Date: Tue, 17 Nov 2009 16:53:04 +0100 From: Kai Gallasch <gallasch@free.de> To: Andriy Gapon <avg@icyb.net.ua> Cc: freebsd-current@freebsd.org Subject: Re: 8.0RC2 amd64 - kernel panic running make buildworld Message-ID: <20091117165304.01676555@orwell.free.de> In-Reply-To: <4B025FA9.7020003@icyb.net.ua> References: <1031257439203@webmail57.yandex.ru> <hdc73v$4rt$1@ger.gmane.org> <941257966918@webmail42.yandex.ru> <200911111504.14906.jhb@freebsd.org> <20091112195932.5875387e@orwell.free.de> <4AFD140D.7010407@icyb.net.ua> <20091113144804.2c0fb90f@orwell.free.de> <4AFD655E.5020801@icyb.net.ua> <20091114022121.217dd831@orwell.free.de> <4AFE7A32.7060203@icyb.net.ua> <4B025FA9.7020003@icyb.net.ua>
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Am Tue, 17 Nov 2009 10:32:41 +0200 schrieb Andriy Gapon <avg@icyb.net.ua>: > on 14/11/2009 11:36 Andriy Gapon said the following: > > on 14/11/2009 03:21 Kai Gallasch said the following: > >> Hi. The patch did help for surviving a makeworld. > >> > >> But now I have another machine check exception with this server. It > >> happened with your patch active, and vm.pmap.pg_ps_enabled="1". I > >> copied data from a remote server by NFS mount to the instable > >> server. Destination was a local ZFS filesystem. > >> > >> ---------------- > >> > >> sonnenkraft:~ # MCA: CPU 7 UNCOR PCC OVER DTLB L1 error > >> MCA: Address 0xff800d860000 > > > > It's interesting because the same happened to me too, only in my > > case it was zpool scrub that triggered it. > > I will try to look into this further. > > > > Kai, > > the latest patch in the works, it's against a clean tree: > > diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c > index 44b71f3..ff35eb9 100644 > --- a/sys/amd64/amd64/pmap.c > +++ b/sys/amd64/amd64/pmap.c Andriy. I tested this latest patch of yours and until now the server did not panic any more with superpages enabled. It survived several makeworld -j8 and also copying many small files over NFS mount to local ZFS. Also "zfs scrub" did not provoke a panic. I'll notify you, should a machine check exception occur again. --Kai. -- For large values of one, one equals two, for small values of two.
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