From mboxrd@z Thu Jan 1 00:00:00 1970 From: pthomas8589@gmail.com (Paul Thomas) Date: Thu, 28 Jan 2010 21:40:15 -0700 Subject: at91san9g20, INFO: RCU detected CPU 0 stall Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hello, I'm getting the following errors on the console: INFO: RCU detected CPU 0 stall (t=1000 jiffies) INFO: RCU detected CPU 0 stall (t=4000 jiffies) INFO: RCU detected CPU 0 stall (t=7000 jiffies) ... The system is mostly unresponsive at this point. The console & ssh are unresponsive, but ping still works (Is that just the PHY responding?). I'm pretty sure this is because I enabled NO_HZ, HIGH_RES_TIMERS, CONFIG_PREEMPT & ATMEL_TCLIB in the kernel. I've attached the .config file. I'm using 2.6.33-rc2 without the maxim.org.za patch, and one minor socket-can patch. I'm been using various versions of this same kernel for weeks without any problems, and just today I wanted to use the high res timers so I enabled that stuff in the kernel. I'm using the at91sam9g20 processor. I don't think it matters, but the command that triggered this was "svn --version". After a reboot the "svn --version" command is fine. What does this error/info mean? How is it different from a kernel panic? Have other people seen this on the at91 devices? thanks, Paul -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: .config Type: application/octet-stream Size: 33497 bytes Desc: not available URL: