From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: 2.4.19 on dual 1gig G4 funny slow down to kernel death experience From: Benjamin Herrenschmidt To: "Kevin B. Hendricks" Cc: linuxppc-dev@lists.linuxppc.org, Paul Mackerras In-Reply-To: <200302071629.28657.kevin.hendricks@sympatico.ca> References: <200302071629.28657.kevin.hendricks@sympatico.ca> Content-Type: text/plain Message-Id: <1044710873.9705.106.camel@zion.wanadoo.fr> Mime-Version: 1.0 Date: 08 Feb 2003 14:27:54 +0100 Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: On Fri, 2003-02-07 at 22:29, Kevin B. Hendricks wrote: > I just experienced the funny slow down until kernel death experience again > that I reported many months ago on my dual 1gig G4 machine (smp with 768 > meg of memory) > > The dmesg log is full of a long stream of the following > > wait_on_irq, CPU 0: > irq: -1 [0 0] > bh: 0 [0 0] Argh ! The global irq count should never _ever_ get to -1, that's very bad... Either some weird codepath I haven't manage to figure out, or, and that's what I'm afraid of, for some reasons, atomic operations between CPUs failed, which should obviously never happen ! Remind me which rev of the CPU it is ? Ben. ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/