Messages in this thread | | | Date | Thu, 14 Jun 2012 13:56:09 -0700 | Subject | Re: Early boot panic on machine with lots of memory | From | Yinghai Lu <> |
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On Thu, Jun 14, 2012 at 2:50 AM, Sasha Levin <levinsasha928@gmail.com> wrote: > On Thu, 2012-06-14 at 12:20 +0900, Tejun Heo wrote: >> On Wed, Jun 13, 2012 at 11:38:55PM +0200, Sasha Levin wrote: >> > Hi all, >> > >> > I'm seeing the following when booting a KVM guest with 65gb of RAM, on latest linux-next. >> > >> > Note that it happens with numa=off. >> > >> > [ 0.000000] BUG: unable to handle kernel paging request at ffff88102febd948 >> > [ 0.000000] IP: [<ffffffff836a6f37>] __next_free_mem_range+0x9b/0x155 >> >> Can you map it back to the source line please? > > mm/memblock.c:583 > > phys_addr_t r_start = ri ? r[-1].base + r[-1].size : 0; > 97: 85 d2 test %edx,%edx > 99: 74 08 je a3 <__next_free_mem_range+0xa3> > 9b: 49 8b 48 f0 mov -0x10(%r8),%rcx > 9f: 49 03 48 e8 add -0x18(%r8),%rcx > > It's the deref on 9b (r8=ffff88102febd958).
that reserved.region is allocated by memblock.
can you boot with "memblock=debug debug ignore_loglevel" and post whole boot log?
Thanks
Yinghai -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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