2015-07-20 11:40, Stephen Hemminger:
> The number of descriptors can be either zero to use the whole
> available ring, or some value smaller. This is used to limit
> the number of mbufs allocated for the receive ring. If more
> descriptors are requested than available the size is silently
> truncat
> -Original Message-
> From: Stephen Hemminger [mailto:stephen at networkplumber.org]
> Sent: Tuesday, July 21, 2015 2:41 AM
> To: Ouyang, Changchun
> Cc: dev at dpdk.org; Stephen Hemminger
> Subject: [PATCH v2 1/2] virtio: fix queue size and number of descriptors
>
> The virtual queue r
The virtual queue ring size and the number of slots actually usable
are separate parameters. In the most common environment (QEMU)
the virtual queue ring size is 256, but some environments the
ring maybe much larger.
The ring size comes from the host and the driver must use the
actual size passed.
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