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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