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From: Kirk McKusick <mckusick@FreeBSD.org>
Date: Sun, 10 Jul 2011 05:34:49 +0000 (UTC)
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Subject: svn commit: r223902 - head/sys/ufs/ffs
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Author: mckusick
Date: Sun Jul 10 05:34:49 2011
New Revision: 223902
URL: http://svn.freebsd.org/changeset/base/223902

Log:
  When first creating snapshots, we may free some blocks within it.
  These blocks should not have TRIM applied to them.
  
  Submitted by: Kostik Belousov

Modified:
  head/sys/ufs/ffs/ffs_alloc.c

Modified: head/sys/ufs/ffs/ffs_alloc.c
==============================================================================
--- head/sys/ufs/ffs/ffs_alloc.c	Sun Jul 10 00:53:04 2011	(r223901)
+++ head/sys/ufs/ffs/ffs_alloc.c	Sun Jul 10 05:34:49 2011	(r223902)
@@ -2038,7 +2038,11 @@ ffs_blkfree(ump, fs, devvp, bno, size, i
 	    ffs_snapblkfree(fs, devvp, bno, size, inum, vtype, dephd)) {
 		return;
 	}
-	if (!ump->um_candelete) {
+	/*
+	 * Nothing to delay if TRIM is disabled, or the operation is
+	 * performed on the snapshot.
+	 */
+	if (!ump->um_candelete || devvp->v_type == VREG) {
 		ffs_blkfree_cg(ump, fs, devvp, bno, size, inum, dephd);
 		return;
 	}