linux-kernel - Re: [PATCH v2] mm/page_isolation: fix a deadlock with printk()

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Message-ID: <20191008093339.7092313b@gandalf.local.home>
Date:   Tue, 8 Oct 2019 09:33:39 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Qian Cai <cai@....pw>
Cc:     Petr Mladek <pmladek@...e.com>, Michal Hocko <mhocko@...nel.org>,
        sergey.senozhatsky.work@...il.com, peterz@...radead.org,
        linux-mm@...ck.org, john.ogness@...utronix.de,
        akpm@...ux-foundation.org, david@...hat.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mm/page_isolation: fix a deadlock with printk()

On Tue, 08 Oct 2019 09:23:52 -0400
Qian Cai <cai@....pw> wrote:

> I feel like that is what I trying to do, but there seems a lot of resistances
> with that approach where pragmatism met with perfectionism.

It's the way it came across. It sounded as if you were proposing
"the solution". I'm coming out and explicitly saying that this may be a
"temporary solution", as having "printk_deferred()" we can easily
remove them when that becomes the default operation.

-- Steve