Re: [PATCH] block: detach bdev inode from its wb in __blkdev_put()

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Hello, Christoph.

On Sun, Nov 22, 2015 at 04:02:16PM +0100, Christoph Hellwig wrote:
> The right fix is to never point from the inode to a BDI.  I fixed this
> with a lot of effort, and the BDI writeback series put it back a little
> later.  We need to revert that damage (not neseccarily literally, but the
> effect).

Can you please explain a bit more why inode pointing to its associated
bdi_writeback is a bad idea?  The only alternative would be recording
a key and looking up each time.  We sure can do that but I don't get
why we would want to.

Thanks.

-- 
tejun
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