[PATCH] net: fjes: fjes_main: Remove create_workqueue

[PATCH] net: fjes: fjes_main: Remove create_workqueue

[Bhaktipriya Shridhar]

alloc_workqueue replaces deprecated create_workqueue().

The workqueue adapter->txrx_wq has workitem
&adapter->raise_intr_rxdata_task per adapter. Extended Socket Network
Device is shared memory based, so someone's transmission denotes other's
reception.  raise_intr_rxdata_task raises interruption of receivers from
the sender in order to notify receivers.

The workqueue adapter->control_wq has workitem
&adapter->interrupt_watch_task per adapter. interrupt_watch_task is used
to prevent delay of interrupts.

Dedicated workqueues have been used in both cases since the workitems
on the workqueues are involved in normal device operation and require
forward progress under memory pressure.

max_active has been set to 0 since there is no need for throttling
the number of active work items.

Since network devices  may be used for memory reclaim,
WQ_MEM_RECLAIM has been set to guarantee forward progress.

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
---
 drivers/net/fjes/fjes_main.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c
index 86c331b..9006877 100644
--- a/drivers/net/fjes/fjes_main.c
+++ b/drivers/net/fjes/fjes_main.c
@@ -1187,8 +1187,9 @@ static int fjes_probe(struct platform_device *plat_dev)
 	adapter->force_reset = false;
 	adapter->open_guard = false;

-	adapter->txrx_wq = create_workqueue(DRV_NAME "/txrx");
-	adapter->control_wq = create_workqueue(DRV_NAME "/control");
+	adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0);
+	adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
+					      WQ_MEM_RECLAIM, 0);

 	INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
 	INIT_WORK(&adapter->raise_intr_rxdata_task,
--
2.1.4

Re: [PATCH] net: fjes: fjes_main: Remove create_workqueue

[Tejun Heo]

On Thu, Jun 02, 2016 at 03:00:57PM +0530, Bhaktipriya Shridhar wrote:
> alloc_workqueue replaces deprecated create_workqueue().
> 
> The workqueue adapter->txrx_wq has workitem
> &adapter->raise_intr_rxdata_task per adapter. Extended Socket Network
> Device is shared memory based, so someone's transmission denotes other's
> reception.  raise_intr_rxdata_task raises interruption of receivers from
> the sender in order to notify receivers.
> 
> The workqueue adapter->control_wq has workitem
> &adapter->interrupt_watch_task per adapter. interrupt_watch_task is used
> to prevent delay of interrupts.
> 
> Dedicated workqueues have been used in both cases since the workitems
> on the workqueues are involved in normal device operation and require
> forward progress under memory pressure.
> 
> max_active has been set to 0 since there is no need for throttling
> the number of active work items.
> 
> Since network devices  may be used for memory reclaim,
> WQ_MEM_RECLAIM has been set to guarantee forward progress.

Patch looks good but ditto with the description.  I wish it were
clearer.

Thanks.

-- 
tejun

RE: [PATCH] net: fjes: fjes_main: Remove create_workqueue

[Izumi, Taku]

Dear Bhaktipriya,

Thanks. Looks good to me.

