linux-kernel - Re: [PATCH v2] NFSd: simplify locking in nfsd_recall

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Date:	Wed, 18 Jul 2012 19:27:27 -0400
From:	"J. Bruce Fields" <bfields@...ldses.org>
To:	Stanislav Kinsbursky <skinsbursky@...allels.com>
Cc:	linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org,
	devel@...nvz.org
Subject: Re: [PATCH v2] NFSd: simplify locking in nfsd_recall_delegations()

On Tue, Jul 03, 2012 at 05:02:24PM +0400, Stanislav Kinsbursky wrote:
> v2: rebased on 3.5-rc3 kernel
> 
> Holding of client_mutex looks redundant here - recall_lock looks enough.

Yep, thanks.--b.

> 
> Signed-off-by: Stanislav Kinsbursky <skinsbursky@...allels.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 33eccee..480ecc9 100644
> --- a/fs/nfsd/nfs4state.c
> +++ b/fs/nfsd/nfs4state.c
> @@ -4622,7 +4622,6 @@ void nfsd_recall_delegations(u64 num)
>  	LIST_HEAD(victims);
>  	struct nfs4_delegation *dp, *dnext;
>  
> -	nfs4_lock_state();
>  	spin_lock(&recall_lock);
>  	count = nfsd_process_n_delegations(num, &victims);
>  	list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) {
> @@ -4630,7 +4629,6 @@ void nfsd_recall_delegations(u64 num)
>  		nfsd_break_one_deleg(dp);
>  	}
>  	spin_unlock(&recall_lock);
> -	nfs4_unlock_state();
>  
>  	printk(KERN_INFO "NFSD: Recalled %d delegations", count);
>  }
> 
--
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