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Message-Id: <200707232317.11905.nigel@nigel.suspend2.net> Date: Mon, 23 Jul 2007 23:17:11 +1000 From: Nigel Cunningham <nigel@...el.suspend2.net> To: LKML <linux-kernel@...r.kernel.org> Subject: [RFC] [PATCH 2/5] Dynamically allocated pageflags - PageMappedToDisk conversion. Switch the "MappedToDisk" pageflag to using dynpageflags. Signed-off-by: Nigel Cunningham <nigel@...el.suspend2.net> include/linux/page-flags.h | 9 +++++---- mm/dyn_pageflags.c | 2 ++ mm/page_alloc.c | 3 ++- 3 files changed, 9 insertions(+), 5 deletions(-) diff -ruNp 920-mapped-to-disk-pageflag.patch-old/include/linux/page-flags.h 920-mapped-to-disk-pageflag.patch-new/include/linux/page-flags.h --- 920-mapped-to-disk-pageflag.patch-old/include/linux/page-flags.h 2007-07-11 22:19:39.000000000 +1000 +++ 920-mapped-to-disk-pageflag.patch-new/include/linux/page-flags.h 2007-07-23 22:13:01.000000000 +1000 @@ -7,6 +7,7 @@ #include <linux/types.h> #include <linux/mm_types.h> +#include <linux/dyn_pageflags.h> /* * Various page->flags bits: @@ -86,7 +87,6 @@ #define PG_compound 14 /* Part of a compound page */ #define PG_swapcache 15 /* Swap page: swp_entry_t in private */ -#define PG_mappedtodisk 16 /* Has blocks allocated on-disk */ #define PG_reclaim 17 /* To be reclaimed asap */ #define PG_buddy 19 /* Page is free, on buddy lists */ @@ -217,9 +217,10 @@ static inline void SetPageUptodate(struc #define __SetPageBuddy(page) __set_bit(PG_buddy, &(page)->flags) #define __ClearPageBuddy(page) __clear_bit(PG_buddy, &(page)->flags) -#define PageMappedToDisk(page) test_bit(PG_mappedtodisk, &(page)->flags) -#define SetPageMappedToDisk(page) set_bit(PG_mappedtodisk, &(page)->flags) -#define ClearPageMappedToDisk(page) clear_bit(PG_mappedtodisk, &(page)->flags) +extern struct dyn_pageflags dyn_MappedToDisk_map; +#define PageMappedToDisk(page) test_dynpageflag(&dyn_MappedToDisk_map, page) +#define SetPageMappedToDisk(page) set_dynpageflag(&dyn_MappedToDisk_map, page) +#define ClearPageMappedToDisk(page) clear_dynpageflag(&dyn_MappedToDisk_map, page) #define PageReclaim(page) test_bit(PG_reclaim, &(page)->flags) #define SetPageReclaim(page) set_bit(PG_reclaim, &(page)->flags) diff -ruNp 920-mapped-to-disk-pageflag.patch-old/mm/dyn_pageflags.c 920-mapped-to-disk-pageflag.patch-new/mm/dyn_pageflags.c --- 920-mapped-to-disk-pageflag.patch-old/mm/dyn_pageflags.c 2007-07-23 22:12:58.000000000 +1000 +++ 920-mapped-to-disk-pageflag.patch-new/mm/dyn_pageflags.c 2007-07-23 22:13:01.000000000 +1000 @@ -113,6 +113,8 @@ static int dyn_pageflags_debug = 0; for_each_online_pgdat(pgdat) \ for (zone_nr = 0; zone_nr < MAX_NR_ZONES; zone_nr++) +DECLARE_DYN_PAGEFLAGS(dyn_MappedToDisk_map); + /** * dump_pagemap: Display the contents of a bitmap for debugging purposes. * diff -ruNp 920-mapped-to-disk-pageflag.patch-old/mm/page_alloc.c 920-mapped-to-disk-pageflag.patch-new/mm/page_alloc.c --- 920-mapped-to-disk-pageflag.patch-old/mm/page_alloc.c 2007-07-11 22:19:42.000000000 +1000 +++ 920-mapped-to-disk-pageflag.patch-new/mm/page_alloc.c 2007-07-23 22:13:01.000000000 +1000 @@ -610,7 +610,8 @@ static int prep_new_page(struct page *pa page->flags &= ~(1 << PG_uptodate | 1 << PG_error | 1 << PG_referenced | 1 << PG_arch_1 | - 1 << PG_owner_priv_1 | 1 << PG_mappedtodisk); + 1 << PG_owner_priv_1); + ClearPageMappedToDisk(page); set_page_private(page, 0); set_page_refcounted(page); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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