Re: [PATCH 1/5] Forking ext4 filesystem from ext3 filesystem

[Jeff Garzik]

Badari Pulavarty wrote:
> Andrew Morton wrote:
> > Also, JBD is presently feeding into submit_bh() buffer_heads which 
> > span two
> > machine pages, and some device drivers spit the dummy.  It'd be better to
> > fix that once, rather than twice..    
> Andrew,
>
> I looked at this few days ago. I am not sure how we end up having 
> multiple pages (especially,
> why we end up having buffers with bh_size > pagesize) ? Do you know why ?
>
> Easiest fix would be to fix submit_bh() to deal with multiple vecs - 
> which is vetoed by
> Jens and I agree with him :(

Yep.  The sooner we kill buffer heads and use submit_bio(), the better :)

	Jeff



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