Re: [RFC 1/2] JBD: slab management support for large block(>8k)

[Christoph Hellwig]

On Mon, Sep 03, 2007 at 12:55:04AM -0700, Christoph Lameter wrote:
> On Sun, 2 Sep 2007, Christoph Hellwig wrote:
> 
> > > We are doing what you describe right now. So the current code is broken?
> > Yes.
> 
> How about getting rid of the slabs there and use kmalloc? Kmalloc in mm 
> (and therfore hopefully 2.6.24) will convert kmallocs > PAGE_SIZE to page 
> allocator calls. Not sure what to do about the 1k and 2k requests though.

The problem is that we must never use kmalloc pages, so we always need
to request a page or more for these.  Better to use get_free_page directly,
that's how I fixed it in XFS a while ago.
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