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Date: Mon, 04 Oct 2010 10:46:26 +0200 From: Zdenek Kabelac <zkabelac@...hat.com> To: chich21@...l.com CC: linux-kernel@...r.kernel.org Subject: Re: Linux kernel 2.6.34.7 lvm error Dne 3.10.2010 11:56, chich21@...l.com napsal(a): > With Linux kernel 2.6.34.7 from www.kernel.org the following error occurs. > > Issuing this command produces error. > > vgchange -ay > > outputs: > Internal error: Maps lock 14317216 < unlock 14321312 > > vgchange is part of lvm-tools. > > This doesn't happen with kernel 2.6.34 or 2.6.34.1 from www.kernel.org. > > Is there a patch for 2.6.34.x series coming for this error. As there is one > for 2.6.35.x series. > > Please CC email me related posts. Bug is related to stack guard fix - kernel 2.6.36-rc4 has this problem fixed. Bug is present in 2.6.36-rc3 - so something between them fixes the problem. It looks like the [stack] mapping loses 1 page after each mlock/munlock cycle. I'm probably going to play bisect game to find out missing fix. https://bugzilla.redhat.com/show_bug.cgi?id=638525 Meanwhile lvm tools were also updated to read whole mapping table before locking pages to avoid reading some mapping lines twice. Zdenek. -- 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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