netdev - Re: [PATCH net: fix /proc/net/dev regression

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Date:	Tue, 03 Apr 2012 08:36:48 -0700
From:	Ben Greear <greearb@...delatech.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	David Miller <davem@...emloft.net>,
	NetDev <netdev@...r.kernel.org>,
	Mihai Maruseac <mmaruseac@...acom.com>
Subject: Re: [PATCH net: fix /proc/net/dev regression

On 04/03/2012 01:33 AM, Eric Dumazet wrote:
> Commit f04565ddf52 (dev: use name hash for dev_seq_ops) added a second
> regression, as some devices are missing from /proc/net/dev if many
> devices are defined.
>
> When seq_file buffer is filled, the last ->next/show() method is
> canceled (pos value is reverted to value prior ->next() call)
>
> Problem is after above commit, we dont restart the lookup at right
> position in ->start() method.
>
> Fix this by removing the internal 'pos' pointer added in commit, since
> we need to use the 'loff_t *pos' provided by seq_file layer.
>
> This also reverts commit 5cac98dd0 (net: Fix corruption
> in /proc/*/net/dev_mcast), since its not needed anymore.
>
> Reported-by: Ben Greear<greearb@...delatech.com>
> Signed-off-by: Eric Dumazet<eric.dumazet@...il.com>
> Cc: Mihai Maruseac<mmaruseac@...acom.com>

This appears to fix the problem.  I do find it mildly irritating
that the ordering is now random in /proc/net/dev, but I guess
that is the price of progress.

Tested-by:  Ben Greear <greearb@...delatech.com>

Thanks for the quick fix!

Ben

-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com

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