From: Stephen Hemminger <stephen@networkplumber.org>
To: Scott Mitchell <scott.k.mitch1@gmail.com>
Cc: "Morten Brørup" <mb@smartsharesystems.com>, dev@dpdk.org
Subject: Re: [PATCH v1 2/3] net/af_packet: RX/TX rte_memcpy, bulk free, prefetch
Date: Wed, 28 Jan 2026 08:57:22 -0800 [thread overview]
Message-ID: <20260128085722.435e6eb2@phoenix.local> (raw)
In-Reply-To: <CAFn2buA=6ucB+UJ4=q=XU57S=FMd-94v6O0AhCjzCFO+bu0eug@mail.gmail.com>
On Wed, 28 Jan 2026 07:37:13 -0800
Scott Mitchell <scott.k.mitch1@gmail.com> wrote:
> Thanks for the context! That makes sense. I dropped rte_memcpy and can
> re-evaluate once all my upcoming changes are merged.
The other thing worth noting is that compilers and tools like fortify
know what memcpy is and do bounds checking. But even with all the annotation
to x86 rte_memcpy() it still doesn't engage all the checks.
Plus there is the case (found in examples/fips_validation) where rte_memcpy
would read past end of array on stack.
Many platforms have rte_memcpy is just alias for memcpy.
The only ones with special code are x86 and ARM64.
next prev parent reply other threads:[~2026-01-28 16:57 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-27 18:13 [PATCH v1 0/3] net/af_packet: correctness fixes and improvements scott.k.mitch1
2026-01-27 18:13 ` [PATCH v1 1/3] net/af_packet: fix thread safety and frame calculations scott.k.mitch1
2026-01-27 18:39 ` Stephen Hemminger
2026-01-28 1:35 ` Scott Mitchell
2026-01-27 18:13 ` [PATCH v1 2/3] net/af_packet: RX/TX rte_memcpy, bulk free, prefetch scott.k.mitch1
2026-01-27 18:54 ` Stephen Hemminger
2026-01-28 1:23 ` Scott Mitchell
2026-01-28 9:49 ` Morten Brørup
2026-01-28 15:37 ` Scott Mitchell
2026-01-28 16:57 ` Stephen Hemminger [this message]
2026-01-27 18:13 ` [PATCH v1 3/3] net/af_packet: software checksum and tx poll control scott.k.mitch1
2026-01-27 18:57 ` Stephen Hemminger
2026-01-28 7:05 ` Scott Mitchell
2026-01-28 17:36 ` Stephen Hemminger
2026-01-28 18:59 ` Scott Mitchell
2026-01-27 20:45 ` [REVIEW] " Stephen Hemminger
2026-01-28 9:36 ` [PATCH v2 0/4] af_packet correctness, performance, cksum scott.k.mitch1
2026-01-28 9:36 ` [PATCH v2 1/4] net/af_packet: fix thread safety and frame calculations scott.k.mitch1
2026-01-28 16:59 ` Stephen Hemminger
2026-01-28 18:00 ` Scott Mitchell
2026-01-28 18:28 ` Stephen Hemminger
2026-01-28 9:36 ` [PATCH v2 2/4] net/af_packet: RX/TX unlikely, bulk free, prefetch scott.k.mitch1
2026-01-28 9:36 ` [PATCH v2 3/4] net/af_packet: tx poll control scott.k.mitch1
2026-01-28 9:36 ` [PATCH v2 4/4] net/af_packet: software checksum scott.k.mitch1
2026-01-28 18:27 ` Stephen Hemminger
2026-01-28 19:08 ` Scott Mitchell
2026-01-28 19:10 ` [PATCH v3 0/4] af_packet correctness, performance, cksum scott.k.mitch1
2026-01-28 19:10 ` [PATCH v3 1/4] net/af_packet: fix thread safety and frame calculations scott.k.mitch1
2026-01-28 19:10 ` [PATCH v3 2/4] net/af_packet: RX/TX unlikely, bulk free, prefetch scott.k.mitch1
2026-01-29 1:07 ` Stephen Hemminger
2026-02-02 5:29 ` Scott Mitchell
2026-01-28 19:10 ` [PATCH v3 3/4] net/af_packet: tx poll control scott.k.mitch1
2026-01-28 19:10 ` [PATCH v3 4/4] net/af_packet: software checksum scott.k.mitch1
2026-01-28 21:57 ` [REVIEW] " Stephen Hemminger
2026-02-02 7:55 ` Scott Mitchell
2026-02-02 16:58 ` Stephen Hemminger
2026-02-02 8:14 ` [PATCH v4 0/4] af_packet correctness, performance, cksum scott.k.mitch1
2026-02-02 8:14 ` [PATCH v4 1/4] net/af_packet: fix thread safety and frame calculations scott.k.mitch1
2026-02-02 8:14 ` [PATCH v4 2/4] net/af_packet: RX/TX bulk free, unlikely hint scott.k.mitch1
2026-02-02 8:14 ` [PATCH v4 3/4] net/af_packet: tx poll control scott.k.mitch1
2026-02-02 8:14 ` [PATCH v4 4/4] net/af_packet: add software checksum offload support scott.k.mitch1
2026-02-02 17:00 ` Stephen Hemminger
2026-02-02 18:47 ` Stephen Hemminger
2026-02-03 6:41 ` Scott Mitchell
2026-02-02 18:53 ` [PATCH v4 0/4] af_packet correctness, performance, cksum Stephen Hemminger
2026-02-03 7:07 ` [PATCH v5 " scott.k.mitch1
2026-02-03 7:07 ` [PATCH v5 1/4] net/af_packet: fix thread safety and frame calculations scott.k.mitch1
2026-02-03 7:07 ` [PATCH v5 2/4] net/af_packet: RX/TX bulk free, unlikely hint scott.k.mitch1
2026-02-03 7:07 ` [PATCH v5 3/4] net/af_packet: tx poll control scott.k.mitch1
2026-02-03 7:07 ` [PATCH v5 4/4] net/af_packet: add software checksum offload support scott.k.mitch1
2026-02-03 8:20 ` Scott Mitchell
2026-02-03 14:12 ` Stephen Hemminger
2026-02-04 2:59 ` Scott Mitchell
2026-02-03 14:13 ` Stephen Hemminger
2026-02-04 1:39 ` Scott Mitchell
2026-02-05 21:27 ` Stephen Hemminger
2026-02-06 1:11 ` [PATCH v6 0/4] af_packet correctness, performance, cksum scott.k.mitch1
2026-02-06 1:11 ` [PATCH v6 1/4] net/af_packet: fix thread safety and frame calculations scott.k.mitch1
2026-02-06 1:11 ` [PATCH v6 2/4] net/af_packet: RX/TX bulk free, unlikely hint scott.k.mitch1
2026-02-06 1:11 ` [PATCH v6 3/4] net/af_packet: tx poll control scott.k.mitch1
2026-02-06 1:11 ` [PATCH v6 4/4] net/af_packet: add software checksum offload support scott.k.mitch1
2026-02-06 1:49 ` [PATCH v6 0/4] af_packet correctness, performance, cksum Stephen Hemminger
2026-02-06 4:45 ` Scott Mitchell
2026-02-06 14:36 ` Morten Brørup
2026-02-06 16:11 ` Stephen Hemminger
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