AcoSail/kernel_optimize_test
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[SCSI] hpsa: only do device rescan for certain events

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Do no rescan on every events -- way too many rescans are
triggered if we don't filter the events.  Limit rescans
to be triggered by the following set of events:

 * controller state change
 * enclosure hot plug
 * physical drive state change
 * logical drive state change
 * redundant controller state change
 * accelerated io enabled/disabled
 * accelerated io configuration change

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Stephen M. Cameron 2014-02-18 13:57:42 -06:00 committed by James Bottomley
parent 23100dd96a
commit faff6ee053
2 changed files with 17 additions and 1 deletions
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2
drivers/scsi/hpsa.c
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@ -6419,7 +6419,7 @@ static void hpsa_ctlr_needs_rescan(struct ctlr_info *h)
return;
h->events = readl(&(h->cfgtable->event_notify));
if (!h->events && !h->drv_req_rescan)
if (!(h->events & RESCAN_REQUIRED_EVENT_BITS) && !h->drv_req_rescan)
return;
/*

16
drivers/scsi/hpsa.h
View File

@ -181,6 +181,22 @@ struct ctlr_info {
#define HPSATMF_LOG_QRY_TSET (1 << 24)
#define HPSATMF_LOG_QRY_ASYNC (1 << 25)
u32 events;
#define CTLR_STATE_CHANGE_EVENT (1 << 0)
#define CTLR_ENCLOSURE_HOT_PLUG_EVENT (1 << 1)
#define CTLR_STATE_CHANGE_EVENT_PHYSICAL_DRV (1 << 4)
#define CTLR_STATE_CHANGE_EVENT_LOGICAL_DRV (1 << 5)
#define CTLR_STATE_CHANGE_EVENT_REDUNDANT_CNTRL (1 << 6)
#define CTLR_STATE_CHANGE_EVENT_AIO_ENABLED_DISABLED (1 << 30)
#define CTLR_STATE_CHANGE_EVENT_AIO_CONFIG_CHANGE (1 << 31)
#define RESCAN_REQUIRED_EVENT_BITS \
(CTLR_STATE_CHANGE_EVENT | \
CTLR_ENCLOSURE_HOT_PLUG_EVENT | \
CTLR_STATE_CHANGE_EVENT_PHYSICAL_DRV | \
CTLR_STATE_CHANGE_EVENT_LOGICAL_DRV | \
CTLR_STATE_CHANGE_EVENT_REDUNDANT_CNTRL | \
CTLR_STATE_CHANGE_EVENT_AIO_ENABLED_DISABLED | \
CTLR_STATE_CHANGE_EVENT_AIO_CONFIG_CHANGE)
int acciopath_status;
int drv_req_rescan; /* flag for driver to request rescan event */
};