tree fede2324f4348701e60758d7f894aae4b09cdc9a
parent d75a0fcda2cfc71b50e16dc89e0c32c57d427e85
author Christoph Lameter <clameter@sgi.com> 1151053417 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1151073770 -0700

[PATCH] Swapless page migration: modify core logic

Use the migration entries for page migration

This modifies the migration code to use the new migration entries.  It now
becomes possible to migrate anonymous pages without having to add a swap
entry.

We add a couple of new functions to replace migration entries with the proper
ptes.

We cannot take the tree_lock for migrating anonymous pages anymore.  However,
we know that we hold the only remaining reference to the page when the page
count reaches 1.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>