Re: [PATCH 2/2] rcu: Don't dump the stalled CPU on where RCU GP kthread last ran twice

[Leizhen (ThunderTown)]

On 2023/7/11 4:32, Paul E. McKenney wrote:
> On Mon, Jul 10, 2023 at 03:55:16PM -0400, Joel Fernandes wrote:
>> On Mon, Jul 10, 2023 at 3:06 PM Paul E. McKenney <paulmck@xxxxxxxxxx> wrote:
>>>
>>> On Wed, Jul 05, 2023 at 03:30:20PM +0800, Zhen Lei wrote:
>>>> The stacks of all stalled CPUs will be dumped. If the CPU on where RCU GP
>>>> kthread last ran is stalled, its stack does not need to be dumped again.
>>>>
>>>> Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx>
>>>
>>> This one looks good.  Please feel free to rebase it before 1/2 and repost.
>>
>> Just a small comment:
>> I wondered if this would make it harder to identify which stack among
>> the various CPU stacks corresponds to the one the GP kthread is
>> running on. However, this line does print the CPU number of the
>> thread, so it is perhaps not an issue:
>>
>>                 pr_err("%s kthread starved for %ld jiffies! g%ld f%#x
>> %s(%d) ->state=%#x ->cpu=%d\n",
>>
>> Reviewed-by: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
> 
> Thank you!  Zhen Lei, please feel free to add Joel's Reviewed-by on your
> next posting.

OK

> 
> 							Thanx, Paul
> .
> 

-- 
Regards,
  Zhen Lei