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Date: Tue, 19 Oct 2010 17:50:17 +0200
From: Tejun Heo <tj@...nel.org>
To: David Howells <dhowells@...hat.com>, linux-afs@...ts.infradead.org,
lkml <linux-kernel@...r.kernel.org>
Subject: [PATCH v2.6.36-rc7] afs: add afs_wq and use it instead of the system
workqueue
flush_scheduled_work() is going away. afs needs to make sure all the
works it has queued have finished before being unloaded and there can
be arbitrary number of pending works. Add afs_wq and use it as the
flush domain instead of the system workqueue.
While at it, convert cancel_delayed_work() + flush_scheduled_work() to
cancel_delayed_work_sync() in afs_mntpt_kill_timer().
Signed-off-by: Tejun Heo <tj@...nel.org>
---
fs/afs/cmservice.c | 12 ++++++------
fs/afs/internal.h | 1 +
fs/afs/main.c | 13 +++++++++++--
fs/afs/mntpt.c | 11 +++++------
fs/afs/rxrpc.c | 2 +-
fs/afs/server.c | 13 +++++++------
fs/afs/vlocation.c | 14 +++++++-------
7 files changed, 38 insertions(+), 28 deletions(-)
Index: work/fs/afs/cmservice.c
===================================================================
--- work.orig/fs/afs/cmservice.c
+++ work/fs/afs/cmservice.c
@@ -289,7 +289,7 @@ static int afs_deliver_cb_callback(struc
call->server = server;
INIT_WORK(&call->work, SRXAFSCB_CallBack);
- schedule_work(&call->work);
+ queue_work(afs_wq, &call->work);
return 0;
}
@@ -336,7 +336,7 @@ static int afs_deliver_cb_init_call_back
call->server = server;
INIT_WORK(&call->work, SRXAFSCB_InitCallBackState);
- schedule_work(&call->work);
+ queue_work(afs_wq, &call->work);
return 0;
}
@@ -367,7 +367,7 @@ static int afs_deliver_cb_init_call_back
call->server = server;
INIT_WORK(&call->work, SRXAFSCB_InitCallBackState);
- schedule_work(&call->work);
+ queue_work(afs_wq, &call->work);
return 0;
}
@@ -400,7 +400,7 @@ static int afs_deliver_cb_probe(struct a
call->state = AFS_CALL_REPLYING;
INIT_WORK(&call->work, SRXAFSCB_Probe);
- schedule_work(&call->work);
+ queue_work(afs_wq, &call->work);
return 0;
}
@@ -496,7 +496,7 @@ static int afs_deliver_cb_probe_uuid(str
call->state = AFS_CALL_REPLYING;
INIT_WORK(&call->work, SRXAFSCB_ProbeUuid);
- schedule_work(&call->work);
+ queue_work(afs_wq, &call->work);
return 0;
}
@@ -580,6 +580,6 @@ static int afs_deliver_cb_tell_me_about_
call->state = AFS_CALL_REPLYING;
INIT_WORK(&call->work, SRXAFSCB_TellMeAboutYourself);
- schedule_work(&call->work);
+ queue_work(afs_wq, &call->work);
return 0;
}
Index: work/fs/afs/internal.h
===================================================================
--- work.orig/fs/afs/internal.h
+++ work/fs/afs/internal.h
@@ -576,6 +576,7 @@ extern int afs_drop_inode(struct inode *
/*
* main.c
*/
+extern struct workqueue_struct *afs_wq;
extern struct afs_uuid afs_uuid;
/*
Index: work/fs/afs/main.c
===================================================================
--- work.orig/fs/afs/main.c
+++ work/fs/afs/main.c
@@ -30,6 +30,7 @@ module_param(rootcell, charp, 0);
MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list");
struct afs_uuid afs_uuid;
+struct workqueue_struct *afs_wq;
/*
* get a client UUID
@@ -87,10 +88,16 @@ static int __init afs_init(void)
if (ret < 0)
return ret;
+ /* create workqueue */
+ ret = -ENOMEM;
+ afs_wq = alloc_workqueue("afs", 0, 0);
+ if (!afs_wq)
+ return ret;
+
/* register the /proc stuff */
ret = afs_proc_init();
if (ret < 0)
- return ret;
+ goto error_proc;
#ifdef CONFIG_AFS_FSCACHE
/* we want to be able to cache */
@@ -140,6 +147,8 @@ error_cell_init:
error_cache:
#endif
afs_proc_cleanup();
+error_proc:
+ destroy_workqueue(afs_wq);
rcu_barrier();
printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
return ret;
@@ -163,7 +172,7 @@ static void __exit afs_exit(void)
afs_purge_servers();
afs_callback_update_kill();
afs_vlocation_purge();
- flush_scheduled_work();
+ destroy_workqueue(afs_wq);
afs_cell_purge();
#ifdef CONFIG_AFS_FSCACHE
fscache_unregister_netfs(&afs_cache_netfs);
Index: work/fs/afs/mntpt.c
===================================================================
