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Re: [PATCH v2] memcg: refactor mem_cgroup_resize_limit()

From Yu Zhao <yuzhao@google.com>
Newsgroups linux.kernel
Subject Re: [PATCH v2] memcg: refactor mem_cgroup_resize_limit()
Date 2017-06-04 22:40 +0200
Message-ID <tOKtA-1zy-13@gated-at.bofh.it> (permalink)
References <tNHo5-IM-1@gated-at.bofh.it> <tOK0x-1qd-3@gated-at.bofh.it> <tOKad-1to-3@gated-at.bofh.it>
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On Sun, Jun 04, 2017 at 11:09:42PM +0300, Vladimir Davydov wrote:
> On Sun, Jun 04, 2017 at 01:04:37PM -0700, Yu Zhao wrote:
> > @@ -2498,22 +2449,24 @@ static int mem_cgroup_resize_memsw_limit(struct mem_cgroup *memcg,
> >  		}
> >  
> >  		mutex_lock(&memcg_limit_mutex);
> > -		if (limit < memcg->memory.limit) {
> > +		inverted = memsw ? limit < memcg->memory.limit :
> > +				   limit > memcg->memsw.limit;
> > +		if (inverted)
> >  			mutex_unlock(&memcg_limit_mutex);
> >  			ret = -EINVAL;
> >  			break;
> >  		}
> 
> For some reason, I liked this patch more without this extra variable :-)
Well, I'll refrain myself from commenting more because we are now at
the risk of starting a coding style war over this.

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Thread

[PATCH] memcg: refactor mem_cgroup_resize_limit() Yu Zhao <yuzhao@google.com> - 2017-06-02 01:10 +0200
  Re: [PATCH] memcg: refactor mem_cgroup_resize_limit() Nikolay Borisov <n.borisov.lkml@gmail.com> - 2017-06-02 09:40 +0200
    Re: [PATCH] memcg: refactor mem_cgroup_resize_limit() Yu Zhao <yuzhao@google.com> - 2017-06-04 21:50 +0200
  Re: [PATCH] memcg: refactor mem_cgroup_resize_limit() Vladimir Davydov <vdavydov.dev@gmail.com> - 2017-06-03 17:20 +0200
  [PATCH v2] memcg: refactor mem_cgroup_resize_limit() Yu Zhao <yuzhao@google.com> - 2017-06-04 22:10 +0200
    Re: [PATCH v2] memcg: refactor mem_cgroup_resize_limit() Vladimir Davydov <vdavydov.dev@gmail.com> - 2017-06-04 22:20 +0200
      Re: [PATCH v2] memcg: refactor mem_cgroup_resize_limit() Yu Zhao <yuzhao@google.com> - 2017-06-04 22:40 +0200
  [PATCH v3] memcg: refactor mem_cgroup_resize_limit() Yu Zhao <yuzhao@google.com> - 2017-06-04 23:20 +0200

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