Re: the new VMt

Stephen C. Tweedie
2000-09-25T15:42:49Z

Hi,

On Mon, Sep 25, 2000 at 04:16:56PM +0100, Alan Cox wrote:
>
> Unless Im missing something here think about this case
>
> 2 active processes, no swap
>
> #1 #2
> kmalloc 32K kmalloc 16K
> OK OK
> kmalloc 16K kmalloc 32K
> block block
>

... and we get two wakeup_kswapd()s. kswapd has PF_MEMALLOC and so is
able to eat memory which processes #1 and #2 are not allowed to touch.
Progress is made, clean pages are discarded and dirty ones queued for
write, memory becomes free again and the world is a better place.

Or so goes the theory, at least.

--Stephen