Thanks to Jon Corbet & LWN. Only took me a day to join the dots.
Host->Guest netcat before (with unnecessily large receive buffers):
1073741824 bytes (1.1 GB) copied, 24.7528 seconds, 43.4 MB/s
After:
1073741824 bytes (1.1 GB) copied, 17.6369 seconds, 60.9 MB/s
Signed-off-by: Rusty Russell <[EMAIL PROTECTED]>
---
drivers/lguest/lguest_device.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -r f0417cb4869e drivers/lguest/lguest_device.c
--- a/drivers/lguest/lguest_device.c Fri May 16 15:51:08 2008 +1000
+++ b/drivers/lguest/lguest_device.c Fri May 16 20:43:36 2008 +1000
@@ -27,7 +27,7 @@ static unsigned int dev_index;
* __iomem to quieten sparse. */
static inline void *lguest_map(unsigned long phys_addr, unsigned long pages)
{
- return (__force void *)ioremap(phys_addr, PAGE_SIZE*pages);
+ return (__force void *)ioremap_cache(phys_addr, PAGE_SIZE*pages);
}
static inline void lguest_unmap(void *addr)
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