linux-kernel - Re: [PATCH v2] fix printk output

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Message-ID: <1386660574.7152.203.camel@host5.omatika.ru>
Date:	Tue, 10 Dec 2013 11:29:34 +0400
From:	Sergei Ianovich <ynvich@...il.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	linux-kernel@...r.kernel.org,
	Hannes Frederic Sowa <hannes@...essinduktion.org>
Subject: Re: [PATCH v2] fix printk output

On Tue, 2013-12-10 at 15:59 +1030, Rusty Russell wrote:
> Sergei Ianovich <ynvich@...il.com> writes:
> Hmm, the copy here is gratuitous.  Using current->comm is safe, just
> possibly ambigious if someone is changing the task name at the same time.
> 
> And we really want this one line anyway:
> 
>   		printk(KERN_WARNING
>  		       "%s: waiting module removal not supported: please upgrade\n",
>                         current->comm);

I would put tool's name in the end for clarity. Message comes from the
kernel and the kernel recommends to upgrade the tool. "%s: ..." could
make the impression that the tool recommends to upgrade the kernel.

> BTW, did you actually hit this?

# modprobe usb_storage
[  600.807274] usbcore: registered new interface driver usb-storage
# modprobe -r usb_storage
[  604.216318] waiting module removal not supported: please upgrade[
604.222164] usbcore: deregistering interface driver usb-storage
# modprobe -V
kmod version 9

I am using the latest kmod package from emdebian unstable-grip.

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