Re: [PATCH 2/2] mm,migration: Avoid race between shift_arg_pages()and rmap_walk() during migration by not migrating temporary stacks

[Rik van Riel]

On 05/01/2010 05:39 AM, Andrea Arcangeli wrote:

> ===
> Subject: fix race between shift_arg_pages and rmap_walk
>
> From: Andrea Arcangeli<aarcange@xxxxxxxxxx>
>
> migrate.c requires rmap to be able to find all ptes mapping a page at
> all times, otherwise the migration entry can be instantiated, but it
> can't be removed if the second rmap_walk fails to find the page.
>
> And split_huge_page() will have the same requirements as migrate.c
> already has.
>
> Signed-off-by: Andrea Arcangeli<aarcange@xxxxxxxxxx>

Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>

--
All rights reversed
--
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/