linux-kernel - Re: [PATCH] mm: mempolicy: use VM_BUG_ON_VMA in queue_pages_test

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Message-Id: <20200213212639.90c5eef95e4e3a4211dcf0a9@linux-foundation.org>
Date:   Thu, 13 Feb 2020 21:26:39 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Qian Cai <cai@....pw>
Cc:     Yang Shi <yang.shi@...ux.alibaba.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, "Li Xinhai" <lixinhai.lxh@...il.com>
Subject: Re: [PATCH] mm: mempolicy: use VM_BUG_ON_VMA in
 queue_pages_test_walk()

On Mon, 27 Jan 2020 15:23:08 -0500 Qian Cai <cai@....pw> wrote:

> 
> 
> > On Jan 27, 2020, at 2:57 PM, Yang Shi <yang.shi@...ux.alibaba.com> wrote:
> > 
> > Dumping more information to help debugging. I don't run into related bug personally.
> 
> This is a relatively weak justification for merging. If we are keeping accepting those mindless debugging patches, the workload will be unbearable for all.

I think it's OK.  If this ever triggers the kernel is dead, so the
volume of output isn't a problem.  And if it triggers, the more info
the better.