Re: [RFC][PATCH 12/16] writeback: add to bdi_list in the forkerthread

[Christoph Hellwig]

What about never removing a bdi from bdi_list?  If we have the
correct checks for dirty_io and the task there's no need to
ever remove a life bdi from the list.  Just add it in bdi_register
and remove it in bdi_unregister.

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