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Date: Wed, 2 May 2018 12:08:37 +0200
From: Olivier Matz <olivier.matz@6wind.com>
To: "Tan, Jianfeng" <jianfeng.tan@intel.com>
Cc: "Burakov, Anatoly" <anatoly.burakov@intel.com>,
 Maxime Coquelin <maxime.coquelin@redhat.com>, dev@dpdk.org,
 Thomas Monjalon <thomas@monjalon.net>
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Subject: Re: [dpdk-dev] pthread_barrier_deadlock in -rc1
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On Wed, May 02, 2018 at 06:01:20PM +0800, Tan, Jianfeng wrote:
> Hi Olivier and Anatoly,
> 
> [...]
> 
> > > > Below patch can fix another strange sigsegv issue in my VM. Please check
> > > > if it works for you. I doubt it's use-after-free problem which could
> > > > lead to different issues in different env. Please have a try.
> > > > 
> > > > 
> > > > diff --git a/lib/librte_eal/common/eal_common_thread.c
> > > > b/lib/librte_eal/common/eal_common_thread.c
> > > > index de69452..d91b67d 100644
> > > > --- a/lib/librte_eal/common/eal_common_thread.c
> > > > +++ b/lib/librte_eal/common/eal_common_thread.c
> > > > @@ -205,6 +205,7 @@ rte_ctrl_thread_create(pthread_t *thread, const char
> > > > *name,
> > > >                   goto fail;
> > > > 
> > > >           pthread_barrier_wait(&params->configured);
> > > > +       pthread_barrier_destroy(&params->configured);
> > > >           free(params);
> > > Should destroy also be called in fail case?
> > Yes, and also pthread_barrier_wait().
> > 
> > I did a quick test simulating a failure of rte_thread_setname(), and
> > without the wait, the barrier in the child thread blocks forever.
> > 
> 
> v1 has been sent without seeing this email. You are right, I misunderstood
> it. Will send a v2 based on this result.
> 
> Thanks,
> Jianfeng

Thanks.

Not sure it should be in the same patch, however there is also
a memory leak here:

        ret = pthread_create(thread, attr, rte_thread_init, (void *)params);
        if (ret != 0)
                return ret;