Re: port-xen/45975 (panic: HYPERVISOR_mmu_update failed, ret: -22 during heavy activity)

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

The following reply was made to PR port-xen/45975; it has been noted by GNATS.

From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: gnats-admin%NetBSD.org@localhost, netbsd-bugs%NetBSD.org@localhost, 
riz%NetBSD.org@localhost
Subject: Re: port-xen/45975 (panic: HYPERVISOR_mmu_update failed, ret: -22
 during heavy activity)
Date: Mon, 13 Feb 2012 10:49:03 +0100

 On Sun, Feb 12, 2012 at 11:50:04PM +0000, Jeff Rizzo wrote:
 > The following reply was made to PR port-xen/45975; it has been noted by 
 > GNATS.
 > 
 > From: Jeff Rizzo <riz%netbsd.org@localhost>
 > To: gnats-bugs%NetBSD.org@localhost
 > Cc: 
 > Subject: Re: port-xen/45975 (panic: HYPERVISOR_mmu_update failed, ret: -22
 >  during heavy activity)
 > Date: Sun, 12 Feb 2012 15:45:28 -0800
 > 
 >  On 2/12/12 11:20 AM, bouyer%NetBSD.org@localhost wrote:
 >  > Please test the patch; I tested it succesfully on aXen 3.3 install
 >  > with amd64 and i386 domUs.
 >  >
 >  >
 >  
 >  I just got the panic on a Xen 4.1.2 domU with a 4 vcpu domU (4 physical 
 >  cores with 2 threads per core on the hardware) while testing the patch:
 >  
 >  panic: HYPERVISOR_mmu_update failed, ret: -22
 >  
 >  fatal breakpoint trap in supervisor mode
 >  trap type 1 code 0 rip ffffffff80134665 cs e030 rflags 246 cr2  
 >  7f7ff7e12000 cpl 6 rsp ffffa000b423dea0
 >  Stopped in pid 765.1 (sh) at    netbsd:breakpoint+0x5:  leave
 >  breakpoint() at netbsd:breakpoint+0x5
 >  vpanic() at netbsd:vpanic+0x1f2
 >  printf_nolog() at netbsd:printf_nolog
 >  xpq_queue_machphys_update() at netbsd:xpq_queue_machphys_update
 >  xen_kpm_sync() at netbsd:xen_kpm_sync+0x31
 >  pmap_enter_ma() at netbsd:pmap_enter_ma+0xe10
 >  pmap_enter() at netbsd:pmap_enter+0x35
 >  uvm_fault_lower_enter() at netbsd:uvm_fault_lower_enter+0xfe
 >  uvm_fault_internal() at netbsd:uvm_fault_internal+0xbf9
 >  trap() at netbsd:trap+0x5f5
 
 please also send the last few lines of 'xm dmesg' if possible.
 
 -- 
 Manuel Bouyer <bouyer%antioche.eu.org@localhost>
      NetBSD: 26 ans d'experience feront toujours la difference
 --