netdev - rhashtable: how to deal with that rhashtable_lookup_insert

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Message-ID: <CADvbK_drKzCbByS38==rkC8yRtQhRj6mOtKAgXeHLwOhdh6Z1Q@mail.gmail.com>
Date:	Fri, 20 Nov 2015 13:14:18 +0800
From:	Xin Long <lucien.xin@...il.com>
To:	linux-kernel@...r.kernel.org, network dev <netdev@...r.kernel.org>
Cc:	tgraf@...g.ch, herbert@...dor.apana.org.au,
	davem <davem@...emloft.net>
Subject: rhashtable: how to deal with that rhashtable_lookup_insert_key return -EBUSY

when I use rhashtable_lookup_insert_key, sometimes it will return -EBUSY.
im not sure if there is a good way to workabout it.
or I should just try again and again until it's inserted successfully ?

I have seen some use in kernel  by now, but it seems that no one consider
this issue for their cases. but it indeed exists in my case.

did I use it incorrectly or something else ?

Thanks.
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