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Message-ID: <20140124195014.GB29981@linutronix.de> Date: Fri, 24 Jan 2014 20:50:14 +0100 From: Sebastian Andrzej Siewior <bigeasy@...utronix.de> To: Mike Galbraith <bitbucket@...ine.de> Cc: paulmck@...ux.vnet.ibm.com, linux-rt-users@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de> Subject: Re: [PATCH] rcu: Eliminate softirq processing from rcutree * 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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