Re: kernel (64bit) 4GB memory support

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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

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(p->phys_addr,
 				 p->size >> PAGE_SHIFT,
 				 PAGE_KERNEL);
 		global_flush_tlb();
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux