The patch below is a workaround for the "bouncing geom" problem that occurs primarily with labels. Say da0p1 and da1p1 are labeled "mir0" and "mir1" respectively, so they exist both as /dev/da[01]p1 and as /dev/gpt/mir[01]. Create a mirror on top of gpt/mir[01], then stop the mirror. GEOM won't retaste gpt/root[01], but it will see and taste da[01]p1, and the mirror will immediately reappear. The patch adds a sysctl which can be used to temporarily disable tasting so you can stop the mirror and safely disconnect the disks.
DES -- Dag-Erling Smørgrav - [email protected] Index: sys/geom/geom_int.h =================================================================== --- sys/geom/geom_int.h (revision 255780) +++ sys/geom/geom_int.h (working copy) @@ -75,6 +75,7 @@ /* geom_kern.c / geom_kernsim.c */ void g_init(void); extern int g_shutdown; +extern int g_notaste; /* geom_ctl.c */ void g_ctl_init(void); Index: sys/geom/geom_kern.c =================================================================== --- sys/geom/geom_kern.c (revision 255780) +++ sys/geom/geom_kern.c (working copy) @@ -66,6 +66,7 @@ int g_debugflags; int g_collectstats = 1; int g_shutdown; +int g_notaste; /* * G_UP and G_DOWN are the two threads which push I/O through the @@ -208,6 +209,9 @@ SYSCTL_INT(_kern_geom, OID_AUTO, debugflags, CTLFLAG_RW, &g_debugflags, 0, "Set various trace levels for GEOM debugging"); +SYSCTL_INT(_kern_geom, OID_AUTO, notaste, CTLFLAG_RW, + &g_notaste, 0, "Prevent GEOM tasting"); + SYSCTL_INT(_kern_geom, OID_AUTO, collectstats, CTLFLAG_RW, &g_collectstats, 0, "Control statistics collection on GEOM providers and consumers"); Index: sys/geom/geom_subr.c =================================================================== --- sys/geom/geom_subr.c (revision 255780) +++ sys/geom/geom_subr.c (working copy) @@ -271,7 +271,7 @@ g_topology_assert(); if (flag == EV_CANCEL) /* XXX: can't happen ? */ return; - if (g_shutdown) + if (g_shutdown || g_notaste) return; hh = arg; @@ -540,6 +540,8 @@ cp->geom->attrchanged != NULL) cp->geom->attrchanged(cp, "GEOM::media"); } + if (g_notaste) + return; LIST_FOREACH(mp, &g_classes, class) { if (mp->taste == NULL) continue; _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-geom To unsubscribe, send any mail to "[email protected]"
