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From: "Andrey V. Elsukov" <ae@FreeBSD.org>
Date: Tue, 7 Jun 2011 11:11:11 +0000 (UTC)
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Subject: svn commit: r222819 - head/sbin/geom/class/part
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Author: ae
Date: Tue Jun  7 11:11:11 2011
New Revision: 222819
URL: http://svn.freebsd.org/changeset/base/222819

Log:
  Do not use LCM from stripesize and user specified alignment value.
  When user wants have specific alignment - do what user wants.
  Use stripesize as alignment value in case, when some of gpart's
  arguments are ommitted for automatic calculation.
  
  Suggested by:	mav

Modified:
  head/sbin/geom/class/part/geom_part.c

Modified: head/sbin/geom/class/part/geom_part.c
==============================================================================
--- head/sbin/geom/class/part/geom_part.c	Tue Jun  7 09:37:08 2011	(r222818)
+++ head/sbin/geom/class/part/geom_part.c	Tue Jun  7 11:11:11 2011	(r222819)
@@ -341,9 +341,10 @@ gpart_autofill_resize(struct gctl_req *r
 			errc(EXIT_FAILURE, error, "Invalid alignment param");
 		if (alignment == 0)
 			errx(EXIT_FAILURE, "Invalid alignment param");
+	} else {
 		lba = pp->lg_stripesize / pp->lg_sectorsize;
 		if (lba > 0)
-			alignment = g_lcm(lba, alignment);
+			alignment = lba;
 	}
 	error = gctl_delete_param(req, "alignment");
 	if (error)
@@ -491,13 +492,9 @@ gpart_autofill(struct gctl_req *req)
 	if (has_size && has_start && !has_alignment)
 		goto done;
 
-	/*
-	 * If stripesize is not zero, then recalculate alignment value.
-	 * Use LCM from stripesize and user specified alignment.
-	 */
 	len = pp->lg_stripesize / pp->lg_sectorsize;
-	if (len > 0 )
-		alignment = g_lcm(len, alignment);
+	if (len > 0 && !has_alignment)
+		alignment = len;
 
 	/* Adjust parameters to stripeoffset */
 	offset = pp->lg_stripeoffset / pp->lg_sectorsize;