netdev - Re: [PATCH net v4 0/2] rhashtable: Fix rhltable duplicates insertion

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Date:   Wed, 07 Mar 2018 11:23:42 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     paulb@...lanox.com
Cc:     tgraf@...g.ch, herbert@...dor.apana.org.au, netdev@...r.kernel.org,
        kliteyn@...lanox.com, roid@...lanox.com, shahark@...lanox.com,
        markb@...lanox.com, jiri@...lanox.com, ogerlitz@...lanox.com,
        matanb@...lanox.com
Subject: Re: [PATCH net v4 0/2] rhashtable: Fix rhltable duplicates
 insertion

From: Paul Blakey <paulb@...lanox.com>
Date: Wed,  7 Mar 2018 16:00:11 +0200

> On our mlx5 driver fs_core.c, we use the rhltable interface to store
> flow groups. We noticed that sometimes we get a warning that flow group isn't
> found at removal. This rare case was caused when a specific scenario happened,
> insertion of a flow group with a similar match criteria (a duplicate),
> but only where the flow group rhash_head was second (or not first)
> on the relevant rhashtable bucket list.
> 
> The first patch fixes it, and the second one adds a test that show
> it is now working.
> 
> Paul.
> 
> v4 --> v3 changes:
>     * Added Herbert Xu's ack (thanks)
>     * Removed extra commit tags

I already applied v3, sorry.  But I did add Herbert's ACKs.
:-)