Re: 2.5.50-mm2

[Christoph Hellwig]

On Mon, Dec 09, 2002 at 12:26:48AM -0800, Andrew Morton wrote:
> +remove-PF_SYNC.patch
> 
>  remove the current->flags:PF_SYNC abomination.  Adds a `sync' arg to
>  all writepage implementations to tell them whether they are being
>  called for memory cleansing or for data integrity.

Any chance you could pass down a struct writeback_control instead of
just the sync flag?  XFS always used ->writepage similar to the
->vm_writeback in older kernel releases because writing out more
than one page of delalloc space is really needed to be efficient and
this would allow us to get a few more hints about the VM's intentions.