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From: David Marchand <david.marchand@redhat.com>
To: Luc Pelletier <lucp.at.work@gmail.com>
Cc: "Richardson, Bruce" <bruce.richardson@intel.com>,
	"dev@dpdk.org" <dev@dpdk.org>,
	 "Li, Xiaoyun" <xiaoyun.li@intel.com>,
	"stable@dpdk.org" <stable@dpdk.org>,
	 Aaron Conole <aconole@redhat.com>,
	Owen Hilyard <ohilyard@iol.unh.edu>,
	 "Ananyev, Konstantin" <konstantin.ananyev@intel.com>
Subject: Re: [PATCH v7] eal: fix rte_memcpy strict aliasing/alignment bugs
Date: Thu, 19 May 2022 18:47:35 +0200	[thread overview]
Message-ID: <CAJFAV8wAr_O0dAoPpTwMvH=JP4_WjB6F+KBzsY45jbc6BT=bLg@mail.gmail.com> (raw)
In-Reply-To: <CAJFAV8yxK-qqQtNLrNFqyo1T+6qTSGfotSGufgR1SOY1muMzdg@mail.gmail.com>

On Thu, Apr 7, 2022 at 5:24 PM David Marchand <david.marchand@redhat.com> wrote:
> On Thu, Mar 10, 2022 at 3:55 PM Ananyev, Konstantin
> <konstantin.ananyev@intel.com> wrote:
> > > Calls to rte_memcpy for 1 < n < 16 could result in unaligned
> > > loads/stores, which is undefined behaviour according to the C
> > > standard, and strict aliasing violations.
> > >
> > > The code was changed to use a packed structure that allows aliasing
> > > (using the __may_alias__ attribute) to perform the load/store
> > > operations. This results in code that has the same performance as the
> > > original code and that is also C standards-compliant.
> > >

Fixes: af75078fece3 ("first public release")
> > > Cc: stable@dpdk.org
> > >
> > > Signed-off-by: Luc Pelletier <lucp.at.work@gmail.com>
> > Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> > Tested-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
>

Applied, thanks Luc.

-- 
David Marchand


      parent reply	other threads:[~2022-05-19 16:47 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-15 19:41 [PATCH] eal: fix unaligned loads/stores in rte_memcpy_generic Luc Pelletier
2022-01-15 21:39 ` [PATCH v2] " Luc Pelletier
2022-01-15 22:13   ` Stephen Hemminger
2022-01-16 14:09     ` Luc Pelletier
2022-01-16 16:32       ` Stephen Hemminger
2022-01-16 14:13 ` [PATCH v3] " Luc Pelletier
2022-01-16 14:33   ` Luc Pelletier
2022-01-16 16:34     ` Stephen Hemminger
2022-01-16 17:59       ` Morten Brørup
2022-01-16 20:33 ` [PATCH v4] " Luc Pelletier
2022-01-17 15:37 ` [PATCH v5] " Luc Pelletier
2022-02-04 16:42   ` Luc Pelletier
2022-02-04 17:16   ` Ananyev, Konstantin
2022-02-08 16:53     ` Thomas Monjalon
2022-02-09 15:05     ` Luc Pelletier
2022-02-10 14:04       ` Ananyev, Konstantin
2022-02-10 16:56         ` Luc Pelletier
2022-02-11 15:51           ` Ananyev, Konstantin
2022-02-13 22:31             ` Luc Pelletier
2022-02-14 13:41               ` Ananyev, Konstantin
2022-02-25 15:51 ` [PATCH v6] eal: fix rte_memcpy strict aliasing/alignment bugs Luc Pelletier
2022-02-25 16:38 ` [PATCH v7] " Luc Pelletier
2022-03-10 14:55   ` Ananyev, Konstantin
2022-04-07 15:24     ` David Marchand
2022-04-07 15:32       ` David Marchand
2022-04-07 15:40         ` David Marchand
2022-05-13 19:15           ` Luc Pelletier
2022-05-19 16:41             ` David Marchand
2022-04-08 13:47       ` Luc Pelletier
2022-05-19 16:47       ` David Marchand [this message]

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