On Wed, Oct 22, 2014 at 08:54:44PM -0600, Scott Mann wrote:
> On Wed, Oct 22, 2014 at 8:41 PM, Ben Pfaff <[email protected]> wrote:
> 
> > On Wed, Oct 22, 2014 at 08:23:13PM -0600, Scott Mann wrote:
> > > On Wed, Oct 22, 2014 at 7:29 PM, Ben Pfaff <[email protected]> wrote:
> > >
> > > > On Wed, Oct 22, 2014 at 04:53:28PM -0700, Gurucharan Shetty wrote:
> > > > > > I seem to recall that there was a related bug a while back when we
> > > > > > added the existing shared library support.  I spent some time
> > looking
> > > > > > through the mailing list and the Git history, though, and I
> > couldn't
> > > > > > find it.
> > > > > Do you mean this one?
> > > > > commit 6a92c6f079f7f19c6a46d167af16ff600d3023d0
> > > > > Author: Gurucharan Shetty <[email protected]>
> > > > > Date:   Thu Jul 17 18:15:17 2014 -0700
> > > > >
> > > > >     ovsdb: Don't add ovsdb-server.c to libovsdb.
> > > > >
> > > > >     Without this change, with shared libraries, VLOG
> > > > >     constructor for ovsdb-server would get called twice corrupting
> > > > >     the 'vlog_modules' list causing an infinite loop.
> > > > >
> > > > >     Signed-off-by: Gurucharan Shetty <[email protected]>
> > > > >     Reported-by: Gur Stavi <[email protected]>
> > > > >     Acked-by: Ben Pfaff <[email protected]
> > > >
> > > > Yes.  Thank you for finding it!
> > > >
> > > > If this has recurred, then it's probably the same kind of problem, and
> > > > probably a similar fix is appropriate.  Scott, do you have a more
> > > > specific report, so we can look for the source of it?
> > > >
> > >
> > > What I observed was that each module's struct got pushed into the list,
> > > followed by test runs which would push another copy into the list, which
> > > would then clobber the list.
> >
> > What program exhibited the failures?  Which tests?
> >
> 
> In the patch I've submitted:
> If you back out the change in the constructor that checks for multiple
> entries in the list, but keep the changes that build shared objects, then
> you should be able to cause the failure with:
> 
> ./test/ovs-test test-odp parse-keys

I see the failure.

I suspect that the root cause is something different that we should fix
separately.  I spent a few minutes investigating, but I did not
completely isolate the problem.

I suggest that you submit the next version of your patch without the
change to vlog.  Obviously these failures must be solved, but I'd prefer
to treat them separately.
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