Re: ext4 lock ordering patch

Aneesh Kumar K.V
2008-05-26T17:51:18Z

On Mon, May 26, 2008 at 07:34:52PM +0200, Jan Kara wrote:
> Hi Mingming,
>
> I've noticed you removed the patch reversing locking order of page lock
> and transaction start from ext4 patch queue. Was this because of that
> reported performance problem or for some other reason? As far as I've
> understood that problem has been just in the patch fixing the delalloc mode
> part so just removing that patch would be enough AFAICT.
> Anyway, the problem is I have now ordered mode rewrite for JBD2/ext4
> which depends on this patch so the question is how to proceed... Should we
> first fix that delalloc problem (are you looking into that?) or do we merge
> all the changes and then fixup the delalloc code?
>
> Honza

That was due to delalloc interaction with locking order change patches.
I am right now testing some changes for delalloc. But I still have file
system hang with fsstress. So I haven't posted the latest changes yet.

-aneesh