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Bug#787807: libc6: mq_open unexpectedly fails with errno 24



On Mon, 15 Jun 2015 11:55:47 +0200 Aurelien Jarno <aurelien@aurel32.net> 
wrote:
> Nothing has changed in the libc6 package for sometimes. When does the
> breakage started? I see you are using a 4.0 kernel, could it be due to
> that?

I made some tests on Debian VMs, that I have flying around.

Debian SID with 4.0 (amd64): problem as described above
Debian SID with 3.16 (amd64): same problem
Debian Wheezy with 3.2.0 (amd64): same problem
Debian Wheezy with 3.2.0 (i386): Works as expected (up to maxmsg=1000, with 
maxmsg=1001 I get errno=22 (Invalid argument) - that's fine for me, but is not 
what the man page says for this case. BTW the man page for mq_open is broken - 
double entries below ERRORS).

Looks like amd64 architecture has the problem since a while.

Tim

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