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

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To: Mel Gorman <mel@xxxxxxxxx>
Subject: Re: [PATCH 2/2] mm,migration: Avoid race between shift_arg_pages() and rmap_walk() during migration by not migrating temporary stacks
From: Christoph Lameter <cl@xxxxxxxxx>
Date: Tue, 11 May 2010 10:56:00 -0500 (CDT)
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Linux-MM <linux-mm@xxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, Minchan Kim <minchan.kim@xxxxxxxxx>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>, Andrea Arcangeli <aarcange@xxxxxxxxxx>, Rik van Riel <riel@xxxxxxxxxx>
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On Tue, 11 May 2010, Mel Gorman wrote:

> Or just identify the temporary stack from the migration side instead of
> adding to the cost of exec?

Adding one off checks to a generic mechanism isnt really clean
programming. Using the provided means of disabling a generic mechanism is.

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

References:
- [PATCH 0/2] Fix migration races in rmap_walk() V3
  - From: Mel Gorman
- [PATCH 2/2] mm,migration: Avoid race between shift_arg_pages() and rmap_walk() during migration by not migrating temporary stacks
  - From: Mel Gorman
- Re: [PATCH 2/2] mm,migration: Avoid race between shift_arg_pages() and rmap_walk() during migration by not migrating temporary stacks
  - From: Christoph Lameter
- Re: [PATCH 2/2] mm,migration: Avoid race between shift_arg_pages() and rmap_walk() during migration by not migrating temporary stacks
  - From: Mel Gorman
- Re: [PATCH 2/2] mm,migration: Avoid race between shift_arg_pages() and rmap_walk() during migration by not migrating temporary stacks
  - From: Christoph Lameter
- Re: [PATCH 2/2] mm,migration: Avoid race between shift_arg_pages() and rmap_walk() during migration by not migrating temporary stacks
  - From: Mel Gorman
- Re: [PATCH 2/2] mm,migration: Avoid race between shift_arg_pages() and rmap_walk() during migration by not migrating temporary stacks
  - From: Christoph Lameter
- Re: [PATCH 2/2] mm,migration: Avoid race between shift_arg_pages() and rmap_walk() during migration by not migrating temporary stacks
  - From: Mel Gorman

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