Re: [PATCH v7 0/8] Request for inclusion: tcp memory buffers

On Fri, 14 Oct 2011 00:05:58 +0400, Glauber Costa said:

On 10/14/2011 12:00 AM, David Miller wrote:

quoted

Make this evaluate into exactly the same exact code stream we have
now when the memory cgroup feature is not in use, which will be the
majority of users.

What exactly do you mean by "not in use" ? Not compiled in or not 
actively being exercised ? If you mean the later, I appreciate tips on 
how to achieve it.

Also, I kind of dispute the affirmation that !cgroup will encompass
the majority of users, since cgroups is being enabled by default by
most vendors. All systemd based systems use it extensively, for instance.

Yes, systemd requires a kernel that includes cgroups.  However, systemd does
*not* require the memory cgroup feature.  As a practical matter, if your patch
doesn't generate equivalent code for the "have cgroups, but no memory cgroup"
situation, it's a non-starter.