diff options
| -rw-r--r-- | sys/kern/vfs_sync.c | 31 | ||||
| -rw-r--r-- | sys/sys/mount.h | 3 |
2 files changed, 31 insertions, 3 deletions
diff --git a/sys/kern/vfs_sync.c b/sys/kern/vfs_sync.c index cb3de524a81..7f4c7a579ff 100644 --- a/sys/kern/vfs_sync.c +++ b/sys/kern/vfs_sync.c @@ -1,4 +1,4 @@ -/* $OpenBSD: vfs_sync.c,v 1.8 1999/12/05 06:29:30 art Exp $ */ +/* $OpenBSD: vfs_sync.c,v 1.9 1999/12/05 06:56:35 art Exp $ */ /* @@ -63,7 +63,9 @@ #define SYNCER_DEFAULT 30 /* default sync delay time */ int syncer_maxdelay = SYNCER_MAXDELAY; /* maximum delay time */ time_t syncdelay = SYNCER_DEFAULT; /* time to delay syncing vnodes */ -int rushjob; /* number of slots to run ASAP */ + +int rushjob = 0; /* number of slots to run ASAP */ +int stat_rush_requests = 0; /* number of rush requests */ static int syncer_delayno = 0; static long syncer_last; @@ -72,6 +74,8 @@ static struct synclist *syncer_workitem_pending; extern struct simplelock mountlist_slock; +struct proc *syncerproc; + /* * The workitem queue. * @@ -148,6 +152,8 @@ sched_sync(p) long starttime; int s; + syncerproc = curproc; + for (;;) { starttime = time.tv_sec; @@ -209,6 +215,27 @@ sched_sync(p) } } +/* + * Request the syncer daemon to speed up its work. + * We never push it to speed up more than half of its + * normal turn time, otherwise it could take over the cpu. + */ +int +speedup_syncer() +{ + int s; + + s = splhigh(); + if (syncerproc && syncerproc->p_wchan == &lbolt) + setrunnable(syncerproc); + splx(s); + if (rushjob < syncdelay / 2) { + rushjob += 1; + stat_rush_requests += 1; + return 1; + } + return 0; +} /* * Routine to create and manage a filesystem syncer vnode. diff --git a/sys/sys/mount.h b/sys/sys/mount.h index 4e323dc71f9..debda5397ae 100644 --- a/sys/sys/mount.h +++ b/sys/sys/mount.h @@ -1,4 +1,4 @@ -/* $OpenBSD: mount.h,v 1.31 1999/07/02 23:35:53 deraadt Exp $ */ +/* $OpenBSD: mount.h,v 1.32 1999/12/05 06:56:34 art Exp $ */ /* $NetBSD: mount.h,v 1.48 1996/02/18 11:55:47 fvdl Exp $ */ /* @@ -539,6 +539,7 @@ int vfs_export /* process mount export info */ struct netcred *vfs_export_lookup /* lookup host in fs export list */ __P((struct mount *, struct netexport *, struct mbuf *)); int vfs_allocate_syncvnode __P((struct mount *)); +int speedup_syncer __P((void)); int vfs_syncwait __P((int)); /* sync and wait for complete */ void vfs_shutdown __P((void)); /* unmount and sync file systems */ |