linux-kernel - Re: [PATCH v2] mm: introduce memory.min

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Message-ID: <20180502125234.GA4025@castle.DHCP.thefacebook.com>
Date:   Wed, 2 May 2018 13:52:39 +0100
From:   Roman Gushchin <guro@...com>
To:     Johannes Weiner <hannes@...xchg.org>
CC:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        <cgroups@...r.kernel.org>, <kernel-team@...com>,
        Michal Hocko <mhocko@...e.com>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH v2] mm: introduce memory.min

On Wed, May 02, 2018 at 08:30:40AM -0400, Johannes Weiner wrote:
> On Mon, Apr 23, 2018 at 01:36:10PM +0100, Roman Gushchin wrote:
> > @@ -59,6 +59,12 @@ enum memcg_memory_event {
> >  	MEMCG_NR_MEMORY_EVENTS,
> >  };
> >  
> > +enum mem_cgroup_protection {
> > +	MEMCG_PROT_NONE,
> > +	MEMCG_PROT_LOW,
> > +	MEMCG_PROT_HIGH,
> 
> Ha, HIGH doesn't make much sense, but I went back and it's indeed what
> I suggested. Must have been a brainfart. This should be
> 
> MEMCG_PROT_NONE,
> MEMCG_PROT_LOW,
> MEMCG_PROT_MIN
> 
> right? To indicate which type of protection is applying.

Hm, I wasn't actually sure if it was a typo or not :)

But I thought that MEMCG_PROT_HIGH means a higher level
of protection than MEMCG_PROT_LOW, which sounds reasonable.

So, I'm fine with either option.

> 
> The rest of the patch looks good:
> 
> Acked-by: Johannes Weiner <hannes@...xchg.org>
> 

Thanks!

Can you, also, please, take a look at this one:
https://lkml.org/lkml/2018/4/24/703.

Thank you!