Date: Sat, 19 Sep 2009 21:24:24 +0200 From: Attilio Rao <attilio@freebsd.org> To: Dan Naumov <dan.naumov@gmail.com> Cc: FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org>, "C. C. Tang" <hiyorin@gmail.com> Subject: Re: 7.2-release/amd64: panic, spin lock held too long Message-ID: <3bbf2fe10909191224m6061d325h8bc1a389e195aa30@mail.gmail.com> In-Reply-To: <cf9b1ee00909190204q33ded00dyb86a4b53ed5194be@mail.gmail.com> References: <cf9b1ee00907061812r3da70018i1c8d8d12bb038a80@mail.gmail.com> <3bbf2fe10909121432x7bd4f7es497e9431c4e520d6@mail.gmail.com> <cf9b1ee00909121502v66566b46p754ed2f2e549555@mail.gmail.com> <4AB1A838.2040406@gmail.com> <3bbf2fe10909170216u29d994aj55c21efdfbc26ba5@mail.gmail.com> <4AB21005.6040104@gmail.com> <4AB36E1F.6080401@gmail.com> <cf9b1ee00909190204q33ded00dyb86a4b53ed5194be@mail.gmail.com>
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2009/9/19 Dan Naumov <dan.naumov@gmail.com>: > On Fri, Sep 18, 2009 at 2:25 PM, C. C. Tang <hiyorin@gmail.com> wrote: >>> Attilio Rao wrote: >>>> >>>> 2009/9/17 C. C. Tang <hiyorin@gmail.com>: >>>>>>> >>>>>>> Dan, is that machine equipped with Hyperthreading? >>>>>>> >>>>>>> Attilio >>>>>> >>>>>> Yes. It's an Intel Atom 330, which is a dualcore CPU with HT (4 cores >>>>>> visible in "top" as a result) >>>>> >>>>> Yes, mine is also Atom 330. >>>>> >>>>> I cannot test the patch because my machine is also in production now. >>>>> But I >>>>> have tested it with hyperthreading. >>>>> powerd with HyperThreading -> spin lock hold too long >>>>> powerd without HyperThreading -> no problem >>>>> no powerd with/without HyperThreading -> no problem >>>> >>>> But these are with the last patch I posted in? >>>> (specifically, for 7.2: >>>> http://www.freebsd.org/~attilio/sched_ule.diff >>>> ) >>>> >>>> So with the patch in, powerd and hyperthreading on you still get a >>>> deadlock? >>>> >>>> Attilio >>>> >>>> >> I have patched the sched_ule.c and did a make buildkernel & make >> installkernel (is buildworld and installworld necessary?), rebooted and the >> machine is running now. >> I will post here again if there is any update. > > Considering we are at RC1 right now, is there any chance this patch > makes it into 8.0 release if the patch fixes the issue and doesn't > cause any regressions? Unfortunately I can't test it myself right now, > so I have to rely on other people experiencing the same issue to see > if the patch fixes it. I alredy committed it to STABLE_8 and then it will make it for sure. Attilio -- Peace can only be achieved by understanding - A. Einstein
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