Re: [patch][v2] swap: virtual swap readahead

Johannes Weiner
2009-06-04T10:06:51Z

On Thu, Jun 04, 2009 at 10:46:28AM +0900, KAMEZAWA Hiroyuki wrote:

> I wonder (I just wonder..) can we add code like following here ?
>
> /* we do _readahead_ here. Then, we don't want to add too much jobs to vm/IO*/
> if (swp != entry)
> gfp_mask &= ~__GFP_WAIT
> > + page = read_swap_cache_async(swp, gfp_mask, vma, pos);
>
> too slow ?

Good idea, certainly worth evaluating. But not in this patch, I don't
want to change _everything_ at once :-)

Thanks, Hannes