Date: Wed, 19 Aug 2015 04:38:34 +0300 From: Dmitry Marakasov <amdmi3@amdmi3.ru> To: Ian Lepore <ian@freebsd.org> Cc: "freebsd-arm@FreeBSD.org" <freebsd-arm@FreeBSD.org> Subject: Re: Instability likely related to new pmap on Cubieboard A10 Message-ID: <20150819013834.GD79354@hades.panopticon> In-Reply-To: <1439944961.242.150.camel@freebsd.org> References: <20150819002103.GC79354@hades.panopticon> <1439944961.242.150.camel@freebsd.org>
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* Ian Lepore (ian@freebsd.org) wrote: > > I've just tried latest HEAD on cubieboard A10, and discovered that > > it's completely unstable. Kernel boots without problems, however > > right after init is started many processes crash with sigsegv and > > other errors, and it ends with either hang or a panic. Examples > > below. With kernel built with `nooptions ARM_NEW_PMAP' these > > problems go away. Feel free to ask for any additional info. > > > > --- > > [...] > > --- > > That is, frankly, just hard to accept as real. ARM_NEW_PMAP has been > the default for like 8 months. If it was that broken, the first report > of it would have come in much earlier than this. That seems more like > some sort of broken or corrupted binary, and perhaps the problem went > away not because the option changed, but because changing the option > rebuilt whatever was corrupted. > > Actually, given that everything was fine until userland started, and > "bad syscall" shows up a lot in the errors, a kernel/userland mismatch > also seems like a good candidate. I've just rebuilt it again just to be sure, same thing - kernel with ARM_NEW_PMAP misbehaves. I'd add: - Both kernels were built with the same commands, from the same revision and with the clean /usr/obj; only difference is presence of `nooptions ARM_NEW_PMAP` - Both kernels use the same world, built from the same revision. It was not touched when changing kernels -- Dmitry Marakasov . 55B5 0596 FF1E 8D84 5F56 9510 D35A 80DD F9D2 F77D amdmi3@amdmi3.ru ..: jabber: amdmi3@jabber.ru http://amdmi3.ru
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