From: Stephen Hemminger <stephen@networkplumber.org>
To: Yipeng Wang <yipeng1.wang@intel.com>,
Sameh Gobriel <sameh.gobriel@intel.com>,
Bruce Richardson <bruce.richardson@intel.com>
Cc: dev@dpdk.org, honnappa.nagarahalli@arm.com,
pablo.de.lara.guarch@intel.com
Subject: Re: [dpdk-dev] [PATCH] hash: document breakage with multi-writer thread
Date: Fri, 5 Jun 2020 11:35:08 -0700 [thread overview]
Message-ID: <20200605113508.746ba6b2@hermes.lan> (raw)
In-Reply-To: <20200604171731.6738-1-stephen@networkplumber.org>
On Thu, 4 Jun 2020 10:17:31 -0700
Stephen Hemminger <stephen@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@networkplumber.org>
> Cc: honnappa.nagarahalli@arm.com
> Cc: pablo.de.lara.guarch@intel.com
This restriction also needs to be added to the known issues
section of EAL
next prev parent reply other threads:[~2020-06-05 18:35 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-04 17:17 Stephen Hemminger
2020-06-04 17:51 ` Honnappa Nagarahalli
2020-06-04 17:58 ` Stephen Hemminger
2020-06-04 18:43 ` Honnappa Nagarahalli
2020-06-04 19:10 ` Wang, Yipeng1
2020-06-04 19:34 ` Honnappa Nagarahalli
2020-06-04 20:22 ` Wang, Yipeng1
2020-06-04 21:06 ` Stephen Hemminger
2020-06-04 21:32 ` Wang, Yipeng1
2020-06-05 18:35 ` Stephen Hemminger [this message]
2020-06-16 16:12 ` Thomas Monjalon
2020-11-26 17:56 ` Thomas Monjalon
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