linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
* [PATCH] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies.
@ 2017-04-29 19:46 Karim Eshapa
  2017-04-29 20:43 ` [PATCH] drivers:soc:fsl:qbman:qman.c: unsigned long jiffies value Karim Eshapa
  0 siblings, 1 reply; 12+ messages in thread
From: Karim Eshapa @ 2017-04-29 19:46 UTC (permalink / raw)
  To: oss
  Cc: claudiu.manoil, roy.pledge, colin.king, linuxppc-dev,
	linux-arm-kernel, linux-kernel, Karim Eshapa

Convert the jiffies into usecs then use it with usleep_range
such that instead of stuck doing nothing until action happens,
sleep with range improves responsiveness and power usage
and avoid hacking jiffies. it's used for approximate time.
You can check /kernel/time/timer.c.

Signed-off-by: Karim Eshapa <karim.eshapa@gmail.com>
---
 drivers/soc/fsl/qbman/qman.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/soc/fsl/qbman/qman.c b/drivers/soc/fsl/qbman/qman.c
index 6f509f6..e0df4d1 100644
--- a/drivers/soc/fsl/qbman/qman.c
+++ b/drivers/soc/fsl/qbman/qman.c
@@ -1084,11 +1084,9 @@ static int drain_mr_fqrni(struct qm_portal *p)
 		 * entries well before the ring has been fully consumed, so
 		 * we're being *really* paranoid here.
 		 */
-		u64 now, then = jiffies;
+		unsigned int udel_time = jiffies_to_usecs(10000);
 
-		do {
-			now = jiffies;
-		} while ((then + 10000) > now);
+		usleep_range(udel_time/2, udel_time);
 		msg = qm_mr_current(p);
 		if (!msg)
 			return 0;
-- 
2.7.4

^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH] drivers:soc:fsl:qbman:qman.c: unsigned long jiffies value.
  2017-04-29 19:46 [PATCH] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies Karim Eshapa
@ 2017-04-29 20:43 ` Karim Eshapa
  2017-04-29 23:32   ` Scott Wood
  0 siblings, 1 reply; 12+ messages in thread
From: Karim Eshapa @ 2017-04-29 20:43 UTC (permalink / raw)
  To: oss
  Cc: claudiu.manoil, roy.pledge, colin.king, linuxppc-dev,
	linux-arm-kernel, linux-kernel, Karim Eshapa

unsigned long jiffies value sorry for that.

Signed-off-by: Karim Eshapa <karim.eshapa@gmail.com>
---
 drivers/soc/fsl/qbman/qman.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/soc/fsl/qbman/qman.c b/drivers/soc/fsl/qbman/qman.c
index e0df4d1..6e1a44a 100644
--- a/drivers/soc/fsl/qbman/qman.c
+++ b/drivers/soc/fsl/qbman/qman.c
@@ -1084,7 +1084,7 @@ static int drain_mr_fqrni(struct qm_portal *p)
 		 * entries well before the ring has been fully consumed, so
 		 * we're being *really* paranoid here.
 		 */
-		unsigned int udel_time = jiffies_to_usecs(10000);
+		unsigned long udel_time = jiffies_to_usecs(10000);
 
 		usleep_range(udel_time/2, udel_time);
 		msg = qm_mr_current(p);
-- 
2.7.4

^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [PATCH] drivers:soc:fsl:qbman:qman.c: unsigned long jiffies value.
  2017-04-29 20:43 ` [PATCH] drivers:soc:fsl:qbman:qman.c: unsigned long jiffies value Karim Eshapa
@ 2017-04-29 23:32   ` Scott Wood
  2017-04-30  1:09     ` Karim Eshapa
  2017-05-04  4:58     ` [PATCH v2] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies Karim Eshapa
  0 siblings, 2 replies; 12+ messages in thread
From: Scott Wood @ 2017-04-29 23:32 UTC (permalink / raw)
  To: Karim Eshapa
  Cc: claudiu.manoil, roy.pledge, colin.king, linuxppc-dev,
	linux-arm-kernel, linux-kernel

On Sat, 2017-04-29 at 22:43 +0200, Karim Eshapa wrote:
> unsigned long jiffies value sorry for that.

