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authorKashyap.Desai@avagotech.com <Kashyap.Desai@avagotech.com>2014-08-20 19:24:33 +0530
committerChristoph Hellwig <hch@lst.de>2014-09-15 16:01:58 -0700
commit64bdcbc449105377dd60c8da97cfc1663b39562c (patch)
treebe79dd9fe4dfd101dc68ed5ee6d0d53ce2efad09 /drivers/scsi/aacraid
parent2eefd57b97609949ae40952da2dea338e7d9a125 (diff)
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.c1
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);