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From: Patrick McHardy <kaber@trash.net>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: netdev@vger.kernel.org, bugme-daemon@bugzilla.kernel.org,
	devzero@web.de, Robert Olsson <robert.olsson@its.uu.se>,
	"Denis V. Lunev" <den@openvz.org>
Subject: Re: [Bugme-new] [Bug 10737] New: pktgen procfs problem
Date: Sun, 18 May 2008 14:06:56 +0200	[thread overview]
Message-ID: <48301BE0.9040907@trash.net> (raw)
In-Reply-To: <20080517215641.acb94677.akpm@linux-foundation.org>

Andrew Morton wrote:
> On Sun, 18 May 2008 03:39:42 +0200 Patrick McHardy <kaber@trash.net> wrote:
>
>   
>> I've been looking into the same problem, without much success so
>> far. The problem appears to affect any /proc/net file, but not
>> files outside of /proc/net, so I'm guessing its net-ns related.
>> A testcase found by Ben Greear is opening the file multiple times:
>>
>> # /tmp/open /proc/net/kpktgen_0
>>
>> => refcnt goes to 1
>>
>> ^C
>>
>> => refcnt goes to 0
>>
>> Without ^C and opening the file a second time:
>>
>> # /tmp/open /proc/net/kpktgen_0
>>
>> => refcnt goes to 2 (sometimes also 11)
>>
>> ^C
>>
>> => refcnt stays at previous value.
>>
>> The refcnt even leaks if the file can't be successfully opened,
>> for example because of lacking permissions.
>>     
>
> urgh.  Is any of this known to be post-2.6.25?
>   

2.6.25 is also affected. I don't know about earlier kernels.



  reply	other threads:[~2008-05-18 12:08 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <bug-10737-10286@http.bugzilla.kernel.org/>
2008-05-17 21:10 ` [Bugme-new] [Bug 10737] New: pktgen procfs problem Andrew Morton
2008-05-18  1:39   ` Patrick McHardy
2008-05-18  4:56     ` Andrew Morton
2008-05-18 12:06       ` Patrick McHardy [this message]
2008-05-18 13:24         ` Patrick McHardy
2008-05-18 15:31           ` Patrick McHardy
2008-05-19  7:54             ` Denis V. Lunev
2008-05-19 10:34               ` Patrick McHardy
2008-05-20  0:26               ` Ben Greear
2008-05-20  1:14                 ` Eric W. Biederman
2008-05-20  8:25                   ` Robert Olsson
2008-05-19 21:34             ` Eric W. Biederman
2008-05-19 22:19               ` Ben Greear
2008-05-19 15:19 Alexey Dobriyan
  -- strict thread matches above, loose matches on Subject: below --
2008-05-19 16:03 Alexey Dobriyan
2008-05-19 22:21 Alexey Dobriyan
2008-05-19 22:45 ` Robert Olsson
2008-05-20 21:57 Alexey Dobriyan
2008-05-20 21:17 ` Robert Olsson

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