Re: [Xen-devel] [PATCH] Fix stdvga performance for 32bit ops

To:	"Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
Subject:	Re: [Xen-devel] [PATCH] Fix stdvga performance for 32bit ops
From:	"Robert Phillips" <rsphillips@xxxxxxxxx>
Date:	Wed, 31 Oct 2007 19:37:39 -0400
Cc:	xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ben Guthro <bguthro@xxxxxxxxxxxxxxx>
Delivery-date:	Mon, 19 Nov 2007 10:12:45 -0800
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Yes, it should be 511.
Thanks.
-- rsp

On 10/31/07, Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote:

511 entries? 511*8 + 8 bytes for the read/write pointers == 4096?

-- Keir

On 31/10/07 20:28, "Ben Guthro" <bguthro@xxxxxxxxxxxxxxx> wrote:

Corrected a bug in the stdvga code where it did not
properly handle 32 bit operations.
The buf_ioreq_t can now store 32 bits of data.
Because this increases its size to 8 bytes,
only 510 elements fit in the buffered_iopage
(down from 672 elements).

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Re: [Xen-devel] [PATCH] Fix stdvga performance for 32bit ops