Date: Sun, 8 Dec 2013 09:31:30 -0800 From: Justin Hibbits <jhibbits@freebsd.org> To: Marius Strobl <marius@alchemy.franken.de> Cc: FreeBSD Current <freebsd-current@freebsd.org>, FreeBSD PowerPC ML <freebsd-ppc@freebsd.org> Subject: Re: Request for testing an alternate branch Message-ID: <CAHSQbTCiHxe0O6cj%2B=OMRQSMNsQsWv4hw=fnNmdJGbQQ=EsHFQ@mail.gmail.com> In-Reply-To: <20131208133853.GA75604@alchemy.franken.de> References: <20131204222113.39fb23dd@zhabar.gateway.2wire.net> <20131208133853.GA75604@alchemy.franken.de>
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On Dec 8, 2013 5:39 AM, "Marius Strobl" <marius@alchemy.franken.de> wrote: > > On Wed, Dec 04, 2013 at 10:21:13PM -0800, Justin Hibbits wrote: > > I've been working on the projects/pmac_pmu branch for some time now to > > add suspend/resume as well as CPU speed change for certain PowerPC > > machines, about a year since I created the branch, and now it's stable > > enough that I want to merge it into HEAD, hence this request. However, > > it does touch several drivers, turning them into "early drivers", such > > that they can be initialized, and suspended and resumed at a different > > time. Saying that, I do need testing from other architectures, to make > > sure I haven't broken anything. > > > > The technical details: > > > > To get proper ordering, I've extended the bus_generic_suspend() and > > bus_generic_resume() to do multiple passes. Devices which cannot be > > enabled or disabled at the current pass level would return an EAGAIN. > > This could possibly cause problems, since it's an addition to an > > existing API rather than a new API to run along side it, so it needs a > > great deal of testing. It works fine on PowerPC, but I don't have any > > i386/amd64 or sparc64 hardware to test it on, so would like others who > > do to test it. I don't think that it would impact x86 at all (testing > > is obviously required), because the nexus is not an EARLY_DRIVER_MODULE, > > so all devices would be handled at the same pass. But, I do know the > > sparc64 has an EARLY_DRIVER_MODULE() nexus, so that will likely be > > impacted. > > > > Also, any comments are of course welcome. Technical concerns are > > obviously welcome, and I will try to address everything. > > Do you have a patch against head? > > Marius > I can generate one today. - Justin
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