[bug] 5.11-rc5 brought page allocation failure issue [ttm][amdgpu]

[David Rientjes]

On Sat, 30 Jan 2021, David Rientjes wrote:

> On Sun, 31 Jan 2021, Mikhail Gavrilov wrote:
> 
> > The 5.11-rc5 (git 76c057c84d28) brought a new issue.
> > Now the kernel log is flooded with the message "page allocation failure".
> > 
> > Trace:
> > msedge:cs0: page allocation failure: order:10,
> 
> Order-10, wow!
> 
> ttm_pool_alloc() will start at order-10 and back off trying smaller orders 
> if necessary.  This is a regression introduced in
> 
> commit bf9eee249ac2032521677dd74e31ede5429afbc0
> Author: Christian König <christian.koenig at amd.com>
> Date:   Wed Jan 13 14:02:04 2021 +0100
> 
>     drm/ttm: stop using GFP_TRANSHUGE_LIGHT
> 
> Namely, it removed the __GFP_NOWARN that we otherwise require.  I'll send 
> a patch in reply.
> 

Looks like Michel Dänzer <michel at daenzer.net> already sent a patch that 
should fix this:
https://lore.kernel.org/lkml/20210128095346.2421-1-michel@daenzer.net/