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* [PATCH] NFSd: simplify locking in nfsd_recall_delegations()
@ 2012-05-22 10:28 Stanislav Kinsbursky
  2012-05-24 12:30 ` Benny Halevy
  0 siblings, 1 reply; 2+ messages in thread
From: Stanislav Kinsbursky @ 2012-05-22 10:28 UTC (permalink / raw)
  To: bfields; +Cc: linux-nfs, linux-kernel, devel

Holding of client_mutex looks redundant here - holding of recall_lock looks
enough.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
---
 fs/nfsd/nfs4state.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index f004e61..fdef9fc 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4744,11 +4744,9 @@ void nfsd_recall_delegations(u64 num)
 {
 	unsigned int count;
 
-	nfs4_lock_state();
 	spin_lock(&recall_lock);
 	count = nfsd_process_n_delegations(num, nfsd_break_one_deleg, NULL);
 	spin_unlock(&recall_lock);
-	nfs4_unlock_state();
 
 	printk(KERN_INFO "NFSD: Recalled %d delegations", count);
 }


^ permalink raw reply related	[flat|nested] 2+ messages in thread

* Re: [PATCH] NFSd: simplify locking in nfsd_recall_delegations()
  2012-05-22 10:28 [PATCH] NFSd: simplify locking in nfsd_recall_delegations() Stanislav Kinsbursky
@ 2012-05-24 12:30 ` Benny Halevy
  0 siblings, 0 replies; 2+ messages in thread
From: Benny Halevy @ 2012-05-24 12:30 UTC (permalink / raw)
  To: Stanislav Kinsbursky; +Cc: bfields, linux-nfs, linux-kernel, devel

On 2012-05-22 13:28, Stanislav Kinsbursky wrote:
> Holding of client_mutex looks redundant here - holding of recall_lock looks
> enough.

Looking at the code, agreed.

Benny

> 
> Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
> ---
>  fs/nfsd/nfs4state.c |    2 --
>  1 files changed, 0 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
> index f004e61..fdef9fc 100644
> --- a/fs/nfsd/nfs4state.c
> +++ b/fs/nfsd/nfs4state.c
> @@ -4744,11 +4744,9 @@ void nfsd_recall_delegations(u64 num)
>  {
>  	unsigned int count;
>  
> -	nfs4_lock_state();
>  	spin_lock(&recall_lock);
>  	count = nfsd_process_n_delegations(num, nfsd_break_one_deleg, NULL);
>  	spin_unlock(&recall_lock);
> -	nfs4_unlock_state();
>  
>  	printk(KERN_INFO "NFSD: Recalled %d delegations", count);
>  }
> 
> --
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^ permalink raw reply	[flat|nested] 2+ messages in thread

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2012-05-22 10:28 [PATCH] NFSd: simplify locking in nfsd_recall_delegations() Stanislav Kinsbursky
2012-05-24 12:30 ` Benny Halevy

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