linux/include
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
..
acpi
asm-alpha [PATCH] add sem_is_read/write_locked() 2005-10-29 21:40:35 -07:00
asm-arm [PATCH] mm: tlb_finish_mmu forget rss 2005-10-29 21:40:37 -07:00
asm-arm26 [PATCH] mm: tlb_finish_mmu forget rss 2005-10-29 21:40:37 -07:00
asm-cris [PATCH] gfp_t: dma-mapping (cris) 2005-10-28 08:16:48 -07:00
asm-frv [PATCH] gfp_t: dma-mapping (frv) 2005-10-28 08:16:48 -07:00
asm-generic [PATCH] mm: tlb_finish_mmu forget rss 2005-10-29 21:40:37 -07:00
asm-h8300 [PATCH] Remove unused var from asm/futex.h 2005-09-21 16:16:29 -07:00
asm-i386 [PATCH] add sem_is_read/write_locked() 2005-10-29 21:40:35 -07:00
asm-ia64 [PATCH] mm: tlb_finish_mmu forget rss 2005-10-29 21:40:37 -07:00
asm-m32r [PATCH] gfp_t: dma-mapping (simple cases) 2005-10-28 08:16:49 -07:00
asm-m68k [PATCH] Remove unused var from asm/futex.h 2005-09-21 16:16:29 -07:00
asm-m68knommu [PATCH] Remove unused var from asm/futex.h 2005-09-21 16:16:29 -07:00
asm-mips BCM1480 HT support 2005-10-29 19:32:49 +01:00
asm-parisc Auto-update from upstream 2005-10-28 12:18:07 -04:00
asm-powerpc [PATCH] ppc32: Fix timekeeping 2005-10-12 08:24:47 -07:00
asm-ppc [PATCH] add sem_is_read/write_locked() 2005-10-29 21:40:35 -07:00
asm-ppc64 [PATCH] mm: page fault handlers tidyup 2005-10-29 21:40:37 -07:00
asm-s390 [PATCH] add sem_is_read/write_locked() 2005-10-29 21:40:35 -07:00
asm-sh [PATCH] add sem_is_read/write_locked() 2005-10-29 21:40:35 -07:00
asm-sh64 [PATCH] gfp_t: dma-mapping (simple cases) 2005-10-28 08:16:49 -07:00
asm-sparc [PATCH] gfp_t: dma-mapping (simple cases) 2005-10-28 08:16:49 -07:00
asm-sparc64 [PATCH] mm: tlb_finish_mmu forget rss 2005-10-29 21:40:37 -07:00
asm-um [PATCH] gfp_t: remaining bits of arch/* 2005-10-28 08:16:51 -07:00
asm-v850 [PATCH] Remove unused var from asm/futex.h 2005-09-21 16:16:29 -07:00
asm-x86_64 [PATCH] add sem_is_read/write_locked() 2005-10-29 21:40:35 -07:00
asm-xtensa [PATCH] gfp_t: dma-mapping (xtensa) 2005-10-28 08:16:49 -07:00
linux [PATCH] core remove PageReserved 2005-10-29 21:40:39 -07:00
math-emu
media [PATCH] i2c: ID redefinition cleanups 2005-10-28 14:02:13 -07:00
mtd
net Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6 2005-10-29 11:25:16 -07:00
pcmcia [PATCH] yenta: auto-tune EnE bridges for CardBus cards 2005-09-26 13:09:20 +02:00
rdma [IB] Fix MAD layer DMA mappings to avoid touching data buffer once mapped 2005-10-25 10:51:39 -07:00
rxrpc [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
scsi Merge branch 'master' 2005-10-28 12:31:34 -04:00
sound [PATCH] gfp_t: sound 2005-10-28 08:16:50 -07:00
video [PATCH] drivers/video: Replace custom macro with isdigit() 2005-09-13 08:22:33 -07:00