You mean unsigned long msecs?

> 
> Signed-off-by: Karim Eshapa <karim.eshapa@gmail.com>
> ---
>  drivers/soc/fsl/qbman/qman.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/soc/fsl/qbman/qman.c b/drivers/soc/fsl/qbman/qman.c
> index e0df4d1..6e1a44a 100644
> --- a/drivers/soc/fsl/qbman/qman.c
> +++ b/drivers/soc/fsl/qbman/qman.c
> @@ -1084,7 +1084,7 @@ static int drain_mr_fqrni(struct qm_portal *p)
>  		 * entries well before the ring has been fully consumed, so
>  		 * we're being *really* paranoid here.
>  		 */
> -		unsigned int udel_time = jiffies_to_usecs(10000);
> +		unsigned long udel_time = jiffies_to_usecs(10000);
>  
>  		usleep_range(udel_time/2, udel_time);
>  		msg = qm_mr_current(p);

If unsigned int isn't big enough, then unsigned long won't be either on 32-
bit.  With such a long delay why not use msleep()?

As for the previous patch[1], you're halving the minimum timeout which may not
be correct.

For the NXP people: Is there *really* no better way to handle this than
waiting for so long?  Nothing that can be checked to exit the loop early (at
least, you could exit early if there is more work to do so only the final
iteration takes the full timeout)?  And why is the desired timeout specified
in jiffies, the duration of which can change based on kernel config and
doesn't reflect anything about the hardware?

-Scott

[1] When fixing a patch you've already posted that hasn't yet been applied,
send a replacement (v2) patch rather than a separate fix.

^ permalink raw reply	[flat|nested] 12+ messages in thread

* RE:drivers:soc:fsl:qbman:qman.c: unsigned long jiffies value
  2017-04-29 23:32   ` Scott Wood
@ 2017-04-30  1:09     ` Karim Eshapa
  2017-05-04  4:58     ` [PATCH v2] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies Karim Eshapa
  1 sibling, 0 replies; 12+ messages in thread
From: Karim Eshapa @ 2017-04-30  1:09 UTC (permalink / raw)
  To: oss
  Cc: claudiu.manoil, roy.pledge, colin.king, linuxppc-dev,
	linux-arm-kernel, linux-kernel, Karim Eshapa

On Sat, 29 Apr 2017 18:32:55 -0500, Scott Wood wrote:
>On Sat, 2017-04-29 at 22:43 +0200, Karim Eshapa wrote:
>
>> unsigned long jiffies value sorry for that.
>>
> You mean unsigned long msecs?
>

Yes, I mean usecs. 

>>
>> Signed-off-by: Karim Eshapa <karim.eshapa@gmail.com>
>> ---
>>  drivers/soc/fsl/qbman/qman.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/soc/fsl/qbman/qman.c b/drivers/soc/fsl/qbman/qman.c
>> index e0df4d1..6e1a44a 100644
>> --- a/drivers/soc/fsl/qbman/qman.c
>> +++ b/drivers/soc/fsl/qbman/qman.c
>> @@ -1084,7 +1084,7 @@ static int drain_mr_fqrni(struct qm_portal *p)
>>                * entries well before the ring has been fully consumed, so
>>                * we're being *really* paranoid here.
>>                */
>> -             unsigned int udel_time = jiffies_to_usecs(10000);
>> +             unsigned long udel_time = jiffies_to_usecs(10000);
>>  
>>               usleep_range(udel_time/2, udel_time);
>>               msg = qm_mr_current(p);

>If unsigned int isn't big enough, then unsigned long won't be either on 32-
>bit.  With such a long delay why not use msleep()?
>

I agree with you in long int.
After looking at Documentation/timers/timers-howto.txt I think
the msleep() is better as we actually have long delay.
may be we can use jiffies_to_msecs() with msleep() in case of we still have 
this large jiffies difference.

