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SubjectRe: Memory allocation question
Rik van Riel wrote:
>
> On Wed, 21 Nov 2001, george anzinger wrote:
> > Alan Cox wrote:
> > >
> > > > size chuncks. Currently I am using kmalloc() to allocate a page at a
> > > > time. I don't want to have to worry about mapping/unmapping etc. I
> > >
> > > Use get_free_page() to get page sized chunks
> >
> > What about __get_free_page() ? I don't need or want the clear page
> > (performance issues).
>
> get_free_page() doesn't clear the page afaics.
>
In mm.h (2.4.13 kernel)....

#define __get_free_page(gfp_mask) \
__get_free_pages((gfp_mask),0)

#define __get_dma_pages(gfp_mask, order) \
__get_free_pages((gfp_mask) | GFP_DMA,(order))

/*
* The old interface name will be removed in 2.5:
*/
#define get_free_page get_zeroed_page
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Where as __get_free_page() does not zero. I know this is an old kernel,
but...


What am I missing?
--
George george@mvista.com
High-res-timers: http://sourceforge.net/projects/high-res-timers/
Real time sched: http://sourceforge.net/projects/rtsched/
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