Commit 7e871b6c authored by Paolo 'Blaisorblade' Giarrusso's avatar Paolo 'Blaisorblade' Giarrusso Committed by Linus Torvalds
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[PATCH] mm: update stale comment for removal of page->list 



Update comment for the 2.6.6-rc1 conversion from page->list and
address_space->{clean,dirty,locked}_pages to radix tree tagging and ->lru.

I've mostly avoided to mention page lists (at least I've shortened the
comment).

Signed-off-by: default avatarPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Acked-by: default avatarHugh Dickins <hugh@veritas.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent f875a1a6

include/linux/mm.h

+4 −5
Original line number Diff line number Diff line
@@ -350,7 +350,8 @@ static inline void put_page(struct page *page) 
 * only one copy in memory, at most, normally.

 *

 * For the non-reserved pages, page_count(page) denotes a reference count.

 *   page_count() == 0 means the page is free.

 *   page_count() == 0 means the page is free. page->lru is then used for

 *   freelist management in the buddy allocator.

 *   page_count() == 1 means the page is used for exactly one purpose

 *   (e.g. a private data page of one process).

 *
@@ -376,10 +377,8 @@ static inline void put_page(struct page *page) 
 * attaches, plus 1 if `private' contains something, plus one for

 * the page cache itself.

 *

 * All pages belonging to an inode are in these doubly linked lists:

 * mapping->clean_pages, mapping->dirty_pages and mapping->locked_pages;

 * using the page->list list_head. These fields are also used for

 * freelist managemet (when page_count()==0).

 * Instead of keeping dirty/clean pages in per address-space lists, we instead

 * now tag pages as dirty/under writeback in the radix tree.

 *

 * There is also a per-mapping radix tree mapping index to the page

 * in memory if present. The tree is rooted at mapping->root.

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