>As for the previous patch[1], you're halving the minimum timeout which may not
>be correct.
>
>

For the minimum timeout, I've read the following comments.

		 /*
                  * if MR was full and h/w had other FQRNI entries to produce, we
                  * need to allow it time to produce those entries once the
                  * existing entries are consumed. A worst-case situation
                  * (fully-loaded system) means h/w sequencers may have to do 3-4
                  * other things before servicing the portal's MR pump, each of
                  * which (if slow) may take ~50 qman cycles (which is ~200
                  * processor cycles). So rounding up and then multiplying this
                  * worst-case estimate by a factor of 10, just to be
                  * ultra-paranoid, goes as high as 10,000 cycles. NB, we consume
                  * one entry at a time, so h/w has an opportunity to produce new
                  * entries well before the ring has been fully consumed, so
                  * we're being *really* paranoid here.
		  */
		  u64 now, then = jiffies;
		
		do {
	                now = jiffies;
                 } while ((then + 10000) > now);  

He needs to guarantee certain action so, he made a very large factor of saftey
therefore I've used sleep in range with approximate delay. But we still need 
the driver owner to define appropriate value to put.

>[1] When fixing a patch you've already posted that hasn't yet been applied,
>send a replacement (v2) patch rather than a separate fix.
>

Thanks so much, I'm just newbies :)


Karim   

^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH v2] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies.
  2017-04-29 23:32   ` Scott Wood
  2017-04-30  1:09     ` Karim Eshapa
@ 2017-05-04  4:58     ` Karim Eshapa
  2017-05-04 21:07       ` Scott Wood
                         ` (2 more replies)
  1 sibling, 3 replies; 12+ messages in thread
From: Karim Eshapa @ 2017-05-04  4:58 UTC (permalink / raw)
  To: oss
  Cc: claudiu.manoil, roy.pledge, colin.king, linuxppc-dev,
	linux-arm-kernel, linux-kernel, Karim Eshapa

Avoid stuck and hacking jiffies for a long time and using msleep()
for certatin numeber of cylces without the factor of safety
but using the the long delay considering the factor of safety
with the while loop such that after msleep for a short period
of time we check the  msg if it's OK, breaking the big loop delay.

Signed-off-by: Karim Eshapa <karim.eshapa@gmail.com>
---
 drivers/soc/fsl/qbman/qman.c | 47 ++++++++++++++++++++++----------------------
 1 file changed, 24 insertions(+), 23 deletions(-)