--- work.orig/fs/afs/mntpt.c
+++ work/fs/afs/mntpt.c
@@ -267,8 +267,8 @@ static void *afs_mntpt_follow_link(struc
path_put(&nd->path);
nd->path.mnt = newmnt;
nd->path.dentry = dget(newmnt->mnt_root);
- schedule_delayed_work(&afs_mntpt_expiry_timer,
- afs_mntpt_expiry_timeout * HZ);
+ queue_delayed_work(afs_wq, &afs_mntpt_expiry_timer,
+ afs_mntpt_expiry_timeout * HZ);
break;
case -EBUSY:
/* someone else made a mount here whilst we were busy */
@@ -294,8 +294,8 @@ static void afs_mntpt_expiry_timed_out(s
if (!list_empty(&afs_vfsmounts)) {
mark_mounts_for_expiry(&afs_vfsmounts);
- schedule_delayed_work(&afs_mntpt_expiry_timer,
- afs_mntpt_expiry_timeout * HZ);
+ queue_delayed_work(afs_wq, &afs_mntpt_expiry_timer,
+ afs_mntpt_expiry_timeout * HZ);
}
_leave("");
@@ -309,6 +309,5 @@ void afs_mntpt_kill_timer(void)
_enter("");
ASSERT(list_empty(&afs_vfsmounts));
- cancel_delayed_work(&afs_mntpt_expiry_timer);
- flush_scheduled_work();
+ cancel_delayed_work_sync(&afs_mntpt_expiry_timer);
}
Index: work/fs/afs/rxrpc.c
===================================================================
--- work.orig/fs/afs/rxrpc.c
+++ work/fs/afs/rxrpc.c
@@ -410,7 +410,7 @@ static void afs_rx_interceptor(struct so
if (!call) {
/* its an incoming call for our callback service */
skb_queue_tail(&afs_incoming_calls, skb);
- schedule_work(&afs_collect_incoming_call_work);
+ queue_work(afs_wq, &afs_collect_incoming_call_work);
} else {
/* route the messages directly to the appropriate call */
skb_queue_tail(&call->rx_queue, skb);
Index: work/fs/afs/server.c
===================================================================
--- work.orig/fs/afs/server.c
+++ work/fs/afs/server.c
@@ -238,8 +238,8 @@ void afs_put_server(struct afs_server *s
if (atomic_read(&server->usage) == 0) {
list_move_tail(&server->grave, &afs_server_graveyard);
server->time_of_death = get_seconds();
- schedule_delayed_work(&afs_server_reaper,
- afs_server_timeout * HZ);
+ queue_delayed_work(afs_wq, &afs_server_reaper,
+ afs_server_timeout * HZ);
}
spin_unlock(&afs_server_graveyard_lock);
_leave(" [dead]");
@@ -285,10 +285,11 @@ static void afs_reap_server(struct work_
expiry = server->time_of_death + afs_server_timeout;
if (expiry > now) {
delay = (expiry - now) * HZ;
- if (!schedule_delayed_work(&afs_server_reaper, delay)) {
+ if (!queue_delayed_work(afs_wq, &afs_server_reaper,
+ delay)) {
cancel_delayed_work(&afs_server_reaper);
- schedule_delayed_work(&afs_server_reaper,
- delay);
+ queue_delayed_work(afs_wq, &afs_server_reaper,
+ delay);
}
break;
}
@@ -323,5 +324,5 @@ void __exit afs_purge_servers(void)
{
afs_server_timeout = 0;
cancel_delayed_work(&afs_server_reaper);
- schedule_delayed_work(&afs_server_reaper, 0);
+ queue_delayed_work(afs_wq, &afs_server_reaper, 0);
}
Index: work/fs/afs/vlocation.c
===================================================================
--- work.orig/fs/afs/vlocation.c
+++ work/fs/afs/vlocation.c
@@ -507,8 +507,8 @@ void afs_put_vlocation(struct afs_vlocat
_debug("buried");
list_move_tail(&vl->grave, &afs_vlocation_graveyard);
vl->time_of_death = get_seconds();
- schedule_delayed_work(&afs_vlocation_reap,
- afs_vlocation_timeout * HZ);
+ queue_delayed_work(afs_wq, &afs_vlocation_reap,
+ afs_vlocation_timeout * HZ);
/* suspend updates on this record */
if (!list_empty(&vl->update)) {
@@ -561,11 +561,11 @@ static void afs_vlocation_reaper(struct
if (expiry > now) {
delay = (expiry - now) * HZ;
_debug("delay %lu", delay);
- if (!schedule_delayed_work(&afs_vlocation_reap,
- delay)) {
+ if (!queue_delayed_work(afs_wq, &afs_vlocation_reap,
+ delay)) {
cancel_delayed_work(&afs_vlocation_reap);
- schedule_delayed_work(&afs_vlocation_reap,
- delay);
+ queue_delayed_work(afs_wq, &afs_vlocation_reap,
+ delay);
}
break;
}
@@ -620,7 +620,7 @@ void afs_vlocation_purge(void)
destroy_workqueue(afs_vlocation_update_worker);
cancel_delayed_work(&afs_vlocation_reap);
- schedule_delayed_work(&afs_vlocation_reap, 0);
+ queue_delayed_work(afs_wq, &afs_vlocation_reap, 0);
}
/*
--
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