Re: + page-owner-tracking.patch added to -mm tree

[Ingo Molnar <mingo@elte.hu>]

* Pekka Enberg <penberg@cs.helsinki.fi> wrote:

> Ingo Molnar wrote:
>> * Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> wrote:
>>
>>> One thing I'm not sure about this patch is whether it manages to  
>>> record an allocation only once, i.e. does it log a single event  
>>> when/if the slab allocator requests pages? Some time ago I sent a  
>>> patch adding GFP_NOTRACE to gfp.h, but was rejected. Maybe this  
>>> could be a way out of the mess.
>>>
>>> (GFP_NOTRACE would also allow us to log "backend" allocations easily 
>>> and treat them separately, for the record, or simply filter them 
>>> out.)
>>
>> makes a lot of sense IMO to annotate these via a GFP flag.
>
> Yup, make sense. I think I rejected the patch (did I?) because I 
> wanted to fix the slub/slab mess differently but here it makes 
> perfect sense.

I'm wondering how much could be shared with the kmemcheck's 
internal-allocation annotations. There's some overlap (although not 
a full match) i suspect?

	Ingo