From: "Ouyang, Changchun" <changchun.ouyang@intel.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: "dev@dpdk.org" <dev@dpdk.org>, Stephen Hemminger <shemming@brocade.com>
Subject: Re: [dpdk-dev] [PATCH 5/5] virtio: fix ring size negotiation
Date: Fri, 12 Jun 2015 01:49:27 +0000 [thread overview]
Message-ID: <F52918179C57134FAEC9EA62FA2F962511BA847C@shsmsx102.ccr.corp.intel.com> (raw)
In-Reply-To: <1434038007-8964-6-git-send-email-stephen@networkplumber.org>
> -----Original Message-----
> From: Stephen Hemminger [mailto:stephen@networkplumber.org]
> Sent: Thursday, June 11, 2015 11:53 PM
> To: Ouyang, Changchun
> Cc: dev@dpdk.org; Stephen Hemminger; Stephen Hemminger
> Subject: [PATCH 5/5] virtio: fix ring size negotiation
>
> From: Stephen Hemminger <shemming@brocade.com>
>
> Negotate the virtio ring size. The host may allow for very large rings but
> application may only want a smaller ring.
> Conversely, if the number of descriptors requested exceeds the virtio host
> queue size, then just silently use the smaller host size.
>
> This fixes issues with virtio in non-QEMU envirionments.
> For example Google Compute Engine allows up to 16K elements in ring.
>
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Changchun Ouyang<changchun.ouyang@intel.com>
next prev parent reply other threads:[~2015-06-12 1:49 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-11 15:53 [dpdk-dev] [PATCH 0/5 v3] virtio: patches Stephen Hemminger
2015-06-11 15:53 ` [dpdk-dev] [PATCH 1/5] virtio: remove blank lines Stephen Hemminger
2015-06-12 1:28 ` Ouyang, Changchun
2015-06-11 15:53 ` [dpdk-dev] [PATCH 2/5] virtio: don't enable/disable rx modes unless supported Stephen Hemminger
2015-06-12 1:29 ` Ouyang, Changchun
2015-06-11 15:53 ` [dpdk-dev] [PATCH 3/5] virtio: don't set mac table unless negotiated Stephen Hemminger
2015-06-12 1:30 ` Ouyang, Changchun
2015-06-11 15:53 ` [dpdk-dev] [PATCH 4/5] virtio: clarify feature bit handling Stephen Hemminger
2015-06-12 1:36 ` Ouyang, Changchun
2015-06-11 15:53 ` [dpdk-dev] [PATCH 5/5] virtio: fix ring size negotiation Stephen Hemminger
2015-06-12 1:49 ` Ouyang, Changchun [this message]
2015-06-12 12:46 ` [dpdk-dev] [PATCH 0/5 v3] virtio: patches Thomas Monjalon
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