Re: EFAULT reading /dev/mem... - broken x86info

[Manfred Spraul <manfred@colorfullife.com>]

Dave Jones wrote:

>I don't really have much insight into the behind the scenes going on's of
>DEBUG_PAGEALLOC, so I don't know if your suggestion has merit or not.
>Maybe Manfred can shed some insight?
>
DEBUG_PAGEALLOC is not the only user of change_page_attr: gart also 
removes it's pages from the linear mapping.
I think x86info should accept the -EFAULT as an indication that the 
targeted page is in use for other purpose, and definitively doesn't 
contain a mptable. The other option would be to change both 
DEBUG_PAGEALLOC and the AGP gart driver

>  This does seem to be a regression IMO
>(Though I am somewhat biased as this breaks my app 8-)
>
It breaks either your app or your AGP driver - what's simpler to fix? 
I'm biased, because if you update the AGP driver, then I must figure out 
how to fix DEBUG_PAGEALLOC 8-)

--
    Manfred