Re: [PATCH mm-unstable v1 04/26] arm/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE

Russell King (Oracle)
2023-01-13T17:49:02Z

On Fri, Jan 13, 2023 at 06:10:04PM +0100, David Hildenbrand wrote:
> Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by stealing one bit from the
> offset. This reduces the maximum swap space per file to 64 GiB (was 128
> GiB).
>
> While at it drop the PTE_TYPE_FAULT from __swp_entry_to_pte() which is
> defined to be 0 and is rather confusing because we should be dealing
> with "Linux PTEs" not "hardware PTEs". Also, properly mask the type in
> __swp_entry().
>
> Cc: Russell King <linux@armlinux.org.uk>
> Signed-off-by: David Hildenbrand <david@redhat.com>

Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

Thanks.

--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!