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Date:   Tue, 28 Jun 2022 11:16:48 +0200
From:   Michal =?iso-8859-1?Q?Koutn=FD?= <mkoutny@suse.com>
To:     Vasily Averin <vvs@openvz.org>
Cc:     Roman Gushchin <roman.gushchin@linux.dev>,
        Shakeel Butt <shakeelb@google.com>,
        Michal Hocko <mhocko@suse.com>, Tejun Heo <tj@kernel.org>,
        Zefan Li <lizefan.x@bytedance.com>,
        Johannes Weiner <hannes@cmpxchg.org>, kernel@openvz.org,
        linux-kernel@vger.kernel.org,
        Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org,
        Vlastimil Babka <vbabka@suse.cz>,
        Muchun Song <songmuchun@bytedance.com>, cgroups@vger.kernel.org
Subject: Re: [PATCH cgroup] cgroup: set the correct return code if hierarchy
 limits are reached
Message-ID: <20220628091648.GA12249@blackbody.suse.cz>
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On Tue, Jun 28, 2022 at 06:59:06AM +0300, Vasily Averin <vvs@openvz.org> wrote:
> I would agree with you, however in my opinion EAGAIN is used to restart an
> interrupted system call. Thus, I worry its return can loop the user space without
> any chance of continuation.
> 
> However, maybe I'm confusing something?

The mkdir(2) manpage doesn't list EAGAIN at all. ENOSPC makes better
sense here. (And I suspect the dependency on this particular value won't
be very wide spread.)

0.02€
Michal