Re: agpgart: drm-populated memory types

[Thomas Hellström <thomas@tungstengraphics.com>]

Arjan van de Ven wrote:
> > A short recap why I belive the kmalloc / vmalloc construct is necessary:
> >
> > 0) The current code uses vmalloc only.
> > 1) The allocated area ranges from 4 bytes possibly up to 512 kB, depending on
> > on the size of the AGP buffer allocated.
> > 2) Large buffers are very few. Small buffers tend to be quite many. 
> >    If we continue to use vmalloc only or another page-based scheme we will
> >    waste approx one page per buffer, together with the added slowness of
> >    vmalloc. This will severely hurt applications with a lot of small
> >    texture buffers.
> >
> > Please let me know if you still consider this unacceptable.
> >     
>
> explicit use of either kmalloc/vmalloc is fine with me; I would suggest
> an 2*PAGE_SIZE cutoff for this decision
>
>   
> >  
> > In that case I suggest sticking with vmalloc for now.
> >
> > Also please let me know if there are other parths of the patch that should be
> > reworked.
> >
> > The patch that follows is against Dave's agpgart repo.
> >
> >     
> <you forgot the patch>
>
>   
Hmm.
Still struggling with git-send-email.
Now it should have arrived.

Thanks,
Thomas




-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/