From: Hugh Dickins <hugh@veritas.com>
Date: Wed, 22 Jun 2005 00:15:07 +0000 (-0700)
Subject: [PATCH] mbind: check_range use standard ptwalk
X-Git-Tag: v2.6.13-rc4~130^2~202^2~137
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=91612e0df20a52f61db3cac280c153311b36df7a;p=pandora-kernel.git

[PATCH] mbind: check_range use standard ptwalk

Strict mbind's check for currently mapped pages being on node has been
using a slow loop which re-evaluates pgd, pud, pmd, pte for each entry:
replace that by a standard four-level page table walk like others in mm.
Since mmap_sem is held for writing, page_table_lock can be taken at the
inner level to limit latency.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

Reading git-diff-tree failed