Re: [PATCH] powerpc/8xx: Map a second 8M text page at startup when needed.
From: Christophe Leroy
Date: Thu Dec 20 2018 - 03:50:07 EST
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
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 ?