Re: [PATCH v2 0/2] mm/kasan: dump alloc/free stack for page allocator

[Vlastimil Babka]

On 9/10/19 12:50 PM, Andrey Ryabinin wrote:
> For slab objects we memorize both alloc and free stacks. You'll never know in advance what information will be usefull
> to fix an issue, so it usually better to provide more information. I don't think we should do anything different for pages.

Exactly, thanks.

> Given that we already have the page_owner responsible for providing alloc/free stacks for pages, all that we should in KASAN do is to
> enable the feature by default. Free stack saving should be decoupled from debug_pagealloc into separate option so that it can be enabled
> by KASAN and/or debug_pagealloc.

Right. Walter, can you do it that way, or should I?

Thanks,
Vlastimil