From: Hannes Reinecke Date: Wed, 24 Aug 2011 08:51:19 +0000 (+0200) Subject: [SCSI] scsi_dh_alua: Decrease retry interval X-Git-Tag: v3.2-rc1~125^2~108 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ebd1f645bd4a284022c7d449a63fe48a3fc5a86e;p=profile%2Fivi%2Fkernel-x86-ivi.git [SCSI] scsi_dh_alua: Decrease retry interval 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 Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c index 34c6611..9dce367 100644 --- a/drivers/scsi/device_handler/scsi_dh_alua.c +++ b/drivers/scsi/device_handler/scsi_dh_alua.c @@ -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; }