kernel_optimize_test/arch/um/os-Linux
Jeff Dike 02dea0875b [PATCH] UML: Hotplug memory, take 2
Changes since first version
	added check for MADV_REMOVE support on the host
	fixed error return botch
	shrunk sprintf array by one character

This adds hotplug memory support to UML.  The mconsole syntax is
 	config mem=[+-]n[KMG]
In other words, add or subtract some number of kilobytes, megabytes, or
gigabytes.

Unplugged pages are allocated and then madvise(MADV_TRUNCATE), which is a
currently experimental madvise extension.  These pages are tracked so they
can be plugged back in later if the admin decides to give them back.  The
first page to be unplugged is used to keep track of about 4M of other
pages.  A list_head is the first thing on this page.  The rest is filled
with addresses of other unplugged pages.  This first page is not madvised,
obviously.

When this page is filled, the next page is used in a similar way and linked
onto a list with the first page.  Etc.  This whole process reverses when
pages are plugged back in.  When a tracking page no longer tracks any
unplugged pages, then it is next in line for plugging, which is done by
freeing pages back to the kernel.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31 12:18:50 -08:00
..
drivers [PATCH] uml: close TUN/TAP file descriptors 2006-02-07 16:12:32 -08:00
include Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
skas [PATCH] uml: initialize process FP registers properly 2006-02-07 16:12:32 -08:00
sys-i386 [PATCH] uml: initialize process FP registers properly 2006-02-07 16:12:32 -08:00
sys-x86_64 [PATCH] uml: initialize process FP registers properly 2006-02-07 16:12:32 -08:00
aio.c [PATCH] uml: Formatting changes 2006-01-06 08:33:45 -08:00
elf_aux.c [PATCH] uml makefiles sanitized 2005-09-29 08:46:26 -07:00
file.c [PATCH] uml: os_connect_socket error path fixup 2006-02-24 14:31:37 -08:00
helper.c [PATCH] uml: avoid malloc to sleep in atomic sections 2006-01-18 19:20:21 -08:00
irq.c [PATCH] uml: move libc-dependent irq code to os-Linux 2006-03-27 08:44:37 -08:00
main.c [PATCH] uml: implement soft interrupts 2006-01-18 19:20:20 -08:00
Makefile [PATCH] uml: move tty logging to os-Linux 2006-03-27 08:44:38 -08:00
mem.c [PATCH] UML: Hotplug memory, take 2 2006-03-31 12:18:50 -08:00
process.c [PATCH] UML: Hotplug memory, take 2 2006-03-31 12:18:50 -08:00
sigio.c [PATCH] uml: fix thread startup race 2006-03-27 08:44:38 -08:00
signal.c [PATCH] uml: implement soft interrupts 2006-01-18 19:20:20 -08:00
start_up.c [PATCH] UML: Hotplug memory, take 2 2006-03-31 12:18:50 -08:00
time.c [PATCH] uml: move libc-dependent time code 2006-01-18 19:20:19 -08:00
trap.c [PATCH] uml: implement soft interrupts 2006-01-18 19:20:20 -08:00
tt.c [PATCH] uml: move libc-dependent irq code to os-Linux 2006-03-27 08:44:37 -08:00
tty_log.c [PATCH] uml: move tty logging to os-Linux 2006-03-27 08:44:38 -08:00
tty.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
uaccess.c [PATCH] uml: implement soft interrupts 2006-01-18 19:20:20 -08:00
umid.c [PATCH] uml: prevent umid theft 2006-03-27 08:44:38 -08:00
user_syms.c [PATCH] Hostfs: update for new glibc - add missing symbol exports 2005-12-29 09:48:15 -08:00
util.c [PATCH] uml: implement soft interrupts 2006-01-18 19:20:20 -08:00