introduce lock contention. (overhead is more on multi-node NUMA.), and
only enable it on the two drivers that need it.
Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/aacraid')
| -rw-r--r-- | drivers/scsi/aacraid/linit.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c index 63f576c9300a..a759cb2d4b15 100644 --- a/drivers/scsi/aacraid/linit.c +++ b/drivers/scsi/aacraid/linit.c @@ -1152,6 +1152,7 @@ static int aac_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) shost->irq = pdev->irq; shost->unique_id = unique_id; shost->max_cmd_len = 16; + shost->use_cmd_list = 1; aac = (struct aac_dev *)shost->hostdata; aac->base_start = pci_resource_start(pdev, 0); |