My understanding is that there is a push to turn the kernel_thread
interface into a non-exported symbol and move all kernel threads to use
the kthread API. This patch changes lockd to use kthread_run to spawn
the reclaimer thread.
I've made the assumption here that the extra module references taken
when we spawn this thread are unnecessary and removed them. I've also
added a KERN_ERR printk that pops if the thread can't be spawned to warn
the admin that the locks won't be reclaimed.
I consider this patch 2.6.29 material.
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
fs/lockd/clntlock.c | 14 +++++++++-----
1 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c
index 8307dd6..fcc2378 100644
--- a/fs/lockd/clntlock.c
+++ b/fs/lockd/clntlock.c
@@ -14,6 +14,7 @@
#include <linux/sunrpc/svc.h>
#include <linux/lockd/lockd.h>
#include <linux/smp_lock.h>
+#include <linux/kthread.h>
#define NLMDBG_FACILITY NLMDBG_CLIENT
@@ -191,11 +192,15 @@ __be32 nlmclnt_grant(const struct sockaddr *addr, const struct nlm_lock *lock)
void
nlmclnt_recovery(struct nlm_host *host)
{
+ struct task_struct *task;
+
if (!host->h_reclaiming++) {
nlm_get_host(host);
- __module_get(THIS_MODULE);
- if (kernel_thread(reclaimer, host, CLONE_FS | CLONE_FILES) < 0)
- module_put(THIS_MODULE);
+ task = kthread_run(reclaimer, host, "%s-reclaim", host->h_name);
+ if (IS_ERR(task))
+ printk(KERN_ERR "lockd: unable to spawn reclaimer "
+ "thread. Locks for %s won't be reclaimed! "
+ "(%ld)\n", host->h_name, PTR_ERR(task));
}
}
@@ -207,7 +212,6 @@ reclaimer(void *ptr)
struct file_lock *fl, *next;
u32 nsmstate;
- daemonize("%s-reclaim", host->h_name);
allow_signal(SIGKILL);
down_write(&host->h_rwsem);
@@ -261,5 +265,5 @@ restart:
nlm_release_host(host);
lockd_down();
unlock_kernel();
- module_put_and_exit(0);
+ return 0;
}
--
1.5.5.1
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