linux-kernel - Re: [rhashtable] [ INFO: suspicious RCU usage. ]

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Date:	Fri, 03 Apr 2015 15:09:51 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	tgraf@...g.ch
Cc:	herbert@...dor.apana.org.au, fengguang.wu@...el.com, lkp@...org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [rhashtable] [ INFO: suspicious RCU usage. ]

From: Thomas Graf <tgraf@...g.ch>
Date: Thu, 2 Apr 2015 08:33:56 +0100

> On 04/02/15 at 12:29pm, Herbert Xu wrote:
>> On Thu, Apr 02, 2015 at 12:11:35PM +0800, Fengguang Wu wrote:
>> > 
>> > Yes it is contained in next-20150401 which is bad:
>> > 
>> > # extra tests on tree/branch next/master
>> > git bisect  bad e954104e2b634b42811dad8d502cbf240f206df2  # 21:22      0-     60  Add linux-next specific files for 20150401
>> > 
>> > The dmesg there is
>> > 
>> > [    1.149409] test_firmware: interface ready
>> > [    1.150293] Running resizable hashtable tests...
>> > [    1.151209]   Adding 2048 keys
>> > [    1.152069] ------------[ cut here ]------------
>> > [    1.152978] WARNING: CPU: 0 PID: 1 at lib/rhashtable.c:409 rhashtable_insert_rehash+0x9d/0x1d0()
>> 
>> I see.  This is actually a completely different problem.
>> 
>> ---8<---
>> test_rhashtable: Remove bogus max_size setting
>> 
>> Now that resizing is completely automatic, we need to remove
>> the max_size setting or the test will fail.
>> 
>> Reported-by: Fengguang Wu <fengguang.wu@...el.com>
>> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
> 
> Acked-by: Thomas Graf <tgraf@...g.ch>
> 
> Had the same fix queued up in an upcoming series ;-)

Applied to net-next, thanks everyone.
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