From: Olivier Matz <olivier.matz@6wind.com>
To: Maxime Coquelin <maxime.coquelin@redhat.com>, dev@dpdk.org
Cc: stephen@networkplumber.org, mst@redhat.com, yuanhan.liu@linux.intel.com
Subject: Re: [dpdk-dev] [PATCH v2 1/2] mbuf: add rte_pktmbuff_reset_headroom function
Date: Wed, 5 Oct 2016 14:02:17 +0200 [thread overview]
Message-ID: <e924d240-6211-6624-3bc8-0304af4ea8a8@6wind.com> (raw)
In-Reply-To: <1475582724-5202-1-git-send-email-maxime.coquelin@redhat.com>
Hi Maxime,
On 10/04/2016 02:05 PM, Maxime Coquelin wrote:
> Some application use rte_mbuf_raw_alloc() function to improve
> performance by not resetting mbuf's fields to their default state.
>
> This can be however problematic for mbuf consumers that need some
> headroom, meaning that data_off field gets decremented after
> allocation. When the mbuf is re-used afterwards, there might not
> be enough room for the consumer to prepend anything, if the data_off
> field is not reset to its default value.
>
> This patch adds a new rte_pktmbuf_reset_headroom() function that
> applications can call to reset the data_off field.
> This patch also replaces current data_off affectations in the mbuf
> lib with a call to this function.
>
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Series:
Acked-by: Olivier Matz <olivier.matz@6wind.com>
Thanks
prev parent reply other threads:[~2016-10-05 12:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-04 12:05 Maxime Coquelin
2016-10-04 12:05 ` [dpdk-dev] [PATCH v2 2/2] app/testpmd/txonly: Reset headroom after raw packet allocation Maxime Coquelin
2016-10-05 12:02 ` Olivier Matz [this message]
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