linux-kernel - Re: [PATCH AUTOSEL for 4.14 015/161] printk: Add console owner and waiter logic to load balance console writes

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Message-ID: <20180416163107.GC2341@sasha-vm>
Date:   Mon, 16 Apr 2018 16:31:09 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     Steven Rostedt <rostedt@...dmis.org>
CC:     Pavel Machek <pavel@....cz>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Petr Mladek <pmladek@...e.com>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Mel Gorman <mgorman@...e.de>, Michal Hocko <mhocko@...nel.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Peter Zijlstra <peterz@...radead.org>, Jan Kara <jack@...e.cz>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Byungchul Park <byungchul.park@....com>,
        Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH AUTOSEL for 4.14 015/161] printk: Add console owner and
 waiter logic to load balance console writes

On Mon, Apr 16, 2018 at 12:22:44PM -0400, Steven Rostedt wrote:
>On Mon, 16 Apr 2018 16:14:15 +0000
>Sasha Levin <Alexander.Levin@...rosoft.com> wrote:
>
>> Since the rate we're seeing now with AUTOSEL is similar to what we were
>> seeing before AUTOSEL, what's the problem it's causing?
>
>Does that mean we just doubled the rate of regressions? That's the
>problem.

No, the rate stayed the same :)

If before ~2% of stable commits were buggy, this is still the case with
AUTOSEL.

>>
>> How do you know if a bug bothers someone?
>>
>> If a user is annoyed by a LED issue, is he expected to triage the bug,
>> report it on LKML and patiently wait for the appropriate patch to be
>> backported?
>
>Yes.

I'm honestly not sure how to respond.

Let me ask my wife (who is happy using Linux as a regular desktop user)
how comfortable she would be with triaging kernel bugs...