Re: Pagecache: find_or_create_page does not call a proper pageallocator function

From: Christoph Lameter
Date: Tue Apr 24 2007 - 13:56:56 EST

On Tue, 24 Apr 2007, Andrew Morton wrote:

> > I think that much is also true, but not where the problem lies.
> > Isn't the problem that filesystems using these block devices
> > expect their metadata to be accessible without kmap calls?
> >
> yup. wherever we dereference buffer_head.b_data we're touching
> page_address(buffer_head.b_page) without kmapping.

Yes but before we get there we will bounce pagecache pages into an area
where we do not need kmap.

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