linux-kernel - Re: [PATCH] mm/zsmalloc: add log for module load/unload

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Date:	Tue, 27 Jan 2015 10:07:53 +0800
From:	Ganesh Mahendran <opensource.ganesh@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Minchan Kim <minchan@...nel.org>, Nitin Gupta <ngupta@...are.org>,
	Linux-MM <linux-mm@...ck.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm/zsmalloc: add log for module load/unload

Hello, Andrew

2015-01-27 7:19 GMT+08:00 Andrew Morton <akpm@...ux-foundation.org>:
> On Sat, 24 Jan 2015 21:48:41 +0800 Ganesh Mahendran <opensource.ganesh@...il.com> wrote:
>
>> Sometimes, we want to know whether a module is loaded or unloaded
>> from the log.
>
> Why?  What's special about zsmalloc?
>
> Please provide much better justification than this.

When I debug with the zsmalloc module built in kernel.
After system boots up, I did not see:
/sys/kernel/debug/zsmalloc dir.

Although the reason for this is that I made a mistake. I
forgot to add debugfs entry in /etc/fstab.
But I think it is suitable to add information for a module load/unload.
Then we can get this by:
dmesg | grep zsmalloc.

Thanks.
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