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From: Alexander Motin <mav@FreeBSD.org>
Date: Tue, 8 Sep 2009 05:46:38 +0000 (UTC)
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Subject: svn commit: r196964 - head/sys/geom
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Author: mav
Date: Tue Sep  8 05:46:38 2009
New Revision: 196964
URL: http://svn.freebsd.org/changeset/base/196964

Log:
  Do not check proper request alignment here in geom_dev in production.
  It will be checked any way later by g_io_check() in g_io_schedule_down().
  It is only needed here to not trigger panic from additional check, when
  INVARIANTS enabled. So cover it with #ifdef INVARIANTS. It saves two
  64bit divisions per request.

Modified:
  head/sys/geom/geom_dev.c

Modified: head/sys/geom/geom_dev.c
==============================================================================
--- head/sys/geom/geom_dev.c	Tue Sep  8 05:24:09 2009	(r196963)
+++ head/sys/geom/geom_dev.c	Tue Sep  8 05:46:38 2009	(r196964)
@@ -371,14 +371,14 @@ g_dev_strategy(struct bio *bp)
 	cp = dev->si_drv2;
 	KASSERT(cp->acr || cp->acw,
 	    ("Consumer with zero access count in g_dev_strategy"));
-
+#ifdef INVARIANTS
 	if ((bp->bio_offset % cp->provider->sectorsize) != 0 ||
 	    (bp->bio_bcount % cp->provider->sectorsize) != 0) {
 		bp->bio_resid = bp->bio_bcount;
 		biofinish(bp, NULL, EINVAL);
 		return;
 	}
-
+#endif
 	for (;;) {
 		/*
 		 * XXX: This is not an ideal solution, but I belive it to