From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <535900C9.7@xenomai.org> Date: Thu, 24 Apr 2014 14:17:13 +0200 From: Philippe Gerum MIME-Version: 1.0 References: <534BD45B.8070402@xenomai.org> <534D44CA.3000105@xenomai.org> <534E926F.9090706@xenomai.org> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai] Slow execution of RT task List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Jeroen Van den Keybus Cc: "xenomai@xenomai.org" On 04/24/2014 12:21 PM, Jeroen Van den Keybus wrote: > Philippe, > > > Disabling CONFIG_RCU_USER_QS ('General setup -> RCU Subsystem -> > Consider userspace as in RCU extended quiescent state') at least > avoids the warning. > > Further investigation shows that it is actually > CONFIG_CONTEXT_TRACKING_FORCE ('General setup -> RCU Subsystem -> > Force context tracking') that seems to cause the issue > (CONFIG_RCU_USER_QS and CONFIG_CONTEXT_TRACKING still enabled in this > case). > Ok, thanks for digging this. I'll switch back to investigating this issue in the coming days. Gilles has detected a breakage of the interrupt state on ARM which is caused by the context tracking feature, there is a possibility that such issue also concerns other archs. I still have to come up with a solution to this problem. -- Philippe.