On Wed, 6 Aug 2014 22:48+0200, Trond Endrestøl wrote: > On Wed, 6 Aug 2014 19:21+0200, Trond Endrestøl wrote: > > > On Tue, 5 Aug 2014 20:49-0700, John Baldwin wrote: > > > > > > > > On Aug 5, 2014, at 2:29 PM, Michael Butler <imb_at_protected-networks.net> wrote: > > > > > > > On 08/05/14 16:56, Michael Butler wrote: > > > >> On 08/05/14 16:02, John Baldwin wrote: > > > >> > > > >>> My guess is that the recent Xen changes tickled something. > > > >> > > > >> I can confirm this on a kernel which is otherwise up to date .. > > > >> > > > >> FreeBSD toshi.auburn.protected-networks.net 11.0-CURRENT FreeBSD > > > >> 11.0-CURRENT #2 r269608M: Tue Aug 5 16:48:12 EDT 2014 > > > >> > > > >> I backed out all of SVN r269507 through r269515. > > > >> > > > >> Now working .. > > > > > > > > [ .. snip .. ] > > > > > > > >> Now to see if it's related to the other machine's disk woes (it's a > > > >> single-core device), > > > > > > > > And it fixes the inability to probe disks on my single-core machine :-) > > > > > > It looks like the MADT code to probe the I/O APICs isn't working so > > > it's trying to fall back to using the ATPIC while using SMP (which > > > doesn't work). I know it's a pain on a laptop, but if it is at all > > > possible to capture either a verbose or non-verbose dmesg that would > > > really help narrow it down. > > > > > > Also, if anyone can try reverting just the MADT-related changes in > > > the recent Xen changes to see if you can narrow down which exact one > > > triggers the panic that would be really helpful. > > > > I noticed this panic on i386 head r269607 yesterday, running in VBox > > on Windows 7 SP1 x64, on an Intel(R) Core(TM) i7 CPU 960 _at_ 3.20GHz > > (3175.67-MHz 686-class CPU). > > > > Go to http://ximalas.info/~trond/atpic_assign_cpu/ where you'll find a > > verbose dmesg from i386 head r268838 from the same VM and a couple of > > screenshots of the crash while booting r269607 with the verbose flag > > on. > > > > I'm rewinding /usr/src to r269507, and I'll take it from there, one > > commit at the time. > > Reverting r269510 did the trick, i.e.: > > cd /usr/src && svn up && svn diff -r 269510:269509 | patch > > My i386 head VM is running smoothly with r269641M, with M meaning only > the above reversal. > > > I'll also try to investigate this panic using my amd64 head VM. > > Work in progress. amd64 is unaffected, as r269644 worked without any modifications. I'm guessing the changes to sys/x86/x86/local_apic.c and sys/x86/xen/xen_intr.c come as a pair. If not, then the changes done to sys/x86/x86/local_apic.c is the culprit somehow. Trond, going to bed. -- +-------------------------------+------------------------------------+ | Vennlig hilsen, | Best regards, | | Trond Endrestøl, | Trond Endrestøl, | | IT-ansvarlig, | System administrator, | | Fagskolen Innlandet, | Gjøvik Technical College, Norway, | | tlf. mob. 952 62 567, | Cellular...: +47 952 62 567, | | sentralbord 61 14 54 00. | Switchboard: +47 61 14 54 00. | +-------------------------------+------------------------------------+Received on Wed Aug 06 2014 - 19:45:11 UTC
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