diff --git a/drivers/soc/fsl/qbman/qman.c b/drivers/soc/fsl/qbman/qman.c
index 6f509f6..4f99298 100644
--- a/drivers/soc/fsl/qbman/qman.c
+++ b/drivers/soc/fsl/qbman/qman.c
@@ -1067,32 +1067,33 @@ static irqreturn_t portal_isr(int irq, void *ptr)
 static int drain_mr_fqrni(struct qm_portal *p)
 {
 	const union qm_mr_entry *msg;
+	unsigned long stop;
+	unsigned int timeout = jiffies_to_msecs(1000);
 loop:
 	msg = qm_mr_current(p);
-	if (!msg) {
-		/*
-		 * if MR was full and h/w had other FQRNI entries to produce, we
-		 * need to allow it time to produce those entries once the
-		 * existing entries are consumed. A worst-case situation
-		 * (fully-loaded system) means h/w sequencers may have to do 3-4
-		 * other things before servicing the portal's MR pump, each of
-		 * which (if slow) may take ~50 qman cycles (which is ~200
-		 * processor cycles). So rounding up and then multiplying this
-		 * worst-case estimate by a factor of 10, just to be
-		 * ultra-paranoid, goes as high as 10,000 cycles. NB, we consume
-		 * one entry at a time, so h/w has an opportunity to produce new
-		 * entries well before the ring has been fully consumed, so
-		 * we're being *really* paranoid here.
-		 */
-		u64 now, then = jiffies;
-
-		do {
-			now = jiffies;
-		} while ((then + 10000) > now);
+	stop = jiffies + 10000;
+	/*
+	 * if MR was full and h/w had other FQRNI entries to produce, we
+	 * need to allow it time to produce those entries once the
+	 * existing entries are consumed. A worst-case situation
+	 * (fully-loaded system) means h/w sequencers may have to do 3-4
+	 * other things before servicing the portal's MR pump, each of
+	 * which (if slow) may take ~50 qman cycles (which is ~200
+	 * processor cycles). So rounding up and then multiplying this
+	 * worst-case estimate by a factor of 10, just to be
+	 * ultra-paranoid, goes as high as 10,000 cycles. NB, we consume
+	 * one entry at a time, so h/w has an opportunity to produce new
+	 * entries well before the ring has been fully consumed, so
+	 * we're being *really* paranoid here.
+	 */
+	do {
+		if (msg)
+			break;
+		msleep(timeout);
 		msg = qm_mr_current(p);
-		if (!msg)
-			return 0;
-	}
+	} while (time_before(jiffies, stop));
+	if (!msg)
+		return 0;
 	if ((msg->verb & QM_MR_VERB_TYPE_MASK) != QM_MR_VERB_FQRNI) {
 		/* We aren't draining anything but FQRNIs */
 		pr_err("Found verb 0x%x in MR\n", msg->verb);
-- 
2.7.4

^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [PATCH v2] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies.
  2017-05-04  4:58     ` [PATCH v2] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies Karim Eshapa
@ 2017-05-04 21:07       ` Scott Wood
  2017-05-04 23:30         ` Roy Pledge
  2017-05-05  5:45       ` [PATCH v3] " Karim Eshapa
  2017-05-05  6:01       ` [PATCH v2] " Karim Eshapa
  2 siblings, 1 reply; 12+ messages in thread
From: Scott Wood @ 2017-05-04 21:07 UTC (permalink / raw)
  To: Karim Eshapa
  Cc: claudiu.manoil, roy.pledge, colin.king, linuxppc-dev,
	linux-arm-kernel, linux-kernel

On Thu, 2017-05-04 at 06:58 +0200, Karim Eshapa wrote:
> +	stop = jiffies + 10000;
> +	/*
> +	 * if MR was full and h/w had other FQRNI entries to produce, we
> +	 * need to allow it time to produce those entries once the
> +	 * existing entries are consumed. A worst-case situation
> +	 * (fully-loaded system) means h/w sequencers may have to do 3-4
> +	 * other things before servicing the portal's MR pump, each of
> +	 * which (if slow) may take ~50 qman cycles (which is ~200
> +	 * processor cycles). So rounding up and then multiplying this
> +	 * worst-case estimate by a factor of 10, just to be
> +	 * ultra-paranoid, goes as high as 10,000 cycles. NB, we consume
> +	 * one entry at a time, so h/w has an opportunity to produce new
> +	 * entries well before the ring has been fully consumed, so
> +	 * we're being *really* paranoid here.
> +	 */

OK, upon reading this more closely it seems the intent was to delay for 10,000
*processor cycles* and somehow that got turned into 10,000 jiffies (which is
40 seconds at the default Hz!).  We could just replace this whole thing with
msleep(1) and still be far more paranoid than was originally intended.

Claudiu and Roy, any comments?

