Re: [Devel] double faults in Virtuozzo KVM

2017-09-29 Thread Roman Kagan
On Fri, Sep 29, 2017 at 11:25:20AM +0300, Denis Kirjanov wrote: > >> > > _Some_ of them related to the fact that during the faults RSP points > >> > > to userspace and it leads to double-fault scenario. > >> > > >> > The postmortem you quote doesn't support that. > >> > >> > >> I'll post a

Re: [Devel] double faults in Virtuozzo KVM

2017-09-29 Thread Denis Kirjanov
>> > > _Some_ of them related to the fact that during the faults RSP points >> > > to userspace and it leads to double-fault scenario. >> > >> > The postmortem you quote doesn't support that. >> >> >> I'll post a relevant trace Here it is: [32065.459255] double fault: [#1] SMP

Re: [Devel] double faults in Virtuozzo KVM

2017-09-29 Thread Roman Kagan
On Fri, Sep 29, 2017 at 12:02:37AM +0300, Denis Kirjanov wrote: > On Thursday, September 28, 2017, Roman Kagan wrote: > > On Thu, Sep 28, 2017 at 05:55:51PM +0300, Denis Kirjanov wrote: > > > Hi, we're seeing double faults in async_page_fault. > > > > async_page_fault is the

Re: [Devel] double faults in Virtuozzo KVM

2017-09-28 Thread Denis Kirjanov
On Thursday, September 28, 2017, Roman Kagan wrote: > On Thu, Sep 28, 2017 at 05:55:51PM +0300, Denis Kirjanov wrote: > > Hi, we're seeing double faults in async_page_fault. > > async_page_fault is the #PF handler in KVM guests. It filters out > specially crafted #PF's

Re: [Devel] double faults in Virtuozzo KVM

2017-09-28 Thread Vasily Averin
Dear Denis, no, we know nothing about this problem. Could you please create bug in opnevz jira? Thank you, Vasily Averin On 2017-09-28 17:55, Denis Kirjanov wrote: > Hi, we're seeing double faults in async_page_fault. > _Some_ of them related to the fact that during the faults RSP points

[Devel] double faults in Virtuozzo KVM

2017-09-28 Thread Denis Kirjanov
Hi, we're seeing double faults in async_page_fault. _Some_ of them related to the fact that during the faults RSP points to userspace and it leads to double-fault scenario. Is it known problem? Thanks! [11587.895394] Hardware name: Virtuozzo KVM, BIOS 1.9.1-5.3.2.vz7.6 04/01/2014 [11587.895394]