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| author | Andrew Morton <akpm@osdl.org> | 2004-05-22 08:01:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2004-05-22 08:01:30 -0700 |
| commit | 123e4df7e093329599a75ad8ad0eed9ebbd9aa27 (patch) | |
| tree | 286e401f5cc70586044b6ca44b1822c14d0ae6ce /init | |
| parent | b33a7bad9bcb5c8453d7a13a99b3151ebe69563f (diff) | |
| download | history-123e4df7e093329599a75ad8ad0eed9ebbd9aa27.tar.gz | |
[PATCH] rmap 9 remove pte_chains
From: Hugh Dickins <hugh@veritas.com>
Lots of deletions: the next patch will put in the new anon rmap, which
should look clearer if first we remove all of the old pte-pointer-based
rmap from the core in this patch - which therefore leaves anonymous rmap
totally disabled, anon pages locked in memory until process frees them.
Leave arch files (and page table rmap) untouched for now, clean them up in
a later batch. A few constructive changes amidst all the deletions:
Choose names (e.g. page_add_anon_rmap) and args (e.g. no more pteps) now
so we need not revisit so many files in the next patch. Inline function
page_dup_rmap for fork's copy_page_range, simply bumps mapcount under lock.
cond_resched_lock in copy_page_range. Struct page rearranged: no pte
union, just mapcount moved next to atomic count, so two ints can occupy one
long on 64-bit; i386 struct page now 32 bytes even with PAE. Never pass
PageReserved to page_remove_rmap, only do_wp_page did so.
From: Hugh Dickins <hugh@veritas.com>
Move page_add_anon_rmap's BUG_ON(page_mapping(page)) inside the rmap_lock
(well, might as well just check mapping if !mapcount then): if this page is
being mapped or unmapped on another cpu at the same time, page_mapping's
PageAnon(page) and page->mapping are volatile.
But page_mapping(page) is used more widely: I've a nasty feeling that
clear_page_anon, page_add_anon_rmap and/or page_mapping need barriers added
(also in 2.6.6 itself),
Diffstat (limited to 'init')
| -rw-r--r-- | init/main.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/init/main.c b/init/main.c index f19e679b03cd93..02f0edf9b153d0 100644 --- a/init/main.c +++ b/init/main.c @@ -84,7 +84,6 @@ extern void signals_init(void); extern void buffer_init(void); extern void pidhash_init(void); extern void pidmap_init(void); -extern void pte_chain_init(void); extern void radix_tree_init(void); extern void free_initmem(void); extern void populate_rootfs(void); @@ -460,7 +459,6 @@ asmlinkage void __init start_kernel(void) calibrate_delay(); pidmap_init(); pgtable_cache_init(); - pte_chain_init(); #ifdef CONFIG_X86 if (efi_enabled) efi_enter_virtual_mode(); |