Date: Tue, 15 Jan 2013 01:20:00 GMT From: dfilter@FreeBSD.ORG (dfilter service) To: freebsd-geom@FreeBSD.org Subject: Re: kern/113957: commit references a PR Message-ID: <201301150120.r0F1K0Hj049552@freefall.freebsd.org>
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The following reply was made to PR kern/113957; it has been noted by GNATS. From: dfilter@FreeBSD.ORG (dfilter service) To: bug-followup@FreeBSD.org Cc: Subject: Re: kern/113957: commit references a PR Date: Tue, 15 Jan 2013 01:14:02 +0000 (UTC) Author: mav Date: Tue Jan 15 01:13:55 2013 New Revision: 245443 URL: http://svnweb.freebsd.org/changeset/base/245443 Log: Alike to r242314 for GRAID make GMIRROR more aggressive in marking volumes as clean on shutdown and move that action from shutdown_pre_sync stage to shutdown_post_sync to avoid extra flapping. ZFS tends to not close devices on shutdown, that doesn't allow GEOM RAID to shutdown gracefully. To handle that, mark volume as clean just when shutdown time comes and there are no active writes. PR: kern/113957 MFC after: 2 weeks Modified: head/sys/geom/mirror/g_mirror.c Modified: head/sys/geom/mirror/g_mirror.c ============================================================================== --- head/sys/geom/mirror/g_mirror.c Tue Jan 15 00:39:15 2013 (r245442) +++ head/sys/geom/mirror/g_mirror.c Tue Jan 15 01:13:55 2013 (r245443) @@ -81,7 +81,8 @@ SYSCTL_UINT(_kern_geom_mirror, OID_AUTO, G_MIRROR_DEBUG(4, "%s: Woken up %p.", __func__, (ident)); \ } while (0) -static eventhandler_tag g_mirror_pre_sync = NULL; +static eventhandler_tag g_mirror_post_sync = NULL; +static int g_mirror_shutdown = 0; static int g_mirror_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp); @@ -815,7 +816,7 @@ g_mirror_idle(struct g_mirror_softc *sc, return (0); if (acw > 0 || (acw == -1 && sc->sc_provider->acw > 0)) { timeout = g_mirror_idletime - (time_uptime - sc->sc_last_write); - if (timeout > 0) + if (!g_mirror_shutdown && timeout > 0) return (timeout); } sc->sc_idle = 1; @@ -2821,7 +2822,7 @@ g_mirror_access(struct g_provider *pp, i error = ENXIO; goto end; } - if (dcw == 0 && !sc->sc_idle) + if (dcw == 0) g_mirror_idle(sc, dcw); if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROYING) != 0) { if (acr > 0 || acw > 0 || ace > 0) { @@ -3232,7 +3233,7 @@ g_mirror_dumpconf(struct sbuf *sb, const } static void -g_mirror_shutdown_pre_sync(void *arg, int howto) +g_mirror_shutdown_post_sync(void *arg, int howto) { struct g_class *mp; struct g_geom *gp, *gp2; @@ -3242,6 +3243,7 @@ g_mirror_shutdown_pre_sync(void *arg, in mp = arg; DROP_GIANT(); g_topology_lock(); + g_mirror_shutdown = 1; LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) { if ((sc = gp->softc) == NULL) continue; @@ -3250,6 +3252,7 @@ g_mirror_shutdown_pre_sync(void *arg, in continue; g_topology_unlock(); sx_xlock(&sc->sc_lock); + g_mirror_idle(sc, -1); g_cancel_event(sc); error = g_mirror_destroy(sc, G_MIRROR_DESTROY_DELAYED); if (error != 0) @@ -3264,9 +3267,9 @@ static void g_mirror_init(struct g_class *mp) { - g_mirror_pre_sync = EVENTHANDLER_REGISTER(shutdown_pre_sync, - g_mirror_shutdown_pre_sync, mp, SHUTDOWN_PRI_FIRST); - if (g_mirror_pre_sync == NULL) + g_mirror_post_sync = EVENTHANDLER_REGISTER(shutdown_post_sync, + g_mirror_shutdown_post_sync, mp, SHUTDOWN_PRI_FIRST); + if (g_mirror_post_sync == NULL) G_MIRROR_DEBUG(0, "Warning! Cannot register shutdown event."); } @@ -3274,8 +3277,8 @@ static void g_mirror_fini(struct g_class *mp) { - if (g_mirror_pre_sync != NULL) - EVENTHANDLER_DEREGISTER(shutdown_pre_sync, g_mirror_pre_sync); + if (g_mirror_post_sync != NULL) + EVENTHANDLER_DEREGISTER(shutdown_post_sync, g_mirror_post_sync); } DECLARE_GEOM_CLASS(g_mirror_class, g_mirror); _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscribe@freebsd.org"
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