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From: Alexander Motin <mav@FreeBSD.org>
Date: Sun, 24 Oct 2010 17:40:19 +0000 (UTC)
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Subject: svn commit: r214285 - stable/8/sys/cam
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Author: mav
Date: Sun Oct 24 17:40:19 2010
New Revision: 214285
URL: http://svn.freebsd.org/changeset/base/214285

Log:
  MFC r212991:
  Decrease poll interval from 1000 to 100us. This significantly reduces
  kernel dump time, especially with minidump.

Modified:
  stable/8/sys/cam/cam_xpt.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)
  stable/8/sys/dev/xen/xenpci/   (props changed)

Modified: stable/8/sys/cam/cam_xpt.c
==============================================================================
--- stable/8/sys/cam/cam_xpt.c	Sun Oct 24 17:28:25 2010	(r214284)
+++ stable/8/sys/cam/cam_xpt.c	Sun Oct 24 17:40:19 2010	(r214285)
@@ -2876,7 +2876,7 @@ xpt_polled_action(union ccb *start_ccb)
 	struct	  cam_ed *dev;
 
 
-	timeout = start_ccb->ccb_h.timeout;
+	timeout = start_ccb->ccb_h.timeout * 10;
 	sim = start_ccb->ccb_h.path->bus->sim;
 	devq = sim->devq;
 	dev = start_ccb->ccb_h.path->device;
@@ -2892,7 +2892,7 @@ xpt_polled_action(union ccb *start_ccb)
 
 	while(((devq != NULL && devq->send_openings <= 0) ||
 	   dev->ccbq.dev_openings < 0) && (--timeout > 0)) {
-		DELAY(1000);
+		DELAY(100);
 		(*(sim->sim_poll))(sim);
 		camisr_runqueue(&sim->sim_doneq);
 	}
@@ -2908,7 +2908,7 @@ xpt_polled_action(union ccb *start_ccb)
 			if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
 			    != CAM_REQ_INPROG)
 				break;
-			DELAY(1000);
+			DELAY(100);
 		}
 		if (timeout == 0) {
 			/*