From: Andrew Morton <akpm@osdl.org>
To: Christoph Lameter <clameter@sgi.com>
Cc: linux-mm@kvack.org, kamezawa.hiroyu@jp.fujitsu.com,
lee.schermerhorn@hp.com, hugh@veritas.com
Subject: Re: [PATCH 1/7] page migration: Reorder functions in migrate.c
Date: Fri, 28 Apr 2006 17:36:50 -0700 [thread overview]
Message-ID: <20060428173650.146a6605.akpm@osdl.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0604281712210.4170@schroedinger.engr.sgi.com>
hm. migrate_pages() locks two pages at the same time. We've avoided doing
that.
a) what prevents ab/ba deadlocks in the migration code?
b) if some other part of the kernel later decides to lock two pages at
the same time, what protocol should that code follow to avoid ab/ba
deadlocks? lowest-pfn-first might be one.
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next prev parent reply other threads:[~2006-04-29 0:36 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-28 6:03 Christoph Lameter
2006-04-28 6:03 ` [PATCH 2/7] page migration: Remove unnecessarily exported functions Christoph Lameter
2006-04-28 6:03 ` [PATCH 3/7] page migration: Change handling of address spaces Christoph Lameter
2006-04-28 6:03 ` [PATCH 4/7] page migration: Drop nr_refs parameter Christoph Lameter
2006-04-28 7:30 ` KAMEZAWA Hiroyuki
2006-04-28 13:57 ` Christoph Lameter
2006-04-28 6:03 ` [PATCH 5/7] page migration: synchronize from and to lists Christoph Lameter
2006-04-28 7:46 ` KAMEZAWA Hiroyuki
2006-04-28 15:31 ` Christoph Lameter
2006-04-29 0:27 ` KAMEZAWA Hiroyuki
2006-04-29 0:33 ` Christoph Lameter
2006-04-29 0:44 ` KAMEZAWA Hiroyuki
2006-04-29 0:46 ` Christoph Lameter
2006-04-28 6:03 ` [PATCH 6/7] page migration: Extract try_to_unmap Christoph Lameter
2006-04-28 6:03 ` [PATCH 7/7] page migration: Add new fallback function Christoph Lameter
2006-04-28 6:42 ` Christoph Lameter
2006-04-28 22:08 ` [PATCH 1/7] page migration: Reorder functions in migrate.c Andrew Morton
2006-04-28 23:01 ` Christoph Lameter
2006-04-28 23:18 ` Andrew Morton
2006-04-29 0:14 ` Christoph Lameter
2006-04-29 0:36 ` Andrew Morton [this message]
2006-04-29 0:46 ` Christoph Lameter
2006-04-29 2:27 ` Andrew Morton
2006-04-29 2:48 ` Christoph Lameter
2006-04-29 0:54 ` Christoph Lameter
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