Re: [PATCH 01/19] fs: switch bdev inode bdi's correctly

[Christoph Hellwig]

On Sat, Oct 16, 2010 at 07:13:55PM +1100, Dave Chinner wrote:
> From: Dave Chinner <dchinner@xxxxxxxxxx>
> 
> bdev inodes can remain dirty even after their last close. Hence the
> BDI associated with the bdev->inode gets modified duringthe last
> close to point to the default BDI. However, the bdev inode still
> needs to be moved to the dirty lists of the new BDI, otherwise it
> will corrupt the writeback list is was left on.
> 
> Add a new function bdev_inode_switch_bdi() to move all the bdi state
> from the old bdi to the new one safely. This is only a temporary
> measure until the bdev inode<->bdi lifecycle problems are sorted
> out.

Ok for now, I really hope my progress on sorting out the bdi mess
will eventually get rid of this.

Reviewed-by: Christoph Hellwig <hch@xxxxxx>
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