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Subject: Re: [PATCH] SUNRPC: Avoid RPC delays when exiting suspend
From:   Jon Hunter <jonathanh@nvidia.com>
To:     Trond Myklebust <trondmy@gmail.com>
CC:     <linux-nfs@vger.kernel.org>,
        linux-tegra <linux-tegra@vger.kernel.org>
References: <329228f8-e194-a021-9226-69a9b6a403ce@nvidia.com>
 <20191105142133.28741-1-trond.myklebust@hammerspace.com>
 <3f536791-dbd1-cc9a-c88a-ddc26dd57c00@nvidia.com>
Message-ID: <2e0bdb35-a033-55e4-464e-97f3fbb2090c@nvidia.com>
Date:   Mon, 18 Nov 2019 10:21:46 +0000
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Hi Trond,

On 06/11/2019 11:15, Jon Hunter wrote:
> 
> On 05/11/2019 14:21, Trond Myklebust wrote:
>> Jon Hunter: "I have been tracking down another suspend/NFS related
>> issue where again I am seeing random delays exiting suspend. The delays
>> can be up to a couple minutes in the worst case and this is causing a
>> suspend test we have to fail."
>>
>> Change the use of a deferrable work to a standard delayed one.
>>
>> Reported-by: Jon Hunter <jonathanh@nvidia.com>
>> Fixes: 7e0a0e38fcfea ("SUNRPC: Replace the queue timer with a delayed work function")
>> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
>> ---
>>  net/sunrpc/sched.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
>> index 360afe153193..987c4b1f0b17 100644
>> --- a/net/sunrpc/sched.c
>> +++ b/net/sunrpc/sched.c
>> @@ -260,7 +260,7 @@ static void __rpc_init_priority_wait_queue(struct rpc_wait_queue *queue, const c
>>  	rpc_reset_waitqueue_priority(queue);
>>  	queue->qlen = 0;
>>  	queue->timer_list.expires = 0;
>> -	INIT_DEFERRABLE_WORK(&queue->timer_list.dwork, __rpc_queue_timer_fn);
>> +	INIT_DELAYED_WORK(&queue->timer_list.dwork, __rpc_queue_timer_fn);
>>  	INIT_LIST_HEAD(&queue->timer_list.list);
>>  	rpc_assign_waitqueue_name(queue, qname);
>>  }
> 
> Thanks!
> 
> Tested-by: Jon Hunter <jonathanh@nvidia.com>

I see this is now applied in -next, but I am seeing the failures on
mainline. Any chance we could still get this into v5.4?

Cheers
Jon

-- 
nvpublic