X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=mm%2Ftruncate.c;h=4a38dd1a4ce85efffaa8275ccaaf1b42251f0ae9;hb=0e859cacb0b01bdbe34b5200dd2457d4818248fa;hp=e07b1e682c38f5fca96436904eb1a9a262ce1426;hpb=6d03a68e6d5528630955452ec4b768dbde0dc00c;p=linux-2.6-omap-h63xx.git

diff --git a/mm/truncate.c b/mm/truncate.c
index e07b1e682c3..4a38dd1a4ce 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -13,6 +13,7 @@
 #include <linux/module.h>
 #include <linux/pagemap.h>
 #include <linux/pagevec.h>
+#include <linux/task_io_accounting_ops.h>
 #include <linux/buffer_head.h>	/* grr. try_to_release_page,
 				   do_invalidatepage */
 
@@ -50,6 +51,22 @@ static inline void truncate_partial_page(struct page *page, unsigned partial)
 		do_invalidatepage(page, partial);
 }
 
+void cancel_dirty_page(struct page *page, unsigned int account_size)
+{
+	/* If we're cancelling the page, it had better not be mapped any more */
+	if (page_mapped(page)) {
+		static unsigned int warncount;
+
+		WARN_ON(++warncount < 5);
+	}
+		
+	if (TestClearPageDirty(page) && account_size &&
+			mapping_cap_account_dirty(page->mapping)) {
+		dec_zone_page_state(page, NR_FILE_DIRTY);
+		task_io_account_cancelled_write(account_size);
+	}
+}
+
 /*
  * If truncate cannot remove the fs-private metadata from the page, the page
  * becomes anonymous.  It will be left on the LRU and may even be mapped into
@@ -66,10 +83,11 @@ truncate_complete_page(struct address_space *mapping, struct page *page)
 	if (page->mapping != mapping)
 		return;
 
+	cancel_dirty_page(page, PAGE_CACHE_SIZE);
+
 	if (PagePrivate(page))
 		do_invalidatepage(page, 0);
 
-	clear_page_dirty(page);
 	ClearPageUptodate(page);
 	ClearPageMappedToDisk(page);
 	remove_from_page_cache(page);
@@ -348,7 +366,6 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
 		for (i = 0; !ret && i < pagevec_count(&pvec); i++) {
 			struct page *page = pvec.pages[i];
 			pgoff_t page_index;
-			int was_dirty;
 
 			lock_page(page);
 			if (page->mapping != mapping) {
@@ -384,12 +401,8 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
 					  PAGE_CACHE_SIZE, 0);
 				}
 			}
-			was_dirty = test_clear_page_dirty(page);
-			if (!invalidate_complete_page2(mapping, page)) {
-				if (was_dirty)
-					set_page_dirty(page);
+			if (!invalidate_complete_page2(mapping, page))
 				ret = -EIO;
-			}
 			unlock_page(page);
 		}
 		pagevec_release(&pvec);