Re: port-amd64/52596 (Another netbsd-8 panic)

[Kamil Rytarowski <n54%gmx.com@localhost>]

The following reply was made to PR port-amd64/52596; it has been noted by GNATS.

From: Kamil Rytarowski <n54%gmx.com@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: port-amd64/52596 (Another netbsd-8 panic)
Date: Mon, 9 Oct 2017 14:58:28 +0200

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 From: Kamil Rytarowski <n54%gmx.com@localhost>
 To: gnats-bugs%NetBSD.org@localhost
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 Subject: Re: port-amd64/52596 (Another netbsd-8 panic)
 References: <pr-port-amd64-52596%gnats.netbsd.org@localhost>
  <20171006053940.1CB755CD8%yenn.ulegend.net@localhost>
  <20171009124001.6CD267A2AC%mollari.NetBSD.org@localhost>
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 On 09.10.2017 14:40, Dominik Bialy wrote:
 > The following reply was made to PR port-amd64/52596; it has been noted =
 by GNATS.
 >=20
 > From: Dominik Bialy <dmb%yenn.ulegend.net@localhost>
 > To: coypu%sdf.org@localhost
 > Cc: Dominik Bialy <dmb%yenn.ulegend.net@localhost>, gnats-bugs%NetBSD.org@localhost
 > Subject: Re: port-amd64/52596 (Another netbsd-8 panic)
 > Date: Mon, 9 Oct 2017 14:37:47 +0200
 >=20
 >  On Mon, Oct 09, 2017 at 10:13:34AM +0000, coypu%sdf.org@localhost wrote:
 >  > On Mon, Oct 09, 2017 at 10:01:47AM +0200, Dominik Bialy wrote:
 >  > > Current sysctls are:
 >  > >=20
 >  > > yenn# sysctl machdep.xsave_features
 >  > > machdep.xsave_features =3D 0
 >  > > yenn# sysctl machdep.fpu_save
 >  > > machdep.fpu_save =3D 1
 >  > >=20
 >  > > I'll try applying the patch today and building the kernel.
 >  >=20
 >  > sorry, I misread the code, it shouldn't make a functional difference=
 
 >  > either way.
 >  >=20
 >  > do you have a coredump in /var/crash?
 >  > can you:
 >  > gunzip netbsd.3.core.gz
 >  > gunzip netbsd.3.gz
 >  > crash -M netbsd.3.core -N netbsd.3
 >  >=20
 >  > crash> dmesg
 >  > (only to confirm it died at the same spot)
 >  > crash> examine x86_xsave_features
 >  > crash> bt
 > =20
 >  I found one coredump from Sep 23 (sources were
 >  dated around Sep 15.)
 > =20
 >  fatal privileged instruction fault in supervisor mode
 >  trap type 0 code 0 rip 0xffffffff80224a52 cs 0x8 rflags 0x10016 cr2 0x=
 75ba90c36d60 ilevel 0x8 rsp 0xfffffe804057
 >  bea8
 >  curlwp 0xfffffe81318c2720 pid 391.2 lowest kstack 0xfffffe80405792c0
 >  panic: trap
 >  cpu1: Begin traceback...
 >  vpanic() at netbsd:vpanic+0x140
 >  snprintf() at netbsd:snprintf
 >  startlwp() at netbsd:startlwp
 >  alltraps() at netbsd:alltraps+0x96
 >  fpudna() at netbsd:fpudna+0x61
 >  cpu1: End traceback...
 > =20
 >  dumping to dev 18,1 (offset=3D132519, size=3D1032011):
 >  dump
 >  crash> examine x86_xsave_features
 >  x86_xsave_features:     160b78a0
 
 Looks like trash..
 
 Please try:
 examine x86_fpu_save_size
 examine x86_fpu_save
 examine i386_nocpuid_cpus
 
 (checking if the stack has been damaged)
 
 >  crash> bt
 >  _KERNEL_OPT_NARCNET() at 0
 >  _KERNEL_OPT_ACPI_SCANPCI() at _KERNEL_OPT_ACPI_SCANPCI+0x7
 >  vpanic() at vpanic+0x149
 >  snprintf() at snprintf
 >  startlwp() at startlwp
 >  calltrap() at calltrap+0x11
 >  fpudna() at fpudna+0x61
 >  crash>
 > =20
 >=20
 
 
 
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