Re: [stable] [PATCH] Make swap accounting default behavior configurable

Greg KH
2010-11-16T21:22:25Z

On Tue, Nov 16, 2010 at 12:46:15PM -0800, Andrew Morton wrote:
> On Tue, 16 Nov 2010 11:17:26 +0100
> Michal Hocko <mhocko@suse.cz> wrote:
>
> > Hi Andrew,
> > could you consider the following patch for the Linus tree, please?
> > The discussion took place in this email thread
> > http://lkml.org/lkml/2010/11/10/114.
> > The patch is based on top of 151f52f09c572 commit in the Linus tree.
> >
> > Please let me know if there I should route this patch through somebody
> > else.
> >
> > Thanks!
> >
> > ---
> > >From 30238aaec758988493af793939f14b0ba83dc4b3 Mon Sep 17 00:00:00 2001
> > From: Michal Hocko <mhocko@suse.cz>
> > Date: Wed, 10 Nov 2010 13:30:04 +0100
> > Subject: [PATCH] Make swap accounting default behavior configurable
> >
> > Swap accounting can be configured by CONFIG_CGROUP_MEM_RES_CTLR_SWAP
> > configuration option and then it is turned on by default. There is
> > a boot option (noswapaccount) which can disable this feature.
> >
> > This makes it hard for distributors to enable the configuration option
> > as this feature leads to a bigger memory consumption and this is a no-go
> > for general purpose distribution kernel. On the other hand swap
> > accounting may be very usuful for some workloads.
>
> This patch is needed by distros, and distros use the -stable tree, I
> assume. Do you see reasons why this patch should be backported into
> -stable, so distros don't need to patch it themselves? If so, any
> particular kernel versions? 2.6.37?

Sorry, I really don't want to start backporting features to stable
kernels if at all possible. Distros can pick them up on their own if
they determine it is needed.

thanks,

greg k-h