On Thu, Feb 14, 2019 at 5:44 PM Burakov, Anatoly <anatoly.bura...@intel.com> wrote:
> On 14-Feb-19 1:27 PM, David Marchand wrote: > > pthread_getaffinity_np returns a >0 value when failing. > > > > This is mainly for the sake of correctness. > > The only case where it could fail is when passing an incorrect cpuset > > size wrt to the kernel. > > > > Fixes: 2eba8d21f3c9 ("eal: restrict cores auto detection") > > Signed-off-by: David Marchand <david.march...@redhat.com> > > --- > > lib/librte_eal/common/eal_common_options.c | 5 ++--- > > 1 file changed, 2 insertions(+), 3 deletions(-) > > > > diff --git a/lib/librte_eal/common/eal_common_options.c > b/lib/librte_eal/common/eal_common_options.c > > index 6c96f45..1f45f82 100644 > > --- a/lib/librte_eal/common/eal_common_options.c > > +++ b/lib/librte_eal/common/eal_common_options.c > > @@ -1343,10 +1343,9 @@ static int xdigit2val(unsigned char c) > > unsigned int lcore_id; > > unsigned int removed = 0; > > rte_cpuset_t affinity_set; > > - pthread_t tid = pthread_self(); > > > > - if (pthread_getaffinity_np(tid, sizeof(rte_cpuset_t), > > - &affinity_set) < 0) > > + if (pthread_getaffinity_np(pthread_self(), sizeof(rte_cpuset_t), > > + &affinity_set)) > > CPU_ZERO(&affinity_set); > > > > for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) { > > > CC: stable? > Not really sure about CCing stable for this. I did not get errors with pthread_getaffinity_np so far. Afaiu, it would need the kernel and libc to have different cpuset sizes. I did not investigate in which situations it could happen. -- David Marchand