linux-kernel - Re: [PATCH 07/10] staging: erofs: separate into init

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Message-ID: <448b2d41-8156-3fe8-a037-29a31771721e@huawei.com>
Date:   Thu, 22 Nov 2018 20:00:21 +0800
From:   Gao Xiang <gaoxiang25@...wei.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     <devel@...verdev.osuosl.org>, <linux-erofs@...ts.ozlabs.org>,
        Chao Yu <yuchao0@...wei.com>,
        LKML <linux-kernel@...r.kernel.org>, <weidu.du@...wei.com>,
        Miao Xie <miaoxie@...wei.com>
Subject: Re: [PATCH 07/10] staging: erofs: separate into init_once / always

Hi Greg,

On 2018/11/22 19:26, Greg Kroah-Hartman wrote:
> Don't make people rebuild your code with different options for
> debugging.  That will never work in the 'real world' when people start
> using the code.  You need to have things enabled for people all the
> time, which is why we have dynamic debugging in the kernel now, and not
> a zillion different "DRIVER_DEBUG" build options anymore.

Actually, current erofs handle differently for beta users (in eng mode)
and commercial users.

CONFIG_EROFS_FS_DEBUG is enable for all beta users, after an observed
expression is false, we could get the whole memorydump as early as possible.
But for commercial users, there are no such observing points to promise
the kernel stability and performance.

It has helped us to find several bug, and I cannot find some alternative way
to get the the first scene of the accident...

Thanks,
Gao Xiang