Messages in this thread | | | Date | Sat, 15 Dec 2012 11:41:03 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [GIT PULL] x86/uapi for 3.8 |
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On 12/15/2012 10:35 AM, Linus Torvalds wrote: > On Sat, Dec 15, 2012 at 8:33 AM, Markus Trippelsdorf > <markus@trippelsdorf.de> wrote: >> On 2012.12.14 at 17:47 -0800, Linus Torvalds wrote: >>> >>> Ho humm. Anybody else see anything strange? >> >> Yes. I'm seeing a BUG early during boot on my machine (RIP=NULL): >> >> BUG: unable to handle kernel NULL pointer dereference at (null) >> >> This is caused by commit 53b87cf088e2 ("x86, mm: Include the >> entire kernel memory map in trampoline_pgd") > > Hmm. That reverts cleanly, and the result boots fine for me. And the > commit looks like exactly the kind of thing that could result in > problems with exactly the right memory layout, so it could explain why > the bisect failed and some kernels randomly worked for me and others > didn't. > > So this at least looks like a very possible candidate. > > Does anybody have an explanation for the problem? > > Btw. the machine in question does not have EFI, and is a bog-standard > PC (DMI string: "P7H57D-V EVO, BIOS 0999 01/19/2010") > > Matt? Jan? >
Matt is on vacation, and I'm partly offline for the weekend, but that definitely seems suspicious. Do we have a memory map of the affected machine(s)?
-hpa
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