linux-kernel - Re: [PATCH] mm/memcontrol: use kstrtobool for swapaccount param parsing

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Message-ID: <YxrtODqHhdEkW2Lx@dhcp22.suse.cz>
Date:   Fri, 9 Sep 2022 09:37:28 +0200
From:   Michal Hocko <mhocko@...e.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Liu Shixin <liushixin2@...wei.com>,
        Jonathan Corbet <corbet@....net>,
        Johannes Weiner <hannes@...xchg.org>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Shakeel Butt <shakeelb@...gle.com>,
        Muchun Song <songmuchun@...edance.com>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        cgroups@...r.kernel.org, linux-mm@...ck.org,
        Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: Re: [PATCH] mm/memcontrol: use kstrtobool for swapaccount param
 parsing

On Thu 08-09-22 15:02:48, Andrew Morton wrote:
> On Thu, 8 Sep 2022 16:34:52 +0800 Liu Shixin <liushixin2@...wei.com> wrote:
> 
> > --- a/mm/swap_cgroup.c
> > +++ b/mm/swap_cgroup.c
> > @@ -194,7 +194,7 @@ int swap_cgroup_swapon(int type, unsigned long max_pages)
> >  	return 0;
> >  nomem:
> >  	pr_info("couldn't allocate enough memory for swap_cgroup\n");
> > -	pr_info("swap_cgroup can be disabled by swapaccount=0 boot option\n");
> > +	pr_info("swap_cgroup can be disabled by swapaccount=[oO][Ff]/N/n/0 boot option\n");
> 
> I'm not sure this really needed changing.  "=0" was OK and the message
> now looks rather silly.

Agreed. While swapaccount=0 is clear the extended form, even if correct,
might just confuse some admins.

-- 
Michal Hocko
SUSE Labs