diff options
| author | wenxiong@linux.vnet.ibm.com <wenxiong@linux.vnet.ibm.com> | 2013-01-12 00:43:51 +0100 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2013-01-30 00:48:52 +0100 |
| commit | 56d6aa33d3f68471466cb183d6e04b508dfb296f (patch) | |
| tree | 3c13bfb4312535390b613ef31044f1af9ff9a619 /drivers/scsi/ipr.h | |
| parent | [SCSI] ipr: Add support for MSI-X and distributed completion (diff) | |
| download | linux-56d6aa33d3f68471466cb183d6e04b508dfb296f.tar.xz linux-56d6aa33d3f68471466cb183d6e04b508dfb296f.zip | |
[SCSI] ipr: Reduce lock contention
This patch reduces lock contention while implementing distributed
completion processing.
Signed-off-by: Wen Xiong <wenxiong@linux.vnet.ibm.com>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/ipr.h')
| -rw-r--r-- | drivers/scsi/ipr.h | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/drivers/scsi/ipr.h b/drivers/scsi/ipr.h index 325cb2dd9a90..6fade571755c 100644 --- a/drivers/scsi/ipr.h +++ b/drivers/scsi/ipr.h @@ -482,17 +482,18 @@ struct ipr_hrr_queue { struct list_head hrrq_free_q; struct list_head hrrq_pending_q; + spinlock_t _lock; + spinlock_t *lock; volatile u32 toggle_bit; u32 size; u32 min_cmd_id; u32 max_cmd_id; + u8 allow_interrupts:1; + u8 ioa_is_dead:1; + u8 allow_cmds:1; }; -#define for_each_hrrq(hrrq, ioa_cfg) \ - for (hrrq = (ioa_cfg)->hrrq; \ - hrrq < ((ioa_cfg)->hrrq + (ioa_cfg)->hrrq_num); hrrq++) - /* Command packet structure */ struct ipr_cmd_pkt { u8 reserved; /* Reserved by IOA */ @@ -1057,6 +1058,10 @@ struct ipr_hostrcb64_fabric_desc { struct ipr_hostrcb64_config_element elem[1]; }__attribute__((packed, aligned (8))); +#define for_each_hrrq(hrrq, ioa_cfg) \ + for (hrrq = (ioa_cfg)->hrrq; \ + hrrq < ((ioa_cfg)->hrrq + (ioa_cfg)->hrrq_num); hrrq++) + #define for_each_fabric_cfg(fabric, cfg) \ for (cfg = (fabric)->elem; \ cfg < ((fabric)->elem + be16_to_cpu((fabric)->num_entries)); \ @@ -1411,13 +1416,10 @@ struct ipr_ioa_cfg { struct list_head queue; - u8 allow_interrupts:1; u8 in_reset_reload:1; u8 in_ioa_bringdown:1; u8 ioa_unit_checked:1; - u8 ioa_is_dead:1; u8 dump_taken:1; - u8 allow_cmds:1; u8 allow_ml_add_del:1; u8 needs_hard_reset:1; u8 dual_raid:1; @@ -1449,7 +1451,7 @@ struct ipr_ioa_cfg { char trace_start[8]; #define IPR_TRACE_START_LABEL "trace" struct ipr_trace_entry *trace; - u32 trace_index:IPR_NUM_TRACE_INDEX_BITS; + atomic_t trace_index; char cfg_table_start[8]; #define IPR_CFG_TBL_START "cfg" @@ -1476,7 +1478,8 @@ struct ipr_ioa_cfg { struct ipr_hrr_queue hrrq[IPR_MAX_HRRQ_NUM]; u32 hrrq_num; - u32 hrrq_index; + atomic_t hrrq_index; + u16 identify_hrrq_index; struct ipr_bus_attributes bus_attr[IPR_MAX_NUM_BUSES]; |