From: "Govindharajan, Hariprasad" <hariprasad.govindharajan@intel.com>
To: "Burakov, Anatoly" <anatoly.burakov@intel.com>,
Aaron Conole <aconole@redhat.com>
Cc: Remy Horton <remy.horton@intel.com>,
"Kovacevic, Marko" <marko.kovacevic@intel.com>,
Ori Kam <orika@mellanox.com>,
"Richardson, Bruce" <bruce.richardson@intel.com>,
"De Lara Guarch, Pablo" <pablo.de.lara.guarch@intel.com>,
"Nicolau, Radu" <radu.nicolau@intel.com>,
Akhil Goyal <akhil.goyal@nxp.com>,
"Kantecki, Tomasz" <tomasz.kantecki@intel.com>,
"dev@dpdk.org" <dev@dpdk.org>,
"stable@dpdk.org" <stable@dpdk.org>
Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH] examples/l3fwd: fix unaligned memory access
Date: Thu, 25 Jul 2019 14:08:42 +0000 [thread overview]
Message-ID: <2314E9952D36554C87E9192E9260764538FFCA48@IRSMSX104.ger.corp.intel.com> (raw)
In-Reply-To: <ef161dc8-5ea7-3f6d-3c36-b22946379b24@intel.com>
-----Original Message-----
From: Burakov, Anatoly
Sent: Thursday, July 25, 2019 3:01 PM
To: Aaron Conole <aconole@redhat.com>; Govindharajan, Hariprasad <hariprasad.govindharajan@intel.com>
Cc: Remy Horton <remy.horton@intel.com>; Kovacevic, Marko <marko.kovacevic@intel.com>; Ori Kam <orika@mellanox.com>; Richardson, Bruce <bruce.richardson@intel.com>; De Lara Guarch, Pablo <pablo.de.lara.guarch@intel.com>; Nicolau, Radu <radu.nicolau@intel.com>; Akhil Goyal <akhil.goyal@nxp.com>; Kantecki, Tomasz <tomasz.kantecki@intel.com>; dev@dpdk.org; stable@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] examples/l3fwd: fix unaligned memory access
On 25-Jul-19 2:27 PM, Aaron Conole wrote:
> hgovindh <hariprasad.govindharajan@intel.com> writes:
>
>> Fix unaligned memory access when reading IPv6 header which leads to
>> segmentation fault by changing aligned memory read to unaligned
>> memory read.
>>
>> Bugzilla ID: 279
>> Fixes: 64d3955de1de ("examples/l3fwd: fix ARM build")
>> Cc: maciej.czekaj@caviumnetworks.com
>> Cc: stable@dpdk.org
>> Signed-off-by: hgovindh <hariprasad.govindharajan@intel.com>
>> ---
>> examples/l3fwd/l3fwd_em.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/examples/l3fwd/l3fwd_em.c b/examples/l3fwd/l3fwd_em.c
>> index fa8f82be6..f0c443dae 100644
>> --- a/examples/l3fwd/l3fwd_em.c
>> +++ b/examples/l3fwd/l3fwd_em.c
>> @@ -285,7 +285,7 @@ em_get_ipv6_dst_port(void *ipv6_hdr, uint16_t portid, void *lookup_struct)
>> * Get part of 5 tuple: dst IP address lower 96 bits
>> * and src IP address higher 32 bits.
>> */
>> - key.xmm[1] = *(xmm_t *)data1;
>> + key.xmm[1] = _mm_loadu_si128((xmm_t *)data1);
>
> Nak. Please use a generic unaligned load, rather than an intel
> specific one. Otherwise, supported platforms like arm64 will have broken builds.
>
> Additionally, which chip and compiler did you use to get this error?
I have reproduced this error on Intel Xeon E5-2699 and GCC 7.4 (Ubuntu 18.04).
I have reproduced this error on Intel(R) Xeon(R) CPU and GCC 8.3.0 (Ubuntu 16.04).
>
>>
>> /*
>> * Get part of 5 tuple: dst port and src port
>
--
Thanks,
G Hariprasad
next prev parent reply other threads:[~2019-07-25 14:14 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-24 16:43 [dpdk-stable] " hgovindh
2019-07-25 7:01 ` [dpdk-stable] [dpdk-dev] " Ruifeng Wang (Arm Technology China)
2019-07-25 9:05 ` [dpdk-stable] " Bruce Richardson
2019-07-25 13:27 ` [dpdk-stable] [dpdk-dev] " Aaron Conole
2019-07-25 14:01 ` Burakov, Anatoly
2019-07-25 14:08 ` Govindharajan, Hariprasad [this message]
2019-07-25 14:01 ` Lipiec, Herakliusz
2019-07-25 14:23 ` Burakov, Anatoly
2019-07-25 16:29 ` [dpdk-stable] [PATCH v2] " hgovindh
2019-07-25 16:46 ` Bruce Richardson
2019-07-25 17:14 ` [dpdk-stable] [dpdk-dev] " Jerin Jacob Kollanukkaran
2019-07-25 18:56 ` David Christensen
2019-07-25 22:06 ` David Christensen
2019-07-26 10:58 ` [dpdk-stable] [EXT] " Jerin Jacob Kollanukkaran
2019-07-26 13:27 ` [dpdk-stable] [PATCH v3] " hgovindh
2019-07-26 13:37 ` [dpdk-stable] [dpdk-dev] " Burakov, Anatoly
2019-07-26 13:58 ` [dpdk-stable] [PATCH v4] " hgovindh
2019-07-30 8:50 ` Thomas Monjalon
2019-07-30 9:47 ` Bruce Richardson
2019-07-30 11:03 ` [dpdk-stable] [dpdk-dev] " Jerin Jacob Kollanukkaran
2019-07-30 17:45 ` David Christensen
2019-07-31 1:27 ` Ruifeng Wang (Arm Technology China)
2019-07-30 13:26 ` [dpdk-stable] [PATCH v5] Examples/l3fwd: " Hariprasad Govindharajan
2019-07-30 15:48 ` [dpdk-stable] [dpdk-dev] " Lipiec, Herakliusz
2019-07-30 19:58 ` Thomas Monjalon
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