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Re: [PATCH] mm: memcontrol: only manage socket pressure for CONFIG_INET

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On Wed, 9 Dec 2015 13:58:58 -0500 Johannes Weiner <hannes@cmpxchg.org> wrote:

> > diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> > index 6faea81e66d7..73cd572167bb 100644
> > --- a/mm/memcontrol.c
> > +++ b/mm/memcontrol.c
> > @@ -4220,13 +4220,13 @@ mem_cgroup_css_online(struct cgroup_subsys_state *css)
> >  	if (ret)
> >  		return ret;
> >  
> > +#ifdef CONFIG_INET
> >  #ifdef CONFIG_MEMCG_LEGACY_KMEM
> >  	ret = tcp_init_cgroup(memcg);
> >  	if (ret)
> >  		return ret;
> >  #endif
> 
> The calls to tcp_init_cgroup() appear earlier in the series than "mm:
> memcontrol: hook up vmpressure to socket pressure". However, they get
> moved around a few times so fixing it earlier means respinning the
> series. Andrew, it's up to you whether we take the bisectability hit
> for !CONFIG_INET && CONFIG_MEMCG (how common is this?) or whether you
> want me to resend the series.

hm, drat, I was suspecting dependency issues here, but a test build
said it was OK.

Actually, I was expecting this patch series to depend on the linux-next
cgroup2 changes, but that doesn't appear to be the case.  *should* this
series be staged after the cgroup2 code?

Regarding this particular series: yes, I think we can live with a
bisection hole for !CONFIG_INET && CONFIG_MEMCG users.  But I'm not
sure why we're discussing bisection issues, because Arnd's build
failure occurs with everything applied?

> Sorry about the trouble. I don't have a git tree on kernel.org because
> we don't really use git in -mm, but the downside is that we don't get
> the benefits of the automatic build testing for all kinds of configs.
> I'll try to set up a git tree to expose series to full build coverage
> before they hit -mm and -next.

This sort of thing happens quite rarely.
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[PATCH 00/14] mm: memcontrol: account socket memory in unified hierarchy v4-RESEND Johannes Weiner <hannes@cmpxchg.org> - 2015-12-08 16:40 +0100
  [PATCH 01/14] mm: memcontrol: export root_mem_cgroup Johannes Weiner <hannes@cmpxchg.org> - 2015-12-08 16:40 +0100
  [PATCH 06/14] net: tcp_memcontrol: simplify the per-memcg limit access Johannes Weiner <hannes@cmpxchg.org> - 2015-12-08 16:40 +0100
  [PATCH 09/14] mm: memcontrol: generalize the socket accounting jump label Johannes Weiner <hannes@cmpxchg.org> - 2015-12-08 16:40 +0100
  [PATCH 05/14] net: tcp_memcontrol: remove dead per-memcg count of allocated sockets Johannes Weiner <hannes@cmpxchg.org> - 2015-12-08 16:40 +0100
  [PATCH 02/14] net: tcp_memcontrol: properly detect ancestor socket pressure Johannes Weiner <hannes@cmpxchg.org> - 2015-12-08 16:40 +0100
  [PATCH 08/14] net: tcp_memcontrol: simplify linkage between socket and page counter Johannes Weiner <hannes@cmpxchg.org> - 2015-12-08 16:40 +0100
  [PATCH 04/14] net: tcp_memcontrol: protect all tcp_memcontrol calls by jump-label Johannes Weiner <hannes@cmpxchg.org> - 2015-12-08 16:40 +0100
  [PATCH 11/14] mm: memcontrol: move socket code for unified hierarchy accounting Johannes Weiner <hannes@cmpxchg.org> - 2015-12-08 16:40 +0100
  [PATCH 13/14] mm: memcontrol: hook up vmpressure to socket pressure Johannes Weiner <hannes@cmpxchg.org> - 2015-12-08 16:40 +0100
  Re: [PATCH 00/14] mm: memcontrol: account socket memory in unified  hierarchy v4-RESEND David Miller <davem@davemloft.net> - 2015-12-08 17:30 +0100
  [PATCH] mm: memcontrol: only manage socket pressure for CONFIG_INET Arnd Bergmann <arnd@arndb.de> - 2015-12-09 17:40 +0100
    Re: [PATCH] mm: memcontrol: only manage socket pressure for  CONFIG_INET Johannes Weiner <hannes@cmpxchg.org> - 2015-12-09 20:00 +0100
      Re: [PATCH] mm: memcontrol: only manage socket pressure for  CONFIG_INET Andrew Morton <akpm@linux-foundation.org> - 2015-12-09 23:30 +0100
        Re: [PATCH] mm: memcontrol: only manage socket pressure for  CONFIG_INET Johannes Weiner <hannes@cmpxchg.org> - 2015-12-10 00:10 +0100
          Re: [PATCH] mm: memcontrol: only manage socket pressure for  CONFIG_INET Andrew Morton <akpm@linux-foundation.org> - 2015-12-10 00:20 +0100
  [PATCH] mm: memcontrol: MEMCG no longer works with SLOB Arnd Bergmann <arnd@arndb.de> - 2015-12-09 17:40 +0100
    Re: [PATCH] mm: memcontrol: MEMCG no longer works with SLOB Johannes Weiner <hannes@cmpxchg.org> - 2015-12-09 21:10 +0100
      Re: [PATCH] mm: memcontrol: MEMCG no longer works with SLOB Arnd Bergmann <arnd@arndb.de> - 2015-12-09 22:10 +0100
      Re: [PATCH] mm: memcontrol: MEMCG no longer works with SLOB Vladimir Davydov <vdavydov@virtuozzo.com> - 2015-12-10 12:30 +0100
  Re: [PATCH 00/14] mm: memcontrol: account socket memory in unified hierarchy v4-RESEND Arnd Bergmann <arnd@arndb.de> - 2015-12-09 17:40 +0100
    Re: [PATCH 00/14] mm: memcontrol: account socket memory in unified  hierarchy v4-RESEND Johannes Weiner <hannes@cmpxchg.org> - 2015-12-09 19:20 +0100

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