Re: 1352 NUL bytes at the end of a page? (was Re: Assertion `s &&s->tree' failed: The saga continues.)

[Andrew Morton]

Steven Cole <elenstev@xxxxxxxxxxx> wrote:
>
> 1) Apply your patch to 2.6.6-current, build with PREEMPT
> 2) Test bk pull via ppp on reiserfs until and if it breaks.
> 3) Test bk pull via ppp on ext3 and take a look at the s.ChangeSet file
> if/when the failure occurs.
> 4) Apply akpm's patch here:
> http://marc.theaimsgroup.com/?l=linux-kernel&m=108478018304305&w=2
> 5) Repeat 2,3

Nope.  Please just see if this makes the problem go away:

--- 25/fs/buffer.c~a	Mon May 17 14:28:51 2004
+++ 25-akpm/fs/buffer.c	Mon May 17 14:29:02 2004
@@ -2723,7 +2723,6 @@ int block_write_full_page(struct page *p
 	 * writes to that region are not written out to the file."
 	 */
 	kaddr = kmap_atomic(page, KM_USER0);
-	memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
 	flush_dcache_page(page);
 	kunmap_atomic(kaddr, KM_USER0);
 	return __block_write_full_page(inode, page, get_block, wbc);

_

If this patch is confirmed to fix things up, then and only then should you
bother testing the vmtruncate patch.

Thanks.
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