[dpdk-dev] [PATCH] hash: document breakage with multi-writer thread

Thomas Monjalon thomas at monjalon.net
Thu Nov 26 18:56:21 CET 2020


16/06/2020 18:12, Thomas Monjalon:
> 05/06/2020 20:35, Stephen Hemminger:
> > On Thu,  4 Jun 2020 10:17:31 -0700
> > Stephen Hemminger <stephen at networkplumber.org> wrote:
> > 
> > > The code in rte_cuckoo_hash multi-writer support is broken if write
> > > operations are called from a non-EAL thread.
> > > 
> > > rte_lcore_id() wil return LCORE_ID_ANY (UINT32_MAX) for non EAL
> > > thread and that leads to using wrong local cache.
> > > 
> > > Add error checks and document the restriction.
> > > 
> > > Fixes: 9d033dac7d7c ("hash: support no free on delete")
> > > Fixes: 5915699153d7 ("hash: fix scaling by reducing contention")
> > > Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
> > > Cc: honnappa.nagarahalli at arm.com
> > > Cc: pablo.de.lara.guarch at intel.com
> > 
> > This restriction also needs to be added to the known issues
> > section of EAL
> 
> Are you going to send a v2 adding doc?

Any follow-up?





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