-Scott

^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [PATCH v2] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies.
  2017-05-04 21:07       ` Scott Wood
@ 2017-05-04 23:30         ` Roy Pledge
  0 siblings, 0 replies; 12+ messages in thread
From: Roy Pledge @ 2017-05-04 23:30 UTC (permalink / raw)
  To: Scott Wood, Karim Eshapa
  Cc: Claudiu Manoil, colin.king, linuxppc-dev, linux-arm-kernel, linux-kernel

On 5/4/2017 5:07 PM, Scott Wood wrote:
> On Thu, 2017-05-04 at 06:58 +0200, Karim Eshapa wrote:
>> +	stop = jiffies + 10000;
>> +	/*
>> +	 * if MR was full and h/w had other FQRNI entries to produce, we
>> +	 * need to allow it time to produce those entries once the
>> +	 * existing entries are consumed. A worst-case situation
>> +	 * (fully-loaded system) means h/w sequencers may have to do 3-4
>> +	 * other things before servicing the portal's MR pump, each of
>> +	 * which (if slow) may take ~50 qman cycles (which is ~200
>> +	 * processor cycles). So rounding up and then multiplying this
>> +	 * worst-case estimate by a factor of 10, just to be
>> +	 * ultra-paranoid, goes as high as 10,000 cycles. NB, we consume
>> +	 * one entry at a time, so h/w has an opportunity to produce new
>> +	 * entries well before the ring has been fully consumed, so
>> +	 * we're being *really* paranoid here.
>> +	 */
> OK, upon reading this more closely it seems the intent was to delay for 10,000
> *processor cycles* and somehow that got turned into 10,000 jiffies (which is
> 40 seconds at the default Hz!).  We could just replace this whole thing with
> msleep(1) and still be far more paranoid than was originally intended.
>
> Claudiu and Roy, any comments?
Yes the timing here is certainly off, the code changed a few times since
the comment was originally written.
An msleep(1) seems reasonable here to me.

Roy
>
> -Scott
>
>

^ permalink raw reply	[flat|nested] 12+ messages in thread

* RE: [PATCH v3] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies.
  2017-05-04  4:58     ` [PATCH v2] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies Karim Eshapa
  2017-05-04 21:07       ` Scott Wood
@ 2017-05-05  5:45       ` Karim Eshapa
  2017-06-25  2:46         ` [v3] " Scott Wood
  2017-05-05  6:01       ` [PATCH v2] " Karim Eshapa
  2 siblings, 1 reply; 12+ messages in thread
From: Karim Eshapa @ 2017-05-05  5:45 UTC (permalink / raw)
  To: oss
  Cc: claudiu.manoil, roy.pledge, colin.king, linuxppc-dev,
	linux-arm-kernel, linux-kernel, Karim Eshapa

Use msleep() instead of stucking with
long delay will be more efficient.

Signed-off-by: Karim Eshapa <karim.eshapa@gmail.com>
---
 drivers/soc/fsl/qbman/qman.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/soc/fsl/qbman/qman.c b/drivers/soc/fsl/qbman/qman.c
index 3d891db..18d391e 100644
--- a/drivers/soc/fsl/qbman/qman.c
+++ b/drivers/soc/fsl/qbman/qman.c
@@ -1084,11 +1084,7 @@ static int drain_mr_fqrni(struct qm_portal *p)
 		 * entries well before the ring has been fully consumed, so
 		 * we're being *really* paranoid here.
 		 */
-		u64 now, then = jiffies;
-
-		do {
-			now = jiffies;
-		} while ((then + 10000) > now);
+		msleep(1);
 		msg = qm_mr_current(p);
 		if (!msg)
 			return 0;
-- 
2.7.4

^ permalink raw reply	[flat|nested] 12+ messages in thread

* RE: [PATCH v2] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies.
  2017-05-04  4:58     ` [PATCH v2] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies Karim Eshapa
  2017-05-04 21:07       ` Scott Wood
  2017-05-05  5:45       ` [PATCH v3] " Karim Eshapa
@ 2017-05-05  6:01       ` Karim Eshapa
  2017-05-05  6:33         ` Scott Wood
  2 siblings, 1 reply; 12+ messages in thread
From: Karim Eshapa @ 2017-05-05  6:01 UTC (permalink / raw)
  To: oss
  Cc: claudiu.manoil, roy.pledge, colin.king, linuxppc-dev,
	linux-arm-kernel, linux-kernel, Karim Eshapa

>On 5/4/2017 5:07 PM, Scott Wood wrote:
>> On Thu, 2017-05-04 at 06:58 +0200, Karim Eshapa wrote:
>>> +    stop = jiffies + 10000;
>>> +    /*
>>> +     * if MR was full and h/w had other FQRNI entries to produce, we
>>> +     * need to allow it time to produce those entries once the
>>> +     * existing entries are consumed. A worst-case situation
>>> +     * (fully-loaded system) means h/w sequencers may have to do 3-4
>>> +     * other things before servicing the portal's MR pump, each of
>>> +     * which (if slow) may take ~50 qman cycles (which is ~200
>>> +     * processor cycles). So rounding up and then multiplying this
>>> +     * worst-case estimate by a factor of 10, just to be
>>> +     * ultra-paranoid, goes as high as 10,000 cycles. NB, we consume
>>> +     * one entry at a time, so h/w has an opportunity to produce new
>>> +     * entries well before the ring has been fully consumed, so
>>> +     * we're being *really* paranoid here.
>>> +     */
>> OK, upon reading this more closely it seems the intent was to delay for 10,000
>> *processor cycles* and somehow that got turned into 10,000 jiffies (which is
>> 40 seconds at the default Hz!).  We could just replace this whole thing with
>> msleep(1) and still be far more paranoid than was originally intended.
>>
>> Claudiu and Roy, any comments?
>Yes the timing here is certainly off, the code changed a few times since
>the comment was originally written.
>An msleep(1) seems reasonable here to me.

If the previous patch with msleep(1) is OK.
can I send a patch to slightly change the comments.

Thanks,
Karim

^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [PATCH v2] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies.
  2017-05-05  6:01       ` [PATCH v2] " Karim Eshapa
@ 2017-05-05  6:33         ` Scott Wood
  0 siblings, 0 replies; 12+ messages in thread
From: Scott Wood @ 2017-05-05  6:33 UTC (permalink / raw)
  To: Karim Eshapa
  Cc: claudiu.manoil, roy.pledge, colin.king, linuxppc-dev,
	linux-arm-kernel, linux-kernel

On Fri, 2017-05-05 at 08:01 +0200, Karim Eshapa wrote:
> > On 5/4/2017 5:07 PM, Scott Wood wrote:
> > > On Thu, 2017-05-04 at 06:58 +0200, Karim Eshapa wrote:
> > > > +    stop = jiffies + 10000;
> > > > +    /*
> > > > +     * if MR was full and h/w had other FQRNI entries to produce, we
> > > > +     * need to allow it time to produce those entries once the
> > > > +     * existing entries are consumed. A worst-case situation
> > > > +     * (fully-loaded system) means h/w sequencers may have to do 3-4
> > > > +     * other things before servicing the portal's MR pump, each of
> > > > +     * which (if slow) may take ~50 qman cycles (which is ~200
> > > > +     * processor cycles). So rounding up and then multiplying this
> > > > +     * worst-case estimate by a factor of 10, just to be
> > > > +     * ultra-paranoid, goes as high as 10,000 cycles. NB, we consume
> > > > +     * one entry at a time, so h/w has an opportunity to produce new
> > > > +     * entries well before the ring has been fully consumed, so
> > > > +     * we're being *really* paranoid here.
> > > > +     */
> > > 
> > > OK, upon reading this more closely it seems the intent was to delay for
> > > 10,000
> > > *processor cycles* and somehow that got turned into 10,000 jiffies
> > > (which is
> > > 40 seconds at the default Hz!).  We could just replace this whole thing
> > > with
> > > msleep(1) and still be far more paranoid than was originally intended.
> > > 
> > > Claudiu and Roy, any comments?
> > 
> > Yes the timing here is certainly off, the code changed a few times since
> > the comment was originally written.
> > An msleep(1) seems reasonable here to me.
> 
> If the previous patch with msleep(1) is OK.
> can I send a patch to slightly change the comments.

Yes.

