netdev - Re: [BUG] act_ife: sleeping functions called in atomic context

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Message-ID: <5763D970.3030504@ispras.ru>
Date:	Fri, 17 Jun 2016 14:05:20 +0300
From:	Alexey Khoroshilov <khoroshilov@...ras.ru>
To:	Cong Wang <xiyou.wangcong@...il.com>,
	Jamal Hadi Salim <jhs@...atatu.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>, ldv-project@...uxtesting.org
Subject: Re: [BUG] act_ife: sleeping functions called in atomic context

On 17.06.2016 08:38, Cong Wang wrote:
> On Thu, Jun 16, 2016 at 7:14 PM, Cong Wang <xiyou.wangcong@...il.com> wrote:
>>
>> I think we can just remove that tcf_lock, I am testing a patch now.
> 
> Please try the attached patch, I will do more tests tomorrow.
> 
> Thanks!
> 

Looks good with two notes:
1. add_metainfo() still contains
ret = ops->alloc(mi, metaval);
that allocates memory with GFP_KERNEL.
So, I would add gfpflag argument to alloc() operation.

2. It makes sense to mention ife_mod_lock in the comment before
add_metainfo(), because ife_mod_lock is the reason to use GFP_ATOMIC there.

--
Alexey