linux-kernel - Re: [Patch] Remove debugfs entries on bad path

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Message-ID: <4A1207DE.4000409@cn.fujitsu.com>
Date:	Tue, 19 May 2009 09:14:06 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	raspl@...ux.vnet.ibm.com
CC:	linux-btrace@...r.kernel.org, Jens Axboe <jens.axboe@...cle.com>,
	linux-kernel@...r.kernel.org, schwidefsky@...ibm.com,
	heiko.carstens@...ibm.com
Subject: Re: [Patch] Remove debugfs entries on bad path

A better title:
	[Patch] blktrace: remove debugfs entries on bad path

Stefan Raspl wrote:
> debugfs directory entries for devices are not removed on bad path.

Can you be more elaborate on how to reproduce this issue?

> If so, subsequent attempts to start blktrace on the respective
> devices will not succeed due to existing directories.
> 
> Signed-off-by: Stefan Raspl <stefan.raspl@...ux.vnet.ibm.com>
> 
> ---
>  kernel/trace/blktrace.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> --- a/kernel/trace/blktrace.c
> +++ b/kernel/trace/blktrace.c
> @@ -262,6 +262,7 @@ static void blk_trace_free(struct blk_tr
>  {
>  	debugfs_remove(bt->msg_file);
>  	debugfs_remove(bt->dropped_file);
> +	debugfs_remove(bt->dir);
>  	relay_close(bt->rchan);
>  	free_percpu(bt->sequence);
>  	free_percpu(bt->msg_data);
> 

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