Sincerely,
Taku Izumi

> -----Original Message-----
> From: Bhaktipriya Shridhar [mailto:bhaktipriya96@gmail.com]
> Sent: Thursday, June 02, 2016 6:31 PM
> To: David S. Miller; Izumi, Taku/泉 拓; Florian Westphal; Bhaktipriya Shridhar
> Cc: Tejun Heo; netdev@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: [PATCH] net: fjes: fjes_main: Remove create_workqueue
> 
> alloc_workqueue replaces deprecated create_workqueue().
> 
> The workqueue adapter->txrx_wq has workitem
> &adapter->raise_intr_rxdata_task per adapter. Extended Socket Network
> Device is shared memory based, so someone's transmission denotes other's
> reception.  raise_intr_rxdata_task raises interruption of receivers from
> the sender in order to notify receivers.
> 
> The workqueue adapter->control_wq has workitem
> &adapter->interrupt_watch_task per adapter. interrupt_watch_task is used
> to prevent delay of interrupts.
> 
> Dedicated workqueues have been used in both cases since the workitems
> on the workqueues are involved in normal device operation and require
> forward progress under memory pressure.
> 
> max_active has been set to 0 since there is no need for throttling
> the number of active work items.
> 
> Since network devices  may be used for memory reclaim,
> WQ_MEM_RECLAIM has been set to guarantee forward progress.
> 
> Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
> ---
>  drivers/net/fjes/fjes_main.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c
> index 86c331b..9006877 100644
> --- a/drivers/net/fjes/fjes_main.c
> +++ b/drivers/net/fjes/fjes_main.c
> @@ -1187,8 +1187,9 @@ static int fjes_probe(struct platform_device *plat_dev)
>  	adapter->force_reset = false;
>  	adapter->open_guard = false;
> 
> -	adapter->txrx_wq = create_workqueue(DRV_NAME "/txrx");
> -	adapter->control_wq = create_workqueue(DRV_NAME "/control");
> +	adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0);
> +	adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
> +					      WQ_MEM_RECLAIM, 0);
> 
>  	INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
>  	INIT_WORK(&adapter->raise_intr_rxdata_task,
> --
> 2.1.4
> 

Re: [PATCH] net: fjes: fjes_main: Remove create_workqueue

[Bhaktipriya Shridhar]

Thank you for your feedback.
Will send another patch with changed description.

Bhaktipriya.


On Fri, Jun 3, 2016 at 5:25 AM, Izumi, Taku <izumi.taku@jp.fujitsu.com> wrote:
> Dear Bhaktipriya,
>
> Thanks. Looks good to me.
>
> Sincerely,
> Taku Izumi
>
>> -----Original Message-----
>> From: Bhaktipriya Shridhar [mailto:bhaktipriya96@gmail.com]
>> Sent: Thursday, June 02, 2016 6:31 PM
>> To: David S. Miller; Izumi, Taku/泉 拓; Florian Westphal; Bhaktipriya Shridhar
>> Cc: Tejun Heo; netdev@vger.kernel.org; linux-kernel@vger.kernel.org
>> Subject: [PATCH] net: fjes: fjes_main: Remove create_workqueue
>>
>> alloc_workqueue replaces deprecated create_workqueue().
>>
>> The workqueue adapter->txrx_wq has workitem
>> &adapter->raise_intr_rxdata_task per adapter. Extended Socket Network
>> Device is shared memory based, so someone's transmission denotes other's
>> reception.  raise_intr_rxdata_task raises interruption of receivers from
>> the sender in order to notify receivers.
>>
>> The workqueue adapter->control_wq has workitem
>> &adapter->interrupt_watch_task per adapter. interrupt_watch_task is used
>> to prevent delay of interrupts.
>>
>> Dedicated workqueues have been used in both cases since the workitems
>> on the workqueues are involved in normal device operation and require
>> forward progress under memory pressure.
>>
>> max_active has been set to 0 since there is no need for throttling
>> the number of active work items.
>>
>> Since network devices  may be used for memory reclaim,
>> WQ_MEM_RECLAIM has been set to guarantee forward progress.
>>
>> Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
>> ---
>>  drivers/net/fjes/fjes_main.c | 5 +++--
>>  1 file changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c
>> index 86c331b..9006877 100644
>> --- a/drivers/net/fjes/fjes_main.c
>> +++ b/drivers/net/fjes/fjes_main.c
>> @@ -1187,8 +1187,9 @@ static int fjes_probe(struct platform_device *plat_dev)
>>       adapter->force_reset = false;
>>       adapter->open_guard = false;
>>
>> -     adapter->txrx_wq = create_workqueue(DRV_NAME "/txrx");
>> -     adapter->control_wq = create_workqueue(DRV_NAME "/control");
>> +     adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0);
>> +     adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
>> +                                           WQ_MEM_RECLAIM, 0);
>>
>>       INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
>>       INIT_WORK(&adapter->raise_intr_rxdata_task,
>> --
>> 2.1.4
>>
>

Re: [PATCH] net: fjes: fjes_main: Remove create_workqueue

[David Miller]

From: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Date: Sat, 4 Jun 2016 19:31:35 +0530

> Thank you for your feedback.
> Will send another patch with changed description.

I already applied your patch to the net-next tree, so that wouldn't
be appropriate.