Andrea Arcangeli 1a44e14908 [PATCH] .text page fault SMP scalability optimization ...

We had a problem on ppc64 where with more than 4 threads a large system
wouldn't scale well while faulting in the .text (most of the time was spent
in the kernel despite it was an userland compute intensive app).  The
reason is the useless overwrite of the same pte from all cpu.

I fixed it this way (verified on an older kernel but the forward port is
almost identical).  This will benefit all archs not just ppc64.

Signed-off-by: Andrea Arcangeli <andrea@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2005-10-29 21:40:43 -07:00

..

bootmem.c

[PATCH] core remove PageReserved

2005-10-29 21:40:39 -07:00

fadvise.c

[PATCH] xip: madvice/fadvice: execute in place

2005-06-24 00:06:42 -07:00

filemap_xip.c

[PATCH] mm: rmap with inner ptlock

2005-10-29 21:40:41 -07:00

filemap.c

[PATCH] mm: update comments to pte lock

2005-10-29 21:40:42 -07:00

filemap.h

[PATCH] xip: reduce code duplication

2005-06-24 00:06:41 -07:00

fremap.c

[PATCH] mm: ptd_alloc take ptlock

2005-10-29 21:40:40 -07:00

highmem.c

[PATCH] gfp_t: the rest

2005-10-28 08:16:51 -07:00

hugetlb.c

[PATCH] hugetlb: demand fault handler

2005-10-29 21:40:43 -07:00

internal.h

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

Kconfig

[PATCH] mm: split page table lock

2005-10-29 21:40:42 -07:00

madvise.c

[PATCH] core remove PageReserved

2005-10-29 21:40:39 -07:00

Makefile

[PATCH] xip: fs/mm: execute in place

2005-06-24 00:06:41 -07:00

memory.c

[PATCH] .text page fault SMP scalability optimization

2005-10-29 21:40:43 -07:00

mempolicy.c

[PATCH] mm: pte_offset_map_lock loops

2005-10-29 21:40:40 -07:00

mempool.c

[PATCH] gfp_t: mm/* (easy parts)

2005-10-28 08:16:47 -07:00

mincore.c

[PATCH] freepgt: sys_mincore ignore FIRST_USER_PGD_NR

2005-04-19 13:29:20 -07:00

mlock.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

mmap.c

[PATCH] mm: unmap_vmas with inner ptlock

2005-10-29 21:40:41 -07:00

mprotect.c

[PATCH] mm: pte_offset_map_lock loops

2005-10-29 21:40:40 -07:00

mremap.c

[PATCH] mm: split page table lock

2005-10-29 21:40:42 -07:00

msync.c

[PATCH] mm: pte_offset_map_lock loops

2005-10-29 21:40:40 -07:00

nommu.c

[PATCH] mm: follow_page with inner ptlock

2005-10-29 21:40:41 -07:00

oom_kill.c

[PATCH] gfp flags annotations - part 1

2005-10-08 15:00:57 -07:00

page_alloc.c

[PATCH] mm: split page table lock

2005-10-29 21:40:42 -07:00

page_io.c

[PATCH] mm: split page table lock

2005-10-29 21:40:42 -07:00

page-writeback.c

[PATCH] timer initialization cleanup: DEFINE_TIMER

2005-09-09 14:03:48 -07:00

pdflush.c

[PATCH] Cleanup patch for process freezing

2005-06-25 17:10:13 -07:00

prio_tree.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

readahead.c

[PATCH] readahead: reset cache_hit earlier

2005-09-07 16:57:25 -07:00

rmap.c

[PATCH] mm: update comments to pte lock

2005-10-29 21:40:42 -07:00

shmem.c

[PATCH] mm: split page table lock

2005-10-29 21:40:42 -07:00

slab.c

[PATCH] slab: add additional debugging to detect slabs from the wrong node

2005-10-29 21:40:36 -07:00

sparse.c

[PATCH] sparsemem extreme: hotplug preparation

2005-09-05 00:05:38 -07:00

swap_state.c

[PATCH] mm: update comments to pte lock

2005-10-29 21:40:42 -07:00

swap.c

[PATCH] mm: split page table lock

2005-10-29 21:40:42 -07:00

swapfile.c

[PATCH] mm: split page table lock

2005-10-29 21:40:42 -07:00

thrash.c

[PATCH] swaptoken tuning

2005-10-29 21:40:35 -07:00

tiny-shmem.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

truncate.c

[PATCH] DocBook: fix some descriptions

2005-05-01 08:59:26 -07:00

vmalloc.c

[PATCH] mm: init_mm without ptlock

2005-10-29 21:40:40 -07:00

vmscan.c

[PATCH] mm: split page table lock

2005-10-29 21:40:42 -07:00