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From: Alexander Motin <mav@FreeBSD.org>
Date: Tue, 17 Nov 2009 21:43:42 +0000 (UTC)
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Subject: svn commit: r199455 - stable/8/sys/geom
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Author: mav
Date: Tue Nov 17 21:43:42 2009
New Revision: 199455
URL: http://svn.freebsd.org/changeset/base/199455

Log:
  MFC r196904:
  Remove msleep() timeout from g_io_schedule_up/down(). It works fine
  without it, saving few percents of CPU on high request rates without
  need to rearm callout twice per request.

Modified:
  stable/8/sys/geom/geom_io.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/geom/geom_io.c
==============================================================================
--- stable/8/sys/geom/geom_io.c	Tue Nov 17 21:42:11 2009	(r199454)
+++ stable/8/sys/geom/geom_io.c	Tue Nov 17 21:43:42 2009	(r199455)
@@ -567,7 +567,7 @@ g_io_schedule_down(struct thread *tp __u
 		if (bp == NULL) {
 			CTR0(KTR_GEOM, "g_down going to sleep");
 			msleep(&g_wait_down, &g_bio_run_down.bio_queue_lock,
-			    PRIBIO | PDROP, "-", hz/10);
+			    PRIBIO | PDROP, "-", 0);
 			continue;
 		}
 		CTR0(KTR_GEOM, "g_down has work to do");
@@ -672,7 +672,7 @@ g_io_schedule_up(struct thread *tp __unu
 		}
 		CTR0(KTR_GEOM, "g_up going to sleep");
 		msleep(&g_wait_up, &g_bio_run_up.bio_queue_lock,
-		    PRIBIO | PDROP, "-", hz/10);
+		    PRIBIO | PDROP, "-", 0);
 	}
 }