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Message-ID: <20120921203149.GI28835@atomide.com> Date: Fri, 21 Sep 2012 13:31:49 -0700 From: Tony Lindgren <tony@...mide.com> To: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> Cc: Paul Walmsley <paul@...an.com>, "Bruce, Becky" <bbruce@...com>, "Paul E. McKenney" <paul.mckenney@...aro.org>, "<linux-kernel@...r.kernel.org>" <linux-kernel@...r.kernel.org>, "<linux-omap@...r.kernel.org>" <linux-omap@...r.kernel.org>, "<linux-arm-kernel@...ts.infradead.org>" <linux-arm-kernel@...ts.infradead.org>, "Hilman, Kevin" <khilman@...com>, "Shilimkar, Santosh" <santosh.shilimkar@...com>, "Hunter, Jon" <jon-hunter@...com>, "<snijsure@...d-net.com>" <snijsure@...d-net.com>, fweisbec@...il.com Subject: Re: rcu self-detected stall messages on OMAP3, 4 boards * Paul E. McKenney <paulmck@...ux.vnet.ibm.com> [120921 12:58]: > > Just to make sure I understand the combinations: > > o All stalls have happened when running a minimal userspace. > o CONFIG_NO_HZ=n suppresses the stalls. > o CONFIG_RCU_FAST_NO_HZ (which depends on CONFIG_NO_HZ=y) has > no observable effect on the stalls. The reason why you may need minimal userspace is to cut down the number of timers waking up the system with NO_HZ. Booting with init=/bin/sh might also do the trick for that. Regards, Tony -- 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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