Re: librados AIO problem diagnostic

[Sebastien Ponce <sebastien.ponce@cern.ch>]

As mentioned in the bug, I was a bit fast in concluding I could
reproduce the problem. I can reproduce the original one, but not the
remaining issue once the fix was applied.

Loic, can you confirm that you are using the wip-9356 branch of repo
git@github.com:sponce/ceph.git ?

Sebastien


On Thu, 2014-10-02 at 11:49 +0200, Sebastien Ponce wrote:
> Hurray, I manage to seg fault ! (sounds odd this sentence...)
> So indeed, fresh ubuntu, debug mode does it. What I've also changed in
> the meantime is the type of machine. It's still virtual, but more
> powerful (4 cores).
> 
> Let's debug it now...
> 
> Sebastien
> 
> 
> On Wed, 2014-10-01 at 15:09 +0200, Sebastien Ponce wrote:
> > Ok, we are getting closer then.
> > I'll try to reinstall the ubuntu machine and run with -g.
> > 
> > Sebastien
> > 
> > On Wed, 2014-10-01 at 15:08 +0200, Loic Dachary wrote:
> > > 
> > > On 01/10/2014 13:37, Sebastien Ponce wrote:
> > > > I've tried it on the RHEL6 like machine, but no luck. Or should I say I
> > > > was lucky ? Anyway no crash.
> > > > 
> > > > Discussing with Dan Van Der Ster, he told me that he had once the case
> > > > where the crash was there or not depending on the libc version. Just in
> > > > case, what are you using ? On the machine I've used this morning, it's
> > > > glibc-2.12-1.107.el6.x86_64
> > > 
> > > I'm using 
> > > 
> > > ii  libc-bin                                              2.19-0ubuntu3 
> > > 
> > > and I do not have glibc installed. I'm quite sure you can reproduce the problem on a fresh Ubuntu 14.04 with the following
> > > 
> > > ./autogen.sh ; ./configure --disable-static --with-debug CFLAGS="-Wall -g" CXXFLAGS="-Wall -g"
> > > 
> > > it fails consistently in my container. When I try with ./configure it does not fail. Something is going on when there is -g instead of the default flags. I checked that --disable-static and --with-debug make no difference.
> > > 
> > > Cheers
> > > 
> > > > 
> > > > Sebastien
> > > > 
> > > > On Wed, 2014-10-01 at 10:31 +0200, Loic Dachary wrote:
> > > >> Hi,
> > > >>
> > > >> On 01/10/2014 09:28, Sebastien Ponce wrote:
> > > >>> Thanks for this effort !
> > > >>> I'll look at all that this afternoon (it's mid morning here).
> > > >>
> > > >> Same here : I'm in Paris ;-)
> > > >>
> > > >>> Concerning configure and autogen, I do the standard (naive ?)
> > > >>> "./autogen.sh; ./configure; make" given by the readme.
> > > >>
> > > >> Could you try with
> > > >>
> > > >> ./autogen.sh ; ./configure --disable-static --with-debug CC='ccache gcc' CXX='ccache g++' CFLAGS="-Wall -g" CXXFLAGS="-Wall -g" ; make
> > > >>
> > > >> and let me know if you see a problem when running
> > > >>
> > > >> cd src
> > > >> rm -fr dev out ;  mkdir -p dev ; CEPH_NUM_MON=1 CEPH_NUM_OSD=3 ./vstart.sh -d -n -X -l mon osd
> > > >> ./ceph_test_rados_striper_api_aio
> > > >>
> > > >> I'm trying with your "./configure" on my end to check if this changes something.
> > > >>
> > > >> It's going to be a fun one ;-)
> > > >>
> > > >> Cheers
> > > >>
> > > >>>
> > > >>> Sebastien
> > > >>>
> > > >>>
> > > >>> On Wed, 2014-10-01 at 09:01 +0200, Loic Dachary wrote:
> > > >>>> Hi Sebastien,
> > > >>>>
> > > >>>> In the context of http://tracker.ceph.com/issues/9356 I'm trying to collect as much information as I can in an environment that can be reconstructed to avoid interferences. Could you please let me know which ./configure line you are using ? Or which do_autogen.sh command you are using.
> > > >>>>
> > > >>>> Thanks in advance :-)
> > > >>>>
> > > >>>
> > > >>>
> > > >>> --
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> > > >>>
> > > >>
> > > > 
> > > > 
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> > > 
> > 
> > 
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> 
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