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Date:	Thu, 7 Aug 2014 21:42:46 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Oleg Drokin <green@...uxhacker.ru>
Cc:	Evgeny Budilovsky <budevg@...il.com>, devel@...verdev.osuosl.org,
	Andreas Dilger <andreas.dilger@...el.com>,
	Peng Tao <bergwolf@...il.com>, linux-kernel@...r.kernel.org,
	Lai Siyao <lai.siyao@...el.com>
Subject: Re: [PATCH] staging/lustre: use rcu_dereference to access rcu
 protected current->real_parent field

On Fri, Aug 08, 2014 at 12:03:20AM -0400, Oleg Drokin wrote:
> Hello!
> 
> On Aug 7, 2014, at 11:49 PM, Greg Kroah-Hartman wrote:
> >> 
> >> This is not a critical bug and in the worst case the code here may
> >> cause miss of statistics counter increase.
> >> This is why I think it is not worth to backport the patch at all.
> > You are right, and if this is just for some random "statistics" file,
> > can we just delete the whole function?
> 
> I hope not!
> This is used all around the client to tally up various operations executed counts.

Why would you do that?  Why would they care?

> The statistic is then used by various userspace monitoring tools.

Why not use the in-kernel monitoring tools instead of creating your own?
What does userspace do with that information?

thanks,

greg k-h
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