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[SCSI] scsi_dh_alua: Decrease retry interval

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The alua device handler starts the first retry after 10 seconds,
and increases it times 10 for each round.
This leads to an unnecessary delay. This patch modifies it to
start after one second, and increase by a factor of two.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Hannes Reinecke 2011-08-24 10:51:19 +02:00 committed by James Bottomley
parent cfde3fa166
commit ebd1f645bd
1 changed files with 2 additions and 2 deletions
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4
drivers/scsi/device_handler/scsi_dh_alua.c
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@ -506,7 +506,7 @@ static int alua_rtpg(struct scsi_device *sdev, struct alua_dh_data *h)
int len, k, off, valid_states = 0;
unsigned char *ucp;
unsigned err;
unsigned long expiry, interval = 10;
unsigned long expiry, interval = 1;
expiry = round_jiffies_up(jiffies + ALUA_FAILOVER_TIMEOUT);
retry:
@ -567,7 +567,7 @@ static int alua_rtpg(struct scsi_device *sdev, struct alua_dh_data *h)
case TPGS_STATE_TRANSITIONING:
if (time_before(jiffies, expiry)) {
/* State transition, retry */
interval *= 10;
interval *= 2;
msleep(interval);
goto retry;
}