From: Patrick McHardy <kaber@trash.net>
To: Stephen Hemminger <shemminger@vyatta.com>
Cc: Ben Greear <greearb@candelatech.com>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
Linux Netdev List <netdev@vger.kernel.org>,
"David S. Miller" <davem@davemloft.net>
Subject: Re: IPv4/IPv6 sysctl unregistration deadlock
Date: Mon, 02 Mar 2009 12:07:11 +0100 [thread overview]
Message-ID: <49ABBDDF.4030805@trash.net> (raw)
In-Reply-To: <20090227103812.14af52b3@nehalam>
Stephen Hemminger wrote:
> On Fri, 27 Feb 2009 10:26:43 -0800
> Ben Greear <greearb@candelatech.com> wrote:
>
>> Stephen Hemminger wrote:
>>
>>> Subject: [PATCH] Avoid race between network down and sysfs
>>>
>>>
>>> Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
>>>
>>> --- a/net/core/net-sysfs.c 2009-02-26 08:36:18.000000000 -0800
>>> +++ b/net/core/net-sysfs.c 2009-02-26 08:37:51.000000000 -0800
>>> @@ -77,7 +77,9 @@ static ssize_t netdev_store(struct devic
>>> if (endp == buf)
>>> goto err;
>>>
>>> - rtnl_lock();
>>> + if (!rtnl_trylock())
>>> + return -ERESTARTSYS;
>>> +
>>> if (dev_isalive(net)) {
>>> if ((ret = (*set)(net, new)) == 0)
>>> ret = len;
>> I can test this to see if it fixes my problem. Are the above lines the
>> entirety of the patch?
>
> yes
We should be able to avoid the restart looping in most cases,
we only need to do this while unregistration is in progress.
next prev parent reply other threads:[~2009-03-02 11:07 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-25 5:23 IPv4/IPv6 sysctl unregistration deadlock Patrick McHardy
2009-02-25 6:19 ` Herbert Xu
2009-02-25 6:23 ` Patrick McHardy
2009-02-25 7:18 ` Patrick McHardy
2009-02-25 8:43 ` Herbert Xu
2009-02-26 6:06 ` Eric W. Biederman
2009-02-26 6:10 ` Eric W. Biederman
2009-02-26 6:22 ` Herbert Xu
2009-02-26 7:18 ` Eric W. Biederman
2009-02-26 16:49 ` Stephen Hemminger
2009-02-26 19:01 ` Eric W. Biederman
2009-02-26 20:24 ` Stephen Hemminger
2009-02-27 0:59 ` Herbert Xu
2009-02-27 1:25 ` Stephen Hemminger
2009-02-27 18:26 ` Ben Greear
2009-02-27 18:38 ` Stephen Hemminger
2009-03-02 11:07 ` Patrick McHardy [this message]
2009-03-02 11:21 ` Patrick McHardy
2009-03-02 22:11 ` Ben Greear
2009-03-02 22:20 ` Patrick McHardy
2009-03-02 22:47 ` David Miller
2009-03-02 23:03 ` Patrick McHardy
2009-03-03 8:48 ` David Miller
2009-03-08 3:36 ` Eric W. Biederman
2009-02-26 16:55 ` Stephen Hemminger
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