Re: [PATCH] powerpc/8xx: Map a second 8M text page at startup when needed.

[Christophe Leroy]

Le 20/12/2018 Ã 09:24, Christoph Hellwig a ÃcritÂ:
> On Thu, Dec 20, 2018 at 05:48:25AM +0000, Christophe Leroy wrote:
> > Some debug setup like CONFIG_KASAN generate huge
> > kernels with text size over the 8M limit.
> >
> > This patch maps a second 8M page when _einittext is over 8M.
>
> Do we also need a check to generate a useful warning if we ever overflow
> the 16MB?

I don't think any other platform does that (the 40x also maps 16Mb, 
book3s/601 maps 24Mb)

But why not, could do that in another patch.

Is there an easy way to get the link to fail when CONFIG_PIN_TLB_TEXT is 
set and _einittext is higher than 16Mb ?

Or should we just map up to 24Mb on the 8xx and consider we are on the 
safe side with that much ?

Christophe