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Message-ID: <47B89DC6.4070906@allied-internet.ag> Date: Sun, 17 Feb 2008 21:49:10 +0100 From: allied internet ag- Stefan Priebe <s.priebe@...ied-internet.ag> To: Christian Kujau <lists@...dbynature.de> CC: LKML <linux-kernel@...r.kernel.org>, jirislaby@...il.com Subject: Re: getting uninterruptible sleep processes after upgrade from 2.6.20.20 to 2.6.24.2 >> One week ago we upgraded about 300 servers from 2.6.20.20 to 2.6.24.2. > > Painfull. OK not really - i've tested the new kernel on all models. And it works fine... the DN state only comes sometimes - absolutely not reproducable. So my tests went OK and then we've done the update. I've now seen 5 servers in 7 days having this problem. >> Now we get sometimes dozent of processes in state DN. The system is >> completely idle - but the load is 20 or 90 or whatever. And it can >> only be "repaired" by rebooting the system. > > please post sysrq-t (echo t > /proc/sysrq-trigger) output. Sorry what key is sysrq? Can i also do this via SSH Console? > Did you test with *one* server before upgrading all 300? If not, please > do and try to upgrade in smaller steps, e.g. 2.6.20->2.6.21 and see when > it breaks. Add a few *DEBUG .config options, they may help narrowing > down the problem... Problem here is that it is not reproducable... Stefan -- 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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