[Bug 12579] ext4 filesystem hang

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http://bugzilla.kernel.org/show_bug.cgi?id=12579





------- Comment #10 from tytso@mit.edu  2009-02-13 18:07 -------
> Patch from Aneesh, un-whitespace-mangled.
> 
> Ted, can you push this out?  Works great.  :) We might want to ask
> the other reporter of something similar (next-20090206: deadlock on
> ext4) to test it too.  I'll ping him.

Do we completely understand the root cause, in terms of which commit
broken the mm/page-writeback.c code we were depending on?  And if so,
what of the code in mm/page-writeback.c?  Does anyone else use it?
Can anyone sanely use it?

And am I right in assuming that this only applies to 2.6.29-rcX
kernels, and is not needed for 2.6.28 or earlier kernels?

I hadn't yet pushed it out because I needed time to understand all of
these issues, hence these questions....

                                                - Ted


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