diff options
| author | Chad Dupuis <chad.dupuis@qlogic.com> | 2013-01-30 12:34:38 +0400 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2013-02-22 15:29:49 +0400 |
| commit | 3c290d0b5f8ff7b0fd2c964c5ec2c14191a9e790 (patch) | |
| tree | aeabbf158d1efef3689782c996685a2630de289c /drivers/scsi/qla2xxx/qla_inline.h | |
| parent | 8d93f5502221cc8eb420da65dc86a5ef07b038d0 (diff) | |
| download | linux-3c290d0b5f8ff7b0fd2c964c5ec2c14191a9e790.tar.xz | |
[SCSI] qla2xxx: Ramp down queue depth for attached SCSI devices when driver resources are low.
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_inline.h')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_inline.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/scsi/qla2xxx/qla_inline.h b/drivers/scsi/qla2xxx/qla_inline.h index c0462c04c885..deb8618d1b81 100644 --- a/drivers/scsi/qla2xxx/qla_inline.h +++ b/drivers/scsi/qla2xxx/qla_inline.h @@ -213,3 +213,22 @@ qla2x00_gid_list_size(struct qla_hw_data *ha) { return sizeof(struct gid_list_info) * ha->max_fibre_devices; } + +static inline void +qla2x00_do_host_ramp_up(scsi_qla_host_t *vha) +{ + if (vha->hw->cfg_lun_q_depth >= ql2xmaxqdepth) + return; + + /* Wait at least HOST_QUEUE_RAMPDOWN_INTERVAL before ramping up */ + if (time_before(jiffies, (vha->hw->host_last_rampdown_time + + HOST_QUEUE_RAMPDOWN_INTERVAL))) + return; + + /* Wait at least HOST_QUEUE_RAMPUP_INTERVAL between each ramp up */ + if (time_before(jiffies, (vha->hw->host_last_rampup_time + + HOST_QUEUE_RAMPUP_INTERVAL))) + return; + + set_bit(HOST_RAMP_UP_QUEUE_DEPTH, &vha->dpc_flags); +} |