[Qemu-devel] [5385] qemu: improve scsi dma speed by increasing the dma buffer size

[Aurelien Jarno]

Revision: 5385
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5385
Author:   aurel32
Date:     2008-10-01 21:46:23 +0000 (Wed, 01 Oct 2008)

Log Message:
-----------
qemu: improve scsi dma speed by increasing the dma buffer size

taken from Xen 17267:f4a92f0db20f, original patch by Samuel Thibault.

Signed-off-by: Avi Kivity <address@hidden>
Signed-off-by: Anthony Liguori <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>

Modified Paths:
--------------
    trunk/hw/scsi-disk.c

Modified: trunk/hw/scsi-disk.c
===================================================================
--- trunk/hw/scsi-disk.c        2008-10-01 21:46:15 UTC (rev 5384)
+++ trunk/hw/scsi-disk.c        2008-10-01 21:46:23 UTC (rev 5385)
@@ -34,7 +34,7 @@
 #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;