Re: [PATCH v1] thermal/core: change mm alloc method to avoid kernel warning

[Daniel Lezcano]

On 19/04/2022 10:48, Zhang Rui wrote:
> On Sun, 2022-04-17 at 12:56 +0000, Junwen Wu wrote:
> > Very high cooling device max state value makes cooling device stats
> > buffer allocation fails,like below.Using kzvalloc instead of kzalloc
> > can avoid this issue.
>
> When a cooling device has big max_state, this patch can get ride of the
> warning here, but still we end up with the read failure of the
> trans_table in sysfs because it is larger than PAGE_SIZE.
>
> $ cat /sys/class/thermal/cooling_device8/stats/trans_table
> cat: /sys/class/thermal/cooling_device8/stats/trans_table: File too
> large
>
> IMO, unless we can fix both places, I'd suggest we skip allocating and
> creating the broken trans_table attr. Like a prototype patch below

Why not create a thermal debugfs with real useful information and get 
rid of this broken code ?

I've some prototype code I can respin to RFC



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