Re: [Xen-devel] [PATCH for-4.5 0/2] Improve "Emulation failed" error message

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Fri, Sep 26, 2014 at 11:10:05AM +0100, Andrew Cooper wrote:
> After wanting to improve this error for a long time, I have encountered two
> cases in the past 2 days where I have needed more information than it
> provided, so have finally gotten around to fixing it.
> 
> Patch 1 introduces a "print hex buffer" custom %p format (compatible with the
> Linux equivelent), while Patch 2 improves the error message.
> 
> Konrad: I am requesting a release ack for this as it is a non-feature change
> for the purpose of improving error messages.  Neither of the patches are
> complicated (low risk of bugs/regressions), and if the worse comes to the
> worst, they can safely be reverted.

Yes. I think these can go in, even if they are not considered bug-fixes
but rather features to help developers/users in the field.

And conveniently I have an excellent test-case so I can test this
and make sure it does not cause regressions.

> 
> Andrew Cooper (2):
>   xen/vsprintf: Introduce %*ph extended format specifier for hex
>     buffers
>   x86/hvm: Improve "Emulation failed @" error messages
> 
>  docs/misc/printk-formats.txt      |    6 ++++++
>  xen/arch/x86/hvm/emulate.c        |   41 
> +++++++++++++++++++++++++++++--------
>  xen/arch/x86/hvm/io.c             |   11 +---------
>  xen/arch/x86/hvm/vmx/realmode.c   |    9 +-------
>  xen/common/vsprintf.c             |   25 ++++++++++++++++++++++
>  xen/include/asm-x86/hvm/emulate.h |    3 +++
>  6 files changed, 68 insertions(+), 27 deletions(-)
> 
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