Problem with INVARIANTS and WITNESS

[M. Warner Losh]

P.S.  You might try the following patch to get more info about who is
making the request.

Index: geom_io.c
===================================================================
--- geom_io.c	(revision 209268)
+++ geom_io.c	(working copy)
@@ -424,8 +424,8 @@
 	}
 	if (bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_DELETE)) {
 		KASSERT(bp->bio_offset % cp->provider->sectorsize == 0,
-		    ("wrong offset %jd for sectorsize %u",
-		    bp->bio_offset, cp->provider->sectorsize));
+		    ("wrong offset %jd for sectorsize %u (geom %s)",
+		    bp->bio_offset, cp->provider->sectorsize), cp->geom->name);
 		KASSERT(bp->bio_length % cp->provider->sectorsize == 0,
 		    ("wrong length %jd for sectorsize %u",
 		    bp->bio_length, cp->provider->sectorsize));

Warner