Re: [PATCH] rcu: Eliminate softirq processing from rcutree

[Sebastian Andrzej Siewior]

* Mike Galbraith | 2014-01-18 04:25:14 [+0100]:

>> ># timers-do-not-raise-softirq-unconditionally.patch
>> ># rtmutex-use-a-trylock-for-waiter-lock-in-trylock.patch
>> >
>> >..those two out does seem to have stabilized the thing.
>> 
>> timers-do-not-raise-softirq-unconditionally.patch is on its way out.
>> 
>> rtmutex-use-a-trylock-for-waiter-lock-in-trylock.patch confues me.
>> Didn't you report once that your box deadlocks without this patch? Now
>> your 64way box on the other hand does not work with it?
>
>If 'do not raise' is applied, 'use a trylock' won't save you.  If 'do
is this just an observation or you do know why it won't save me?
Currently I think to go back to the version where the waiter_lock was
taken with irqs off. However I would prefer to trigger this myself so I
would know what is going on instead blindly apply patches.

>-Mike

Sebastian
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