Re: [PPC64] Hugepage hash flushing bugfix

[William Lee Irwin III]

On Fri, Feb 25, 2005 at 03:14:46PM +1100, David Gibson wrote:
> Andrew, Linus, please apply:
> Fix a potentially bad (although very rarely triggered) bug in the
> ppc64 hugepage code.  hpte_update() did not correctly calculate the
> address for hugepages, so pte_clear() (which we use for hugepage ptes
> as well as normal ones) would not correctly flush the hash page table
> entry.  Under the right circumstances this could potentially lead to
> duplicate hash entries, which is very bad.
> davem's upcoming patch to pass the virtual address directly to
> set_pte() and its ilk will obsolete this, but this is bad enough it
> should probably be fixed in the meantime.
> Signed-off-by: David Gibson <dwg@xxxxxxxxxxx>

Very clear explanation. I second the motion for a rapid merge.

Acked-by: William Irwin <wli@xxxxxxxxxxxxxx>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/