On 07/02/2013 05:51 PM, Srivatsa S. Bhat wrote:
[snip]
>
> Well, as I said, its timing dependent. We might miss the newly onlined CPU in
> the for_each_online_cpu() loop itself, based on when exactly the CPU was added
> to the cpu_online_mask. So you can't exactly pin-point the places where you'll
On 07/02/2013 02:17 PM, Michael Wang wrote:
> On 07/02/2013 04:25 PM, Srivatsa S. Bhat wrote:
>> Hi Michael,
>>
>> On 07/02/2013 11:02 AM, Michael Wang wrote:
>>> Hi, Srivatsa
>>>
>>> On 06/28/2013 03:54 AM, Srivatsa S. Bhat wrote:
>>> [snip]
@@ -625,8 +632,9 @@ EXPORT_SYMBOL(on_each_cpu_mask)
On 07/02/2013 04:25 PM, Srivatsa S. Bhat wrote:
> Hi Michael,
>
> On 07/02/2013 11:02 AM, Michael Wang wrote:
>> Hi, Srivatsa
>>
>> On 06/28/2013 03:54 AM, Srivatsa S. Bhat wrote:
>> [snip]
>>> @@ -625,8 +632,9 @@ EXPORT_SYMBOL(on_each_cpu_mask);
>>> * The function might sleep if the GFP flags i
Hi Michael,
On 07/02/2013 11:02 AM, Michael Wang wrote:
> Hi, Srivatsa
>
> On 06/28/2013 03:54 AM, Srivatsa S. Bhat wrote:
> [snip]
>> @@ -625,8 +632,9 @@ EXPORT_SYMBOL(on_each_cpu_mask);
>> * The function might sleep if the GFP flags indicates a non
>> * atomic allocation is allowed.
>> *
Hi, Srivatsa
On 06/28/2013 03:54 AM, Srivatsa S. Bhat wrote:
[snip]
> @@ -625,8 +632,9 @@ EXPORT_SYMBOL(on_each_cpu_mask);
> * The function might sleep if the GFP flags indicates a non
> * atomic allocation is allowed.
> *
> - * Preemption is disabled to protect against CPUs going offline bu
Once stop_machine() is gone from the CPU offline path, we won't be able
to depend on disabling preemption to prevent CPUs from going offline
from under us.
Use the get/put_online_cpus_atomic() APIs to prevent CPUs from going
offline, while invoking from atomic context.
Cc: Andrew Morton
Cc: Wang
6 matches
Mail list logo
