Re: 2.6.19 file content corruption on ext3

From: Linus Torvalds
Date: Mon Dec 18 2006 - 15:45:55 EST




On Mon, 18 Dec 2006, Linus Torvalds wrote:
>
> But at the same time, it's interesting that it still happens when we try
> to re-add the dirty bit. That would tell me that it's one of two cases:

Forget that. There's a third case, which is much more likely:

- Andrew's patch had a ", 1" where it _should_ have had a ", 0".

This should be fairly easy to test: just change every single ", 1" case in
the patch to ", 0".

The only case that _definitely_ would want ",1" is actually the case that
already calls page_mkclean() directly: clear_page_dirty_for_io(). So no
other ", 1" is valid, and that one that needed it already avoided even
calling the "test_clear_page_dirty()" function, because it did it all by
hand.

What happens for you in that case?

Linus
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