On 04/24/2013 02:10 PM, Hans Feldt wrote: >> -----Original Message----- >> From: Serge Hallyn [mailto:serge.hal...@ubuntu.com] >> Sent: den 23 april 2013 14:52 >> To: Hans Feldt >> Cc: lxc-users@lists.sourceforge.net >> Subject: Re: [Lxc-users] Problem with core dumps generated from >> containers, apport > >>> 260 is the PID of my test program (sleep 1000) in the container. It of >>> course had another PID on the host... >> >> Hm, well that's certainly surprising to me, but there it is, in >> fs/coredump.c:format_corename(): case 'p' uses task_tgid_vnr(). >> >> Would you like to send a patch upstream to add 'P' as an option for using the >> global pid? > > Sorry this is out of my competence. I did check the code you pointed at and I > think there's > a name space conversion thing missing before handing over the PID over to > user space. I > could not find what function could do the trick. > > As a workaround if I temporarily change the core_pattern to write to file > instead, I > should get a readable useable core dump from a container process > > Thanks, > Hans
I've proposed a patch against the upstream kernel which adds a new "%P" with the global PID. This then makes the following core_pattern work on Ubuntu systems: |/usr/sbin/chroot /proc/%P/root /usr/share/apport/apport %p %s %c https://lkml.org/lkml/2013/4/24/518 -- Stéphane Graber Ubuntu developer http://www.ubuntu.com
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