Re: [PATCH] do not try to sync identity map for non-mapped pages

[H. Peter Anvin]

On 04/07/2013 06:33 AM, Borislav Petkov wrote:
> 
> looks like we haven't whacked all the moles - I keep seeing this when
> testing 32-bit builds in qemu on latest Linus + tip. I'd guess this is
> still that /dev/mem accessing thing called wdm.
> 
> I'm still wondering though whether we should BUG_ON on a /dev/mem
> access?
> 

We shouldn't, no.  /dev/mem really needs to be fixed along a bunch of
axes.  Yes, it is privileged and extra creepy, but it should either work
or it should fail cleanly.

	-hpa

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