Date: Sun, 30 Sep 2012 01:49:39 +0300 From: Aleksandr Rybalko <ray@freebsd.org> To: Alan Cox <alc@rice.edu> Cc: "arm@freebsd.org" <arm@freebsd.org> Subject: Re: armv6 pmap patch Message-ID: <20120930014939.9d277f0d.ray@freebsd.org> In-Reply-To: <5066AB0D.6000901@rice.edu> References: <504BDC56.3060607@rice.edu> <20120910211817.2d8a340d@fubar.geek.nz> <504E1A1B.90101@rice.edu> <20120928160227.99d2b126.ray@dlink.ua> <5066AB0D.6000901@rice.edu>
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On Sat, 29 Sep 2012 03:02:21 -0500 Alan Cox <alc@rice.edu> wrote: > On 09/28/2012 08:02, Aleksandr Rybalko wrote: > > On Mon, 10 Sep 2012 11:49:31 -0500 > > Alan Cox<alc@rice.edu> wrote: > > > >>> On 09/10/2012 04:18, Andrew Turner wrote: > >>>> On Sat, 08 Sep 2012 19:01:26 -0500 > >>>> Alan Cox<alc@rice.edu> wrote: > >>>> > >>>>> Can someone here please test this patch to the new armv6 pmap? > >>>>> It eliminates the use of the page queues lock and updates some > >>>>> comments. Similar changes were recently made to the original arm > >>>>> pmap. > >>>>> > >>>>> Thanks, > >>>>> Alan > >>>>> > >>>> I have booted FreeBSD with the patch on a Pandaboard and it > >>>> appears to work. Are there any tests you would like me to run? > >>>> > >>> Nothing in particular, since almost anything that you do on the > >>> machine will exercise the changed code. > >>> > >>> There appears to be a lot of unnecessary dropping and reacquiring > >>> of locks around UMA calls in both pmap.c and pmap-v6.c. I will > >>> try to generate a patch to eliminate this later in the week. > >>> > >>> Alan > >>> > > Hi Alan and ARM hackers, > > > > Don't know exact, but think it is related to current pmap work. > > So here is two panics observed on R-Pi recently (HEAD @r240985), > > both on attempt to untar ports.tar.gz :) > > > > *snip* > > The attached patch should eliminate the panic. Please let me know > when you've had a chance to test it. I don't know when it done (extracting ports.tar.gz :) ) but it still works w/o panic :) Thanks a lot Alan! > > Alan > WBW -- Aleksandr Rybalko <ray@freebsd.org>
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