From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: Ouyang Changchun <changchun.ouyang@intel.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH 0/3] Vhost app removes dependency of REFCNT
Date: Fri, 24 Oct 2014 11:47:46 +0200 [thread overview]
Message-ID: <11605757.Du0pTjUQ40@xps13> (raw)
In-Reply-To: <1414138209-24431-1-git-send-email-changchun.ouyang@intel.com>
2014-10-24 16:10, Ouyang Changchun:
> To remove the dependency of RTE_MBUF_REFCNT for vhost zero copy,
> the mbuf need introduce EXTERNAL_MBUF(in ol_flags) to indicate it
> attaches to an external buffer, say, from guest space. And don't
> free the external buffer when freeing the mbuf itself in host, in
> addition, RX function in PMD need make sure not overwrite this flag
> when filling ol_flags from descriptors to mbuf.
So you are replacing refcnt by something else which requires special
handling in drivers.
I feel this is not the right design.
Why do you want to remove refcnt dependency?
--
Thomas
next prev parent reply other threads:[~2014-10-24 9:39 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-24 8:10 Ouyang Changchun
2014-10-24 8:10 ` [dpdk-dev] [PATCH 1/3] mbuf: Use EXTERNAL_MBUF to indicate external buffer Ouyang Changchun
2014-10-24 8:10 ` [dpdk-dev] [PATCH 2/3] pmd: RX function need keep EXTERNAL_MBUF flag Ouyang Changchun
2014-10-24 10:46 ` Ananyev, Konstantin
2014-10-24 12:34 ` Bruce Richardson
2014-10-24 15:43 ` Bruce Richardson
2014-10-24 15:58 ` Ananyev, Konstantin
2014-10-25 2:08 ` Ouyang, Changchun
2014-10-24 8:10 ` [dpdk-dev] [PATCH 3/3] vhost: Removes dependency on REFCNT for zero copy Ouyang Changchun
2014-10-24 9:47 ` Thomas Monjalon [this message]
2014-10-24 10:47 ` [dpdk-dev] [PATCH 0/3] Vhost app removes dependency of REFCNT Bruce Richardson
2014-10-25 1:01 ` Ouyang, Changchun
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