lkml.org 
[lkml]   [2015]   [May]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/2] gfp: add __GFP_NOACCOUNT
On Wed, May 06, 2015 at 01:59:41PM +0200, Michal Hocko wrote:
> On Tue 05-05-15 12:45:42, Vladimir Davydov wrote:
> > Not all kmem allocations should be accounted to memcg. The following
> > patch gives an example when accounting of a certain type of allocations
> > to memcg can effectively result in a memory leak.
>
> > This patch adds the __GFP_NOACCOUNT flag which if passed to kmalloc
> > and friends will force the allocation to go through the root
> > cgroup. It will be used by the next patch.
>
> The name of the flag is way too generic. It is not clear that the
> accounting is KMEMCG related.

The memory controller is the (primary) component that accounts
physical memory allocations in the kernel, so I don't see how this
would be ambiguous in any way.

> __GFP_NO_KMEMCG sounds better?

I think that's much worse. I would prefer communicating the desired
behavior directly instead of having to derive it from a subsystem
name.

(And KMEMCG should not even be a term, it's all just the memory
controller, i.e. memcg.)


\
 
 \ /
  Last update: 2015-05-06 16:01    [W:0.095 / U:0.228 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site