[XFS] Add a chunk of tracing code to diagnose truncate related issues.

SGI-PV: 938410
SGI-Modid: xfs-linux:xfs-kern:22966a

Signed-off-by: Nathan Scott <nathans@sgi.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index a3a4b5aaf5d9..bd9aba1f2353 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -1202,6 +1202,16 @@ out_unlock:
         return error;
 }
 
+STATIC int
+linvfs_invalidate_page(
+        struct page             *page,
+        unsigned long           offset)
+{
+        xfs_page_trace(XFS_INVALIDPAGE_ENTER,
+                        page->mapping->host, page, offset);
+        return block_invalidatepage(page, offset);
+}
+
 /*
  * Called to move a page into cleanable state - and from there
  * to be released. Possibly the page is already clean. We always
@@ -1279,6 +1289,7 @@ struct address_space_operations linvfs_aops = {
         .writepage              = linvfs_writepage,
         .sync_page              = block_sync_page,
         .releasepage            = linvfs_release_page,
+        .invalidatepage         = linvfs_invalidate_page,
         .prepare_write          = linvfs_prepare_write,
         .commit_write           = generic_commit_write,
         .bmap                   = linvfs_bmap,