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From: Yong Wang <yongwang@vmware.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH 1/5] vmxnet3: Fix VLAN Rx stripping
Date: Tue, 28 Oct 2014 21:57:14 +0000
Message-ID: <D07558ED.2308C%yongwang@vmware.com> (raw)
In-Reply-To: <20141022190933.44549786@uryu.home.lan>

On 10/22/14, 6:39 AM, "Stephen Hemminger" <stephen@networkplumber.org>
wrote:


>On Mon, 13 Oct 2014 18:42:18 +0000
>Yong Wang <yongwang@vmware.com> wrote:
>
>> Are you referring to the patch as a whole or your comment is about the
>>reset of vlan_tci on the "else" (no vlan tags stripped) path?  I am not
>>sure I get your comments here.  This patch simply fixes a bug on the rx
>>vlan stripping path (where valid vlan_tci stripped is overwritten
>>unconditionally later on the rx path in the original vmxnet3 pmd
>>driver). All the other pmd drivers are doing the same thing in terms of
>>translating descriptor status to rte_mbuf flags for vlan stripping.
>
>I was thinking that there are many fields in a pktmbuf and rather than
>individually
>setting them (like tci). The code should call the common
>rte_pktmbuf_reset before setting
>the fields.  That way when someone adds a field to mbuf they don't have
>to chasing
>through every driver that does it's own initialization.

Currently rte_pktmbuf_reset() is used in rte_pktmbuf_alloc() but looks
like most pmd drivers use rte_rxmbuf_alloc() to replenish rx buffers,
which directly calls __rte_mbuf_raw_alloc
() without calling rte_pktmbuf_reset(). How about we change that in a
separate patch to all pmd drivers so that we can keep their behavior
consistent?

  reply	other threads:[~2014-10-28 21:48 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-10-13  6:23 [dpdk-dev] [PATCH 0/5] vmxnet3 pmd fixes/improvement Yong Wang
2014-10-13  6:23 ` [dpdk-dev] [PATCH 1/5] vmxnet3: Fix VLAN Rx stripping Yong Wang
2014-10-13  9:31   ` Stephen Hemminger
2014-10-13 18:42     ` Yong Wang
2014-10-22 13:39       ` Stephen Hemminger
2014-10-28 21:57         ` Yong Wang [this message]
2014-10-29  9:04           ` Bruce Richardson
2014-10-29  9:41             ` Thomas Monjalon
2014-10-29 17:57               ` Yong Wang
2014-10-29 18:51                 ` Thomas Monjalon
2014-10-13  6:23 ` [dpdk-dev] [PATCH 2/5] vmxnet3: Add VLAN Tx offload Yong Wang
2014-10-13  6:23 ` [dpdk-dev] [PATCH 3/5] vmxnet3: Fix dev stop/restart bug Yong Wang
2014-10-13  6:23 ` [dpdk-dev] [PATCH 4/5] vmxnet3: Add rx pkt check offloads Yong Wang
2014-10-13  6:23 ` [dpdk-dev] [PATCH 5/5] vmxnet3: Some perf improvement on the rx path Yong Wang
2014-11-05  0:13   ` Thomas Monjalon
2014-10-13 20:29 ` [dpdk-dev] [PATCH 0/5] vmxnet3 pmd fixes/improvement Thomas Monjalon
2014-10-13 21:00   ` Yong Wang
2014-10-21 22:10     ` Yong Wang
2014-10-22  7:07       ` Cao, Waterman
2014-10-28 14:40         ` Thomas Monjalon
2014-10-28 19:59           ` Yong Wang
2014-10-29  0:33             ` Cao, Waterman
2014-11-05  1:32     ` Cao, Waterman
2014-11-04  5:57 ` Zhang, XiaonanX
2014-11-04 22:50   ` Thomas Monjalon
2014-11-05  5:26     ` Cao, Waterman

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