Rudolf Usselmann <[email protected]> writes:
>
> Just curious, did anybody ever look in to this at all ? I keep
> on downloading new kernels and trying 4GB of memory - still no
> luck.
>
> I did file a bug report but didn't get any notifications at all.
> I don't subscribe to the linux-kernel list so not sure if anything
> ever came up or not.
>
> Is there a way to get this fixed ?
Does the following patch (against a 2.6.12rc3 kernel) fix your problems?
-Andi
[...]
Please use this version instead, previous one was broken.
Don't look up struct page * of physical address in iounmap
it could be in a memory hole not mapped in mem_map
Signed-off-by: Andi Kleen <[email protected]>
Index: linux/arch/x86_64/mm/ioremap.c
===================================================================
--- linux.orig/arch/x86_64/mm/ioremap.c
+++ linux/arch/x86_64/mm/ioremap.c
@@ -272,7 +272,7 @@ void iounmap(volatile void __iomem *addr
if ((p->flags >> 20) &&
p->phys_addr + p->size - 1 < virt_to_phys(high_memory)) {
/* p->size includes the guard page, but cpa doesn't like that */
- change_page_attr(virt_to_page(__va(p->phys_addr)),
+ change_page_attr_addr(__va(p->phys_addr),
p->size >> PAGE_SHIFT,
PAGE_KERNEL);
global_flush_tlb();
-
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