From: David Miller <davem@davemloft.net>
To: brian.haley@hp.com
Cc: eric.dumazet@gmail.com, davej@redhat.com, netdev@vger.kernel.org
Subject: Re: sock_ioctl sleeping while atomic warning during boot.
Date: Fri, 21 Dec 2012 13:15:04 -0800 (PST) [thread overview]
Message-ID: <20121221.131504.402952074906485532.davem@davemloft.net> (raw)
In-Reply-To: <50D3D7F7.2030200@hp.com>
From: Brian Haley <brian.haley@hp.com>
Date: Thu, 20 Dec 2012 22:31:03 -0500
> On 12/20/2012 10:25 PM, Eric Dumazet wrote:
>> OK, thanks for the report.
>>
>> We need a seqcount, not a seqlock, as RTNL already protects multiple
>> writers.
>>
>> Please try following fix :
>>
>>
>> [PATCH] net: devnet_rename_seq should be a seqcount
>>
>> Using a seqlock for devnet_rename_seq is not a good idea,
>> as device_rename() can sleep.
>>
>> As we hold RTNL, we dont need a protection for writers,
>> and only need a seqcount so that readers can catch a change done
>> by a writer.
>>
>> Bug added in commit c91f6df2db4972d3 (sockopt: Change getsockopt() of
>> SO_BINDTODEVICE to return an interface name)
>>
>> Reported-by: Dave Jones <davej@redhat.com>
>> Signed-off-by: Eric Dumazet <edumazet@google.com>
>> Cc: Brian Haley <brian.haley@hp.com>
>
> Sorry about that, thanks for the quick fix Eric.
Applied.
prev parent reply other threads:[~2012-12-21 21:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-21 2:24 sock_ioctl sleeping while atomic warning during boot Dave Jones
2012-12-21 3:25 ` Eric Dumazet
2012-12-21 3:31 ` Brian Haley
2012-12-21 21:15 ` David Miller [this message]
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