Re: [PATCH] mm/slub: use stackdepot to save stack trace in objects

[Andrew Morton]

On Wed, 14 Apr 2021 18:34:34 +0200 glittao@xxxxxxxxx wrote:

> Many stack traces are similar so there are many similar arrays.
> Stackdepot saves each unique stack only once.
> 
> Replace field addrs in struct track with depot_stack_handle_t handle.
> Use stackdepot to save stack trace.
> 
> The benefits are smaller memory overhead and possibility to aggregate
> per-cache statistics in the future using the stackdepot handle
> instead of matching stacks manually.

Which tree was this prepared against?  5.12's kmem_obj_info() is
significantly different from the version you were working on.

Please take a look, redo, retest and resend?  Thanks.