Re: [PATCH -rt] Revert "net: use synchronize_rcu_expedited()"
From: David Miller
Date: Fri Oct 30 2015 - 05:16:23 EST
From: Eric Dumazet <eric.dumazet@xxxxxxxxx>
Date: Tue, 27 Oct 2015 07:18:01 -0700
> On Tue, 2015-10-27 at 07:31 -0500, Josh Cartwright wrote:
>
>> Okay, yes, I like the first suggestion better as well, I've included a
>> patch below that does just that. I hope you don't mind me turning it
>> into a Suggested-by :).
>>
>> Thanks for taking a look!
>> Josh
>
>
>> @@ -6969,7 +6969,7 @@ EXPORT_SYMBOL(free_netdev);
>> void synchronize_net(void)
>> {
>> might_sleep();
>> - if (rtnl_is_locked())
>> + if (rtnl_is_locked() && !IS_ENABLED(CONFIG_PREEMPT_RT_FULL))
>> synchronize_rcu_expedited();
>> else
>> synchronize_rcu();
>
> No objection from me. Thanks.
>
> Acked-by: Eric Dumazet <edumazet@xxxxxxxxxx>
I agree with the sentiment to do the simple thing here first before
adding potentially useless knobs.
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
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