Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Thu, 20 Feb 2020 14:55:35 -0500
From:   Daniel Jordan <daniel.m.jordan@oracle.com>
To:     Tejun Heo <tj@kernel.org>
Cc:     Daniel Jordan <daniel.m.jordan@oracle.com>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Michal Hocko <mhocko@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Roman Gushchin <guro@fb.com>, linux-mm@kvack.org,
        cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
        kernel-team@fb.com, Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH] mm: memcontrol: asynchronous reclaim for memory.high
Message-ID: <20200220195535.7xblt45akld6eftj@ca-dmjordan1.us.oracle.com>
References: <20200219181219.54356-1-hannes@cmpxchg.org>
 <20200219183731.GC11847@dhcp22.suse.cz>
 <20200219191618.GB54486@cmpxchg.org>
 <20200219195332.GE11847@dhcp22.suse.cz>
 <20200219214112.4kt573kyzbvmbvn3@ca-dmjordan1.us.oracle.com>
 <20200219220859.GF54486@cmpxchg.org>
 <20200220154524.dql3i5brnjjwecft@ca-dmjordan1.us.oracle.com>
 <20200220155651.GG698990@mtj.thefacebook.com>
 <20200220182326.ubcjycaubgykiy6e@ca-dmjordan1.us.oracle.com>
 <20200220184545.GH698990@mtj.thefacebook.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20200220184545.GH698990@mtj.thefacebook.com>
User-Agent: NeoMutt/20180716
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Thu, Feb 20, 2020 at 01:45:45PM -0500, Tejun Heo wrote:
> The setup cost can be lazy optimized but it'd still have to bounce the
> tiny pieces of work to different threads instead of processing them in
> one fell swoop from the same context, which most likely is gonna be
> untenably expensive.

I see, your last mail is clearer now.  If it's easy to do, a pointer to where
this happens would help so we're on the same page.

thanks,
Daniel