[patch 3/18] ext3 set_page_dirty fix

From: Andrew Morton (akpm@zip.com.au)
Date: Sun May 26 2002 - 15:38:53 EST


The set_page_dirty() in the ext3_writepage() failure path isn't right.
set_page_dirty() will alter buffer states - it's a "whole page"
dirtying.

__set_page_dirty_buffers() is emitting warnings when it refuses to set
dirty a non-uptodate buffer against a partially-mapped page.

All we want to do in there is to move the page back onto
mapping->dirty_pages, without altering the state of its buffers.

=====================================

--- 2.5.18/fs/ext3/inode.c~ext3-set_page_dirty Sun May 26 12:37:43 2002
+++ 2.5.18-akpm/fs/ext3/inode.c Sun May 26 12:37:43 2002
@@ -1327,7 +1327,13 @@ static int ext3_writepage(struct page *p
 out_fail:
         
         unlock_kernel();
- set_page_dirty(page);
+
+ /*
+ * We have to fail this writepage to avoid cross-fs transactions.
+ * Put the page back on mapping->dirty_pages, but leave its buffer's
+ * dirty state as-is.
+ */
+ __set_page_dirty_nobuffers(page);
         unlock_page(page);
         return ret;
 }

-
-
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