linux-kernel - Re: [PATCH 5/8] mm: memcontrol: account socket memory on unified hierarchy

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Message-ID: <20151106132940.GK4390@dhcp22.suse.cz>
Date:	Fri, 6 Nov 2015 14:29:40 +0100
From:	Michal Hocko <mhocko@...nel.org>
To:	Vladimir Davydov <vdavydov@...tuozzo.com>
Cc:	Johannes Weiner <hannes@...xchg.org>,
	David Miller <davem@...emloft.net>, akpm@...ux-foundation.org,
	tj@...nel.org, netdev@...r.kernel.org, linux-mm@...ck.org,
	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/8] mm: memcontrol: account socket memory on unified
 hierarchy

On Fri 06-11-15 12:05:55, Vladimir Davydov wrote:
[...]
> If there are no objections, I'll prepare a patch switching to the
> white-list approach. Let's start from obvious things like fs_struct,
> mm_struct, task_struct, signal_struct, dentry, inode, which can be
> easily allocated from user space.

pipe buffers, kernel stacks and who knows what more.

> This should cover 90% of all
> allocations that should be accounted AFAICS. The rest will be added
> later if necessarily.

The more I think about that the more I am convinced that is the only
sane way forward. The only concerns I would have is how do we deal with
the old interface in cgroup1? We do not want to break existing
deployments which might depend on the current behavior. I doubt they are
but...
-- 
Michal Hocko
SUSE Labs
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