Home » Mailing list archives » linux-kernel » 2007 » September » 24

[PATCH 0/1] x86: Convert cpuinfo_x86 array to a per_cpu array v3

!MAILaRCHIVE_VOTE_RePLACE
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
[view in full thread]
From: <travis@...>
To: Andrew Morton <akpm@...>, Andi Kleen <ak@...>
Cc: Christoph Lameter <clameter@...>, Jack Steiner <steiner@...>, <linux-mm@...>, <linux-kernel@...>
Subject: [PATCH 0/1] x86: Convert cpuinfo_x86 array to a per_cpu array v3
Date: Monday, September 24, 2007 - 5:08 pm

v3: fix compile errors in arch-i386-allmodconfig build

v2: rebasing on 2.6.23-rc6-mm1

Analyzing various data structures when NR_CPU count is raised
to 4096 shows the following arrays over 128k.  If the maximum
number of cpus are not installed (about 99.99% of the time),
then a large percentage of this memory is wasted.
--
	151289856  CALNDATA  irq_desc
	135530496  RMDATATA  irq_cfg
	  3145728  CALNDATA  cpu_data
	  2101248  BSS       irq_lists
	  2097152  RMDATATA  cpu_sibling_map
	  2097152  RMDATATA  cpu_core_map
	  1575936  BSS       irq_2_pin
	  1050624  BSS       irq_timer_state
	   614400  INITDATA  early_node_map
	   525376  PERCPU    per_cpu__kstat
	   524608  DATA      unix_proto
	   524608  DATA      udpv6_prot
	   524608  DATA      udplitev6_prot
	   524608  DATA      udplite_prot
	   524608  DATA      udp_prot
	   524608  DATA      tcpv6_prot
	   524608  DATA      tcp_prot
	   524608  DATA      rawv6_prot
	   524608  DATA      raw_prot
	   524608  DATA      packet_proto
	   524608  DATA      netlink_proto
	   524288  BSS       cpu_devices
	   524288  BSS       boot_pageset
	   524288  CALNDATA  boot_cpu_pda
	   262144  RMDATATA  node_to_cpumask
	   262144  BSS       __log_buf
	   131072  BSS       entries

cpu_sibling_map and cpu_core_map have been taken care of in
a prior patch.  This patch deals with the cpu_data array of
cpuinfo_x86 structs.  The model that was used in sparc64
architecture was adopted for x86.

-- 
-
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
Messages in current thread:
[PATCH 0/1] x86: Convert cpuinfo_x86 array to a per_cpu arra..., , (Mon Sep 24, 5:08 pm)
Re: [PATCH 0/1] x86: Convert cpuinfo_x86 array to a per_cpu ..., Andrew Morton, (Tue Oct 16, 4:18 am)
Re: [PATCH 0/1] x86: Convert cpuinfo_x86 array to a per_cpu ..., Mike Travis, (Fri Aug 3, 9:15 pm)
Re: [PATCH 0/1] x86: Convert cpuinfo_x86 array to a per_cpu ..., Christoph Lameter, (Tue Oct 16, 11:02 am)