Wu Fengguang wrote:
+#ifdef CONFIG_ADAPTIVE_READAHEAD
+
+/*
+ * The nature of read-ahead allows false tests to occur occasionally.
+ * Here we just do not bother to call get_page(), it's meaningless anyway.
+ */
+static inline struct page *__find_page(struct address_space *mapping,
+ pgoff_t offset)
+{
+ return radix_tree_lookup(&mapping->page_tree, offset);
+}
+
+static inline struct page *find_page(struct address_space *mapping,
+ pgoff_t offset)
+{
+ struct page *page;
+
+ read_lock_irq(&mapping->tree_lock);
+ page = __find_page(mapping, offset);
+ read_unlock_irq(&mapping->tree_lock);
+ return page;
+}
Meh, this is just open-coded elsewhere in readahead.c; I'd either
open code it, or do a new patch to replace the existing callers.
find_page should be in mm/filemap.c, btw (or include/linux/pagemap.h).
+
+/*
+ * Move pages in danger (of thrashing) to the head of inactive_list.
+ * Not expected to happen frequently.
+ */
+static unsigned long rescue_pages(struct page *page, unsigned long nr_pages)
Should probably be in mm/vmscan.c
--
Send instant messages to your online friends http://au.messenger.yahoo.com
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
