linux-kernel - Re: [PATCH] kernfs: make kernfs_walk_ns() use kernfs_pr_cont

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Message-ID: <20160115220521.GA8722@kroah.com>
Date:	Fri, 15 Jan 2016 14:05:21 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Tejun Heo <tj@...nel.org>
Cc:	Geert Uytterhoeven <geert@...ux-m68k.org>,
	"David S. Miller" <davem@...emloft.net>, pablo@...filter.org,
	Patrick McHardy <kaber@...sh.net>, kadlec@...ckhole.kfki.hu,
	Daniel Borkmann <daniel@...earbox.net>,
	daniel.wagner@...-carit.de, nhorman@...driver.com,
	Zefan Li <lizefan@...wei.com>,
	Johannes Weiner <hannes@...xchg.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	netfilter-devel@...r.kernel.org, coreteam@...filter.org,
	cgroups@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	kernel-team@...com, ninasc@...com,
	Josh Triplett <josh@...htriplett.org>
Subject: Re: [PATCH] kernfs: make kernfs_walk_ns() use kernfs_pr_cont_buf[]

On Fri, Jan 15, 2016 at 12:30:14PM -0500, Tejun Heo wrote:
> kernfs_walk_ns() uses a static path_buf[PATH_MAX] to separate out path
> components.  Keeping around the 4k buffer just for kernfs_walk_ns() is
> wasteful.  This patch makes it piggyback on kernfs_pr_cont_buf[]
> instead.  This requires kernfs_walk_ns() to hold kernfs_rename_lock.
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>
> Reported-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> ---
> Hello,
> 
> Greg, can you please route this one?

Thanks, will take this after 4.5-rc1 is out.

greg k-h