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authorNeilBrown <neilb@cse.unsw.edu.au>2005-06-23 22:03:19 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-24 00:06:31 -0700
commit58da282b733cff4caef805c6555c7a3b90772946 (patch)
tree3defc7d637584c133421b6a0314756cb78467bc9 /fs/nfsd
parentdfc8356570b6fcb4035c7d916ade5bbbe6c3b50a (diff)
downloadlinux-58da282b733cff4caef805c6555c7a3b90772946.tar.bz2
[PATCH] knfsd: nfsd4: create separate laundromat workqueue
We're running the laundromat work on the default kevent worker thread. But the laundromat takes the nfsv4 state semaphore, which is used for way too much stuff, and the potential for deadlocks is high. Better to have this on a separate workqueue. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/nfs4state.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 2a5f00b0ee99..9bec088e7657 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1844,6 +1844,7 @@ out:
return status;
}
+static struct workqueue_struct *laundry_wq;
static struct work_struct laundromat_work;
static void laundromat_main(void *);
static DECLARE_WORK(laundromat_work, laundromat_main, NULL);
@@ -1951,7 +1952,7 @@ laundromat_main(void *not_used)
t = nfs4_laundromat();
dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
- schedule_delayed_work(&laundromat_work, t*HZ);
+ queue_delayed_work(laundry_wq, &laundromat_work, t*HZ);
}
/* search ownerid_hashtbl[] and close_lru for stateid owner
@@ -3211,7 +3212,8 @@ __nfs4_state_init(void)
printk("NFSD: starting %ld-second grace period\n", grace_time);
grace_end = boot_time + grace_time;
INIT_WORK(&laundromat_work,laundromat_main, NULL);
- schedule_delayed_work(&laundromat_work, NFSD_LEASE_TIME*HZ);
+ laundry_wq = create_singlethread_workqueue("nfsd4");
+ queue_delayed_work(laundry_wq, &laundromat_work, NFSD_LEASE_TIME*HZ);
}
int
@@ -3287,7 +3289,8 @@ __nfs4_state_shutdown(void)
}
cancel_delayed_work(&laundromat_work);
- flush_scheduled_work();
+ flush_workqueue(laundry_wq);
+ destroy_workqueue(laundry_wq);
nfs4_init = 0;
}