-Scott

^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [v3] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies.
  2017-05-05  5:45       ` [PATCH v3] " Karim Eshapa
@ 2017-06-25  2:46         ` Scott Wood
  2017-06-27 16:38           ` Leo Li
  0 siblings, 1 reply; 12+ messages in thread
From: Scott Wood @ 2017-06-25  2:46 UTC (permalink / raw)
  To: Karim Eshapa
  Cc: roy.pledge, linux-kernel, claudiu.manoil, colin.king,
	linuxppc-dev, linux-arm-kernel, Li Yang

On Fri, May 05, 2017 at 07:45:18AM +0200, Karim Eshapa wrote:
> Use msleep() instead of stucking with
> long delay will be more efficient.
> 
> Signed-off-by: Karim Eshapa <karim.eshapa@gmail.com>
> ---
>  drivers/soc/fsl/qbman/qman.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)

Acked-by: Scott Wood <oss@buserror.net>

(though the subject line should be "soc/qman: ...")

Leo, are you going to send this patch (and other qman patches) via
arm-soc?

-Scott

^ permalink raw reply	[flat|nested] 12+ messages in thread

* RE: [v3] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies.
  2017-06-25  2:46         ` [v3] " Scott Wood
@ 2017-06-27 16:38           ` Leo Li
  0 siblings, 0 replies; 12+ messages in thread
From: Leo Li @ 2017-06-27 16:38 UTC (permalink / raw)
  To: Scott Wood, Karim Eshapa
  Cc: Roy Pledge, linux-kernel, Claudiu Manoil, colin.king,
	linuxppc-dev, linux-arm-kernel



> -----Original Message-----
> From: Scott Wood [mailto:oss@buserror.net]
> Sent: Saturday, June 24, 2017 9:47 PM
> To: Karim Eshapa <karim.eshapa@gmail.com>
> Cc: Roy Pledge <roy.pledge@nxp.com>; linux-kernel@vger.kernel.org;
> Claudiu Manoil <claudiu.manoil@nxp.com>; colin.king@canonical.com;
> linuxppc-dev@lists.ozlabs.org; linux-arm-kernel@lists.infradead.org; Leo Li
> <leoyang.li@nxp.com>
> Subject: Re: [v3] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck
> hacking jiffies.
> 
> On Fri, May 05, 2017 at 07:45:18AM +0200, Karim Eshapa wrote:
> > Use msleep() instead of stucking with
> > long delay will be more efficient.
> >
> > Signed-off-by: Karim Eshapa <karim.eshapa@gmail.com>
> > ---
> >  drivers/soc/fsl/qbman/qman.c | 6 +-----
> >  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> Acked-by: Scott Wood <oss@buserror.net>
> 
> (though the subject line should be "soc/qman: ...")
> 
> Leo, are you going to send this patch (and other qman patches) via arm-soc?

Yes.  I can take it through the pull request for soc/fsl via arm-soc.  As mentioned in the feedback from David in another email, probably we should update the comment and commit message to mention how 10000 cycles becomes 1ms.

Regards,
Leo

^ permalink raw reply	[flat|nested] 12+ messages in thread

end of thread, other threads:[~2017-06-27 16:38 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-04-29 19:46 [PATCH] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies Karim Eshapa
2017-04-29 20:43 ` [PATCH] drivers:soc:fsl:qbman:qman.c: unsigned long jiffies value Karim Eshapa
2017-04-29 23:32   ` Scott Wood
2017-04-30  1:09     ` Karim Eshapa
2017-05-04  4:58     ` [PATCH v2] drivers:soc:fsl:qbman:qman.c: Sleep instead of stuck hacking jiffies Karim Eshapa
2017-05-04 21:07       ` Scott Wood
2017-05-04 23:30         ` Roy Pledge
2017-05-05  5:45       ` [PATCH v3] " Karim Eshapa
2017-06-25  2:46         ` [v3] " Scott Wood
2017-06-27 16:38           ` Leo Li
2017-05-05  6:01       ` [PATCH v2] " Karim Eshapa
2017-05-05  6:33         ` Scott Wood

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).