Re: [Xen-devel] [PATCH 0/3] x86: fixes/improvements for scratch cpumask

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

On 12/02/2020 17:49, Roger Pau Monne wrote:
> Hello,
> 
> Commit:
> 
> 5500d265a2a8fa63d60c08beb549de8ec82ff7a5
> x86/smp: use APIC ALLBUT destination shorthand when possible
> 
> Introduced a bogus usage of the scratch cpumask: it was used in a
> function that could be called from interrupt context, and hence using
> the scratch cpumask there is not safe. Patch #2 is a fix for that usage.
> 
> Patch #3 adds some debug infrastructure to make sure the scratch cpumask
> is used in the right context, and hence should prevent further missuses.
> 
> Thanks, Roger.

Hi Roger,

Do you still want me to test the "panic" patch ?
Or test this series instead ?

--
Sander


> Roger Pau Monne (3):
>   x86/smp: unify header includes in smp.h
>   x86/smp: use a dedicated scratch cpumask in send_IPI_mask
>   x86: add accessors for scratch cpu mask
> 
>  xen/arch/x86/io_apic.c    |  6 ++++--
>  xen/arch/x86/irq.c        | 13 ++++++++++---
>  xen/arch/x86/mm.c         | 30 +++++++++++++++++++++---------
>  xen/arch/x86/msi.c        |  4 +++-
>  xen/arch/x86/smp.c        | 14 +++++++++++++-
>  xen/arch/x86/smpboot.c    | 33 ++++++++++++++++++++++++++++++++-
>  xen/include/asm-x86/smp.h | 15 +++++++++++----
>  7 files changed, 94 insertions(+), 21 deletions(-)
> 


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