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cifs: remove dnotify thread code 

cifs: remove dnotify thread code

Al Viro recently removed the dir_notify code from the kernel along with
the CIFS code that used it. We can also get rid of the dnotify thread
as well.

In actuality, it never had anything to do with dir_notify anyway. All
it did was unnecessarily wake up all the tasks waiting on the response
queues every 15s. Previously that happened to prevent tasks from hanging
indefinitely when the server went unresponsive, but we put those to
sleep with proper timeouts now so there's no reason to keep this around.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Jeff Layton 2009-03-23 01:47:12 -04:00 committed by Steve French
parent 2d6d589d80
commit 5144ebf408
1 changed files with 0 additions and 47 deletions
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47
fs/cifs/cifsfs.c
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@ -66,9 +66,6 @@ unsigned int sign_CIFS_PDUs = 1;
extern struct task_struct *oplockThread; /* remove sparse warning */
struct task_struct *oplockThread = NULL;
/* extern struct task_struct * dnotifyThread; remove sparse warning */
#ifdef CONFIG_CIFS_EXPERIMENTAL
static struct task_struct *dnotifyThread = NULL;
#endif
static const struct super_operations cifs_super_ops;
unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
module_param(CIFSMaxBufSize, int, 0);
@ -1041,34 +1038,6 @@ static int cifs_oplock_thread(void *dummyarg)
return 0;
}
#ifdef CONFIG_CIFS_EXPERIMENTAL
static int cifs_dnotify_thread(void *dummyarg)
{
struct list_head *tmp;
struct TCP_Server_Info *server;
do {
if (try_to_freeze())
continue;
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(15*HZ);
/* check if any stuck requests that need
to be woken up and wakeq so the
thread can wake up and error out */
read_lock(&cifs_tcp_ses_lock);
list_for_each(tmp, &cifs_tcp_ses_list) {
server = list_entry(tmp, struct TCP_Server_Info,
tcp_ses_list);
if (atomic_read(&server->inFlight))
wake_up_all(&server->response_q);
}
read_unlock(&cifs_tcp_ses_lock);
} while (!kthread_should_stop());
return 0;
}
#endif
static int __init
init_cifs(void)
{
@ -1145,21 +1114,8 @@ init_cifs(void)
goto out_unregister_dfs_key_type;
}
#ifdef CONFIG_CIFS_EXPERIMENTAL
dnotifyThread = kthread_run(cifs_dnotify_thread, NULL, "cifsdnotifyd");
if (IS_ERR(dnotifyThread)) {
rc = PTR_ERR(dnotifyThread);
cERROR(1, ("error %d create dnotify thread", rc));
goto out_stop_oplock_thread;
}
#endif
return 0;
#ifdef CONFIG_CIFS_EXPERIMENTAL
out_stop_oplock_thread:
#endif
kthread_stop(oplockThread);
out_unregister_dfs_key_type:
#ifdef CONFIG_CIFS_DFS_UPCALL
unregister_key_type(&key_type_dns_resolver);
@ -1197,9 +1153,6 @@ exit_cifs(void)
cifs_destroy_inodecache();
cifs_destroy_mids();
cifs_destroy_request_bufs();
#ifdef CONFIG_CIFS_EXPERIMENTAL
kthread_stop(dnotifyThread);
#endif
kthread_stop(oplockThread);
}