Date: Sun, 22 Mar 2015 19:15:01 +0100 From: Olivier Houchard <mlfbsd@ci0.org> To: Michael Tuexen <tuexen@freebsd.org> Cc: "freebsd-arm@freebsd.org" <arm@freebsd.org> Subject: Re: panic: pmap_demote_section: No l2_bucket for wired mapping Message-ID: <20150322181501.GA40209@ci0.org> In-Reply-To: <667A250D-91AC-4B81-97E3-4C351BB35577@freebsd.org> References: <AF7A0CA1-6A0C-47CC-B096-646BBD235862@freebsd.org> <20150322151934.GA31108@ci0.org> <667A250D-91AC-4B81-97E3-4C351BB35577@freebsd.org>
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On Sun, Mar 22, 2015 at 01:05:43PM -0500, Michael Tuexen wrote: > > On 22 Mar 2015, at 10:19, Olivier Houchard <mlfbsd@ci0.org> wrote: > > > > On Sun, Mar 22, 2015 at 06:54:06AM -0500, Michael Tuexen wrote: > >> Dear all, > >> > > > > Hi Michael, > > > >> running head on a Raspberry Pi became unstable. When running > >> r280329 for a while (the machine is exposed to the Internet, so > >> ssh logins are continuously tried), the machine panics: > >> > >> panic: pmap_demote_section: No l2_bucket for wired mapping > >> > >> It might be related to > >> https://svnweb.freebsd.org/changeset/base/280324 > >> > >> Any idea what is going on? > >> > > > > Doest backing rev 280324 out fixes it ? I'm at a loss as to why my commit > OK, testing done. Backing out 280324 does NOT help. So the issue is not related > to this patch. > Disabling superpages helps to work around the issue. > Is there any specific workload on your RPi, beside getting ssh-scanned ? Who has PID 15, and suffer such an unfortunate doom while trying to demote pages ? Regards, Olivier
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