Re: [Qemu-devel] [PATCH 5/6] kvm: qemu: improve scsi dma speed by increasing the dma buffer size

[Anthony Liguori <anthony@codemonkey.ws>]

Sorry Paul, I should have CC'd you here.  Do you see any immediate 
problem doing this?  Didn't see any comments when from you when it was 
originally posted.

Regards,

Anthony Liguori

Anthony Liguori wrote:
> From: Avi Kivity <avi@qumranet.com>
>
> taken from Xen 17267:f4a92f0db20f, original patch by Samuel Thibault.
>
> Signed-off-by: Avi Kivity <avi@qumranet.com>
> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
>
> diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
> index 44462d4..fc7fbe0 100644
> --- a/hw/scsi-disk.c
> +++ b/hw/scsi-disk.c
> @@ -34,7 +34,7 @@ do { fprintf(stderr, "scsi-disk: " fmt , ##args); } while (0)
>  #define SENSE_HARDWARE_ERROR  4
>  #define SENSE_ILLEGAL_REQUEST 5
>  
> -#define SCSI_DMA_BUF_SIZE    65536
> +#define SCSI_DMA_BUF_SIZE    131072
>  
>  typedef struct SCSIRequest {
>      SCSIDeviceState *dev;
>
>
>