From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756271AbZEJOOv (ORCPT ); Sun, 10 May 2009 10:14:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754859AbZEJONV (ORCPT ); Sun, 10 May 2009 10:13:21 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:54522 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753844AbZEJONR (ORCPT ); Sun, 10 May 2009 10:13:17 -0400 From: "Rafael J. Wysocki" To: Wu Fengguang Subject: [RFC][PATCH 2/6] PM/Suspend: Do not shrink memory before suspend Date: Sun, 10 May 2009 15:50:58 +0200 User-Agent: KMail/1.11.2 (Linux/2.6.30-rc4-rjw; KDE/4.2.2; x86_64; ; ) Cc: pm list , Andrew Morton , LKML , Pavel Machek , Nigel Cunningham , David Rientjes , "linux-mm@kvack.org" References: <200905070040.08561.rjw@sisk.pl> <200905072348.59856.rjw@sisk.pl> <200905101548.57557.rjw@sisk.pl> In-Reply-To: <200905101548.57557.rjw@sisk.pl> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200905101550.59677.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Rafael J. Wysocki Remove the shrinking of memory from the suspend-to-RAM code, where it is not really necessary. Signed-off-by: Rafael J. Wysocki Acked-by: Nigel Cunningham Acked-by: Wu Fengguang --- kernel/power/main.c | 20 +------------------- mm/vmscan.c | 4 ++-- 2 files changed, 3 insertions(+), 21 deletions(-) Index: linux-2.6/kernel/power/main.c =================================================================== --- linux-2.6.orig/kernel/power/main.c +++ linux-2.6/kernel/power/main.c @@ -188,9 +188,6 @@ static void suspend_test_finish(const ch #endif -/* This is just an arbitrary number */ -#define FREE_PAGE_NUMBER (100) - static struct platform_suspend_ops *suspend_ops; /** @@ -226,7 +223,6 @@ int suspend_valid_only_mem(suspend_state static int suspend_prepare(void) { int error; - unsigned int free_pages; if (!suspend_ops || !suspend_ops->enter) return -EPERM; @@ -241,24 +237,10 @@ static int suspend_prepare(void) if (error) goto Finish; - if (suspend_freeze_processes()) { - error = -EAGAIN; - goto Thaw; - } - - free_pages = global_page_state(NR_FREE_PAGES); - if (free_pages < FREE_PAGE_NUMBER) { - pr_debug("PM: free some memory\n"); - shrink_all_memory(FREE_PAGE_NUMBER - free_pages); - if (nr_free_pages() < FREE_PAGE_NUMBER) { - error = -ENOMEM; - printk(KERN_ERR "PM: No enough memory\n"); - } - } + error = suspend_freeze_processes(); if (!error) return 0; - Thaw: suspend_thaw_processes(); usermodehelper_enable(); Finish: Index: linux-2.6/mm/vmscan.c =================================================================== --- linux-2.6.orig/mm/vmscan.c +++ linux-2.6/mm/vmscan.c @@ -2054,7 +2054,7 @@ unsigned long global_lru_pages(void) + global_page_state(NR_INACTIVE_FILE); } -#ifdef CONFIG_PM +#ifdef CONFIG_HIBERNATION /* * Helper function for shrink_all_memory(). Tries to reclaim 'nr_pages' pages * from LRU lists system-wide, for given pass and priority. @@ -2194,7 +2194,7 @@ out: return sc.nr_reclaimed; } -#endif +#endif /* CONFIG_HIBERNATION */ /* It's optimal to keep kswapds on the same CPUs as their memory, but not required for correctness. So if the last cpu in a node goes