Re: [tip:x86/debug] x86/kdump: No need to disable ioapic/ lapic in crash path

2012-02-17 Thread Eric W. Biederman
Don Zickus writes: > On Fri, Feb 17, 2012 at 04:41:01AM -0800, Eric W. Biederman wrote: >> >> The fix with a guarantee of no more scope creep is to just disable the >> nmi watchdog on the kexec on panic path. >> >> Don if you have time please figure out is needed to ignore nmi's and >> possible

Re: [tip:x86/debug] x86/kdump: No need to disable ioapic/ lapic in crash path

2012-02-17 Thread Don Zickus
On Sat, Feb 18, 2012 at 12:49:16AM +0900, HATAYAMA Daisuke wrote: > A few days ago I investigted the case where system is reseted due to > triple fault caused by the NMI after idt is disabled in > machine_kexec. I didn't see the reset when trigering the kdump with > NMI since the NMI is masked unti

Re: [tip:x86/debug] x86/kdump: No need to disable ioapic/ lapic in crash path

2012-02-17 Thread Don Zickus
On Fri, Feb 17, 2012 at 04:41:01AM -0800, Eric W. Biederman wrote: > > The fix with a guarantee of no more scope creep is to just disable the > nmi watchdog on the kexec on panic path. > > Don if you have time please figure out is needed to ignore nmi's and > possible record and/or report them wh

Re: [tip:x86/debug] x86/kdump: No need to disable ioapic/ lapic in crash path

2012-02-17 Thread HATAYAMA Daisuke
2012/2/17 Eric W. Biederman : > ebied...@xmission.com (Eric W. Biederman) writes: > >> Don Zickus writes: >> >>> On Thu, Feb 16, 2012 at 01:53:29PM -0800, Yinghai Lu wrote: On Thu, Feb 16, 2012 at 9:27 AM, Don Zickus wrote: > So I think I figured it out.  I went through and comment

Re: [tip:x86/debug] x86/kdump: No need to disable ioapic/ lapic in crash path

2012-02-17 Thread Eric W. Biederman
ebied...@xmission.com (Eric W. Biederman) writes: > Don Zickus writes: > >> On Thu, Feb 16, 2012 at 01:53:29PM -0800, Yinghai Lu wrote: >>> On Thu, Feb 16, 2012 at 9:27 AM, Don Zickus wrote: >>> >>> > So I think I figured it out.  I went through and commented out code in >>> > disable_local_API

Re: [PATCH v1 0/4][makedumpfile] vmalloc translation support for PPC32

2012-02-17 Thread Benjamin Herrenschmidt
On Fri, 2012-02-17 at 11:25 +0530, Suzuki K. Poulose wrote: > > Could you tell me what kind of data is stored in vmalloc region in > PPC ? > > I want to estimate importance of your patches for makedumpfile. > I know at least the modules are loaded in the vmalloc'd region. I have > Cc'ed linux-ppc d