Re: per-bdi-throttling: synchronous writepage doesn't workcorrectly

[Miklos Szeredi]

> The page not having PG_writeback set on return is a hint, but not fool
> proof, it could be the device is just blazing fast.

Hmm, does it actually has to be foolproof though?  What will happen if
bdi_writeout_inc() is called twice for the page?  The device will get
twice the number of pages it deserves?  That's not all that bad,
especially since that is a really really fast device.

Miklos
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