From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Tue, 14 Aug 2007 09:52:00 +0200
From: Jan Kiszka <jan.kiszka@domain.hid>
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Subject: Re: [Xenomai-help] rtcan bufferoverflow but no evidence
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To: rolandtollenaar@domain.hid
Cc: xenomai-help <xenomai@xenomai.org>

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Roland Tollenaar wrote:
> Hi,
>=20
>>> Recall that up to Xenomai 2.4 RTDM device/socket closing may fail (wi=
th
>>> -EAGAIN) when some other thread is currently using it and doesn't
>>> release it immediately when being "asked". That means for now you sho=
uld
>>> loop over [rt_dev_]close as long as EAGAIN is returned.
>>
>> Roland, could you please check the return code of [rt_dev_]close.
>> Nevertheless, I'm still puzzled why the socket shows up in
>> /proc/rtcan/sockets because rtcan_raw_close() is called before returni=
ng=20
> I have been battling with this all morning. I close with
>=20
> do{
>     ret=3Drt_dev_close(can_fd);
>     //printf("%d",ret)
> while(ret!=3D-9)
>=20
> but this only works (without fail) if I uncomment the printf line. I
> have now tried to put in a sleep(1) command instead but due to the cras=
h
> caused  by commenting out hte crash (does not come out of loop) I am no=
w
> trying to save my filesystem. :( :(.
>=20

That really sounds like this issue, just applied on CAN:

http://sourceforge.net/mailarchive/forum.php?thread_name=3D9203.194.114.6=
2.34.1186585293.squirrel%40webmail.krokoworld.de&forum_name=3Drtnet-users=


If yes, you would have found a second reason to look at 2.4... ;)

Jan


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