linux/arch/i386/mm
Zachary Amsden c9b02a2413 [PATCH] i386: use set_pte macros in a couple places where they were missing
Also, setting PDPEs in PAE mode does not require atomic operations, since the
PDPEs are cached by the processor, and only reloaded on an explicit or
implicit reload of CR3.

Since the four PDPEs must always be present in an active root, and the kernel
PDPE is never updated, we are safe even from SMIs and interrupts / NMIs using
task gates (which reload CR3).  Actually, much of this is moot, since the user
PDPEs are never updated either, and the only usage of task gates is by the
doublefault handler.  It appears the only place PGDs get updated in PAE mode
is in init_low_mappings() / zap_low_mapping() for initial page table creation
and recovery from ACPI sleep state, and these sites are safe by inspection.
Getting rid of the cmpxchg8b saves code space and 720 cycles in pgd_alloc on
P4.

Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-05 00:06:12 -07:00
..
boot_ioremap.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
discontig.c [PATCH] Move the fix to align node_end_pfns to a proper location 2005-08-07 10:00:39 -07:00
extable.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
fault.c [PATCH] i386: inline asm cleanup 2005-09-05 00:06:11 -07:00
highmem.c [PATCH] kdump: Routines for copying dump pages 2005-06-25 16:24:53 -07:00
hugetlbpage.c [PATCH] remove hugetlb_clean_stale_pgtable() and fix huge_pte_alloc() 2005-09-05 00:05:46 -07:00
init.c [PATCH] i386: use set_pte macros in a couple places where they were missing 2005-09-05 00:06:12 -07:00
ioremap.c [PATCH] iounmap debugging 2005-07-07 18:23:35 -07:00
Makefile [PATCH] sparsemem memory model for i386 2005-06-23 09:45:05 -07:00
mmap.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pageattr.c [PATCH] i386: use set_pte macros in a couple places where they were missing 2005-09-05 00:06:12 -07:00
pgtable.c [PATCH] printk: arch/i386/mm/pgtable.c 2005-06-25 16:25:08 -07:00