Re: [PATCH 01/15] mm: poison struct page for ptlock

[Russell King]

On Thu, Nov 10, 2005 at 11:56:52AM -0800, Linus Torvalds wrote:
> On Thu, 10 Nov 2005, Andrew Morton wrote:
> > 
> > IOW we're assuming that no 32-bit architectures will obtain pagetables from
> > slab?
> 
> I thought ARM does?

ARM26 does.  On ARM, we play some games to weld to page tables together.
(We also duplicate them to give us a level of independence from the MMU
architecture and to give us space for things like young and dirty bits.)

As far as Linux is concerned, a 2nd level page table is one struct page
and L1 entries are two words in size.

I wrote up some docs on this and threw them into a comment in
include/asm-arm/pgtable.h...

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core
-
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/