linux/sound
Nick Piggin b5810039a5 [PATCH] core remove PageReserved
Remove PageReserved() calls from core code by tightening VM_RESERVED
handling in mm/ to cover PageReserved functionality.

PageReserved special casing is removed from get_page and put_page.

All setting and clearing of PageReserved is retained, and it is now flagged
in the page_alloc checks to help ensure we don't introduce any refcount
based freeing of Reserved pages.

MAP_PRIVATE, PROT_WRITE of VM_RESERVED regions is tentatively being
deprecated.  We never completely handled it correctly anyway, and is be
reintroduced in future if required (Hugh has a proof of concept).

Once PageReserved() calls are removed from kernel/power/swsusp.c, and all
arch/ and driver code, the Set and Clear calls, and the PG_reserved bit can
be trivially removed.

Last real user of PageReserved is swsusp, which uses PageReserved to
determine whether a struct page points to valid memory or not.  This still
needs to be addressed (a generic page_is_ram() should work).

A last caveat: the ZERO_PAGE is now refcounted and managed with rmap (and
thus mapcounted and count towards shared rss).  These writes to the struct
page could cause excessive cacheline bouncing on big systems.  There are a
number of ways this could be addressed if it is an issue.

Signed-off-by: Nick Piggin <npiggin@suse.de>

Refcount bug fix for filemap_xip.c

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-29 21:40:39 -07:00
..
arm Merge ../bleed-2.6 2005-10-28 10:13:16 -07:00
core [PATCH] core remove PageReserved 2005-10-29 21:40:39 -07:00
drivers [ALSA] Replace with kzalloc() - others 2005-09-12 10:48:22 +02:00
i2c [ALSA] Replace with kzalloc() - others 2005-09-12 10:48:22 +02:00
isa [ALSA] snd_opl3sa2: add missing pnp_unregister_driver() calls 2005-10-07 14:45:17 +02:00
mips [ALSA] Add snd_card_set_generic_dev() call 2005-09-12 10:41:56 +02:00
oss Useless includes of everything, the kitchen sink and version.h ... 2005-10-29 19:31:07 +01:00
parisc [PARISC] Update harmony from parisc tree 2005-10-21 22:42:38 -04:00
pci [PATCH] pci_ids: macros: replace partial with whole symbols 2005-10-28 15:36:59 -07:00
pcmcia [ALSA] Replace with kzalloc() - others 2005-09-12 10:48:22 +02:00
ppc [PATCH] Input: convert sound/ppc/beep to dynamic input_dev allocation 2005-10-28 09:52:54 -07:00
sparc [SPARC] cs4231: Fix SBUS support in this driver. 2005-09-21 00:41:22 -07:00
synth [ALSA] Replace with kzalloc() - others 2005-09-12 10:48:22 +02:00
usb [PATCH] gfp_t: drivers/usb 2005-10-28 08:16:49 -07:00
Kconfig [PATCH] Kconfig fix (ISA_DMA_API and sound/*) 2005-08-23 18:43:40 -07:00
Makefile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
last.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sound_core.c [PATCH] Driver Core: fix up all callers of class_device_create() 2005-10-28 09:52:52 -07:00
sound_firmware.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00