On Thu, 9 Mar 2017 06:00:23 +0000 Dexuan Cui <de...@microsoft.com> wrote
> Hi Roberto, > Thanks for sending me your memmap and this is a temporary workaround > patch for you: > https://github.com/dcui/freebsd/commit/0edd1db55fbbb56352d6024250e4ae7dd8ad31 > e3.patch > > I put the memmap info here for people who're interested: > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211746#c26 > > We can notice there is a 4MB BootServicesCode range at [12MB, 16MB) . > loader.efi just writes into this range by force -- this is unsafe anyway! > > To fix this correctly & thoroughly, IMO we need a relocatable kernel, but > that would require a lot of complicated long term work: > https://reviews.freebsd.org/D9686?id=25414#inline-56969 > > For now, I suggest we should only apply the idea "reduce the size of the > staging area if necessary" to VM running on Hyper-V, we should restore the > old behavior on physical machines since that has been working for people > for a long period of time, though it's potentially unsafe. > > I think in the loader we can use CPUID to tell if we're running on Hyper-V or > not. Indeed that will provide *capability*. But I'm don't think that can tell you that it is currently *enabled* || *in use*. The CPU I experienced the (u)efi issue on has the capability, but I've turned it off, as it's more hindrance for performance, for the server' intended use. IOW I think just probing for *capability* isn't going to be enough. --Chris > > Thanks, > -- Dexuan > > > -----Original Message----- > > From: owner-freebsd-curr...@freebsd.org [mailto:owner-freebsd- > > curr...@freebsd.org] On Behalf Of Dexuan Cui > > Sent: Thursday, March 9, 2017 10:44 > > To: Roberto Rodriguez Jr <rob.rodz....@gmail.com> > > Cc: FreeBSD Current <email@example.com> > > Subject: RE: input/output error @boot > > > > Hmm, Alex did report 314891 worked. > > > > Can you please post the full boot log of the loader? > > Especially, when you see the “OK” prompt, can you please run the “memmap” > > command like this link ... > > > > You can take a photo of the screen and send it to me, if it’s too big. > > > > Thanks, > > -- Dexuan > _______________________________________________ firstname.lastname@example.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"