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lguest: use ioremap_cache, not ioremap

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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 <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2008-05-30 15:09:40 -05:00
parent 0a2ce2ffc3
commit e27810f113
1 changed files with 1 additions and 1 deletions
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2
drivers/lguest/lguest_device.c
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@ -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)