The patch titled mm: introduce probe_pages() has been added to the -mm tree. Its filename is mm-introduce-probe_pages.patch See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find out what to do about this ------------------------------------------------------ Subject: mm: introduce probe_pages() From: Wu Fengguang <wfg@xxxxxxxxxxxxxxxx> Introduce a pair of functions to probe the existence of file page. - int __probe_page(mapping, offset) - int probe_page(mapping, offset) Signed-off-by: Wu Fengguang <wfg@xxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxx> --- include/linux/pagemap.h | 2 ++ mm/filemap.c | 22 ++++++++++++++++++++++ 2 files changed, 24 insertions(+) diff -puN include/linux/pagemap.h~mm-introduce-probe_pages include/linux/pagemap.h --- 25/include/linux/pagemap.h~mm-introduce-probe_pages Fri May 26 13:33:48 2006 +++ 25-akpm/include/linux/pagemap.h Fri May 26 13:33:48 2006 @@ -68,6 +68,8 @@ static inline struct page *page_cache_al typedef int filler_t(void *, struct page *); +extern int __probe_page(struct address_space *mapping, pgoff_t offset); +extern int probe_page(struct address_space *mapping, pgoff_t offset); extern struct page * find_get_page(struct address_space *mapping, unsigned long index); extern struct page * find_lock_page(struct address_space *mapping, diff -puN mm/filemap.c~mm-introduce-probe_pages mm/filemap.c --- 25/mm/filemap.c~mm-introduce-probe_pages Fri May 26 13:33:48 2006 +++ 25-akpm/mm/filemap.c Fri May 26 13:33:48 2006 @@ -545,6 +545,28 @@ void fastcall __lock_page(struct page *p EXPORT_SYMBOL(__lock_page); /* + * Probing page existence. + */ +int __probe_page(struct address_space *mapping, pgoff_t offset) +{ + return !! radix_tree_lookup(&mapping->page_tree, offset); +} + +/* + * Here we just do not bother to grab the page, it's meaningless anyway. + */ +int probe_page(struct address_space *mapping, pgoff_t offset) +{ + int exists; + + read_lock_irq(&mapping->tree_lock); + exists = __probe_page(mapping, offset); + read_unlock_irq(&mapping->tree_lock); + + return exists; +} + +/* * a rather lightweight function, finding and getting a reference to a * hashed page atomically. */ _ Patches currently in -mm which might be from wfg@xxxxxxxxxxxxxxxx are readahead-kconfig-options.patch radixtree-introduce-__radix_tree_lookup_parent.patch radixtree-introduce-radix_tree_scan_hole.patch mm-introduce-probe_pages.patch mm-introduce-pg_readahead.patch readahead-add-look-ahead-support-to-__do_page_cache_readahead.patch readahead-delay-page-release-in-do_generic_mapping_read.patch readahead-insert-cond_resched-calls.patch readahead-minmax_ra_pages.patch readahead-events-accounting.patch readahead-rescue_pages.patch readahead-sysctl-parameters.patch readahead-min-max-sizes.patch readahead-state-based-method-aging-accounting.patch readahead-state-based-method-routines.patch readahead-state-based-method.patch readahead-context-based-method.patch readahead-initial-method-guiding-sizes.patch readahead-initial-method-thrashing-guard-size.patch readahead-initial-method-expected-read-size.patch readahead-initial-method-user-recommended-size.patch readahead-initial-method.patch readahead-backward-prefetching-method.patch readahead-seeking-reads-method.patch readahead-thrashing-recovery-method.patch readahead-call-scheme.patch readahead-laptop-mode.patch readahead-loop-case.patch readahead-nfsd-case.patch readahead-turn-on-by-default.patch readahead-debug-radix-tree-new-functions.patch readahead-debug-traces-showing-accessed-file-names.patch readahead-debug-traces-showing-read-patterns.patch - To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html