linux/arch
Chen, Kenneth W 39dde65c99 [PATCH] shared page table for hugetlb page
Following up with the work on shared page table done by Dave McCracken.  This
set of patch target shared page table for hugetlb memory only.

The shared page table is particular useful in the situation of large number of
independent processes sharing large shared memory segments.  In the normal
page case, the amount of memory saved from process' page table is quite
significant.  For hugetlb, the saving on page table memory is not the primary
objective (as hugetlb itself already cuts down page table overhead
significantly), instead, the purpose of using shared page table on hugetlb is
to allow faster TLB refill and smaller cache pollution upon TLB miss.

With PT sharing, pte entries are shared among hundreds of processes, the cache
consumption used by all the page table is smaller and in return, application
gets much higher cache hit ratio.  One other effect is that cache hit ratio
with hardware page walker hitting on pte in cache will be higher and this
helps to reduce tlb miss latency.  These two effects contribute to higher
application performance.

Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Acked-by: Hugh Dickins <hugh@veritas.com>
Cc: Dave McCracken <dmccr@us.ibm.com>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Adam Litke <agl@us.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:21 -08:00
..
alpha [NET]: Alpha checksum annotations and cleanups. 2006-12-02 21:23:01 -08:00
arm WorkQueue: Fix up arch-specific work items where possible 2006-12-05 19:36:26 +00:00
arm26 [PATCH] remove bogus arch-specific syscall exports 2006-10-11 11:17:07 -07:00
avr32 AVR32: Add missing return instruction in __raw_writesb 2006-11-06 14:07:16 +01:00
cris [NET]: Cris checksum annotations and cleanups. 2006-12-02 21:23:02 -08:00
frv [NET]: FRV checksum annotations. 2006-12-02 21:23:03 -08:00
h8300 [NET]: H8300 checksum annotations and cleanups. 2006-12-02 21:23:04 -08:00
i386 [PATCH] shared page table for hugetlb page 2006-12-07 08:39:21 -08:00
ia64 [PATCH] shared page table for hugetlb page 2006-12-07 08:39:21 -08:00
m32r [NET]: M32R checksum annotations and cleanups. 2006-12-02 21:23:06 -08:00
m68k [NET]: M68K checksum annotations and cleanups. 2006-12-02 21:23:07 -08:00
m68knommu [PATCH] m68knommu: switch 68360 to using rtc_time 2006-12-06 07:41:26 -08:00
mips Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus 2006-12-06 16:17:37 -08:00
parisc [NET]: PARISC checksum annotations and cleanups. 2006-12-02 21:23:10 -08:00
powerpc [PATCH] shared page table for hugetlb page 2006-12-07 08:39:21 -08:00
ppc WorkQueue: Fix up arch-specific work items where possible 2006-12-05 19:36:26 +00:00
s390 WorkQueue: Fix up arch-specific work items where possible 2006-12-05 19:36:26 +00:00
sh [PATCH] shared page table for hugetlb page 2006-12-07 08:39:21 -08:00
sh64 [PATCH] shared page table for hugetlb page 2006-12-07 08:39:21 -08:00
sparc Fix misc Kconfig typos 2006-11-30 05:22:59 +01:00
sparc64 [PATCH] shared page table for hugetlb page 2006-12-07 08:39:21 -08:00
um [PATCH] uml: workqueue build fix 2006-12-07 08:39:20 -08:00
v850 [NET]: V850 checksum annotations and cleanups. 2006-12-02 21:23:13 -08:00
x86_64 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-12-05 14:37:56 +00:00
xtensa [PATCH] vmlinux.lds: consolidate initcall sections 2006-10-27 15:34:51 -07:00