Re: [PATCH] oom_pardon, aka don't kill my xlock

Marcelo Tosatti
2004-09-27T15:20:47Z

On Mon, Sep 27, 2004 at 02:12:26PM +0100, Jon Masters wrote:
> Hi all,
>
> Just out of interest then...suppose we've got a loopback swap device
> and that we can extend this by creating a new file or extending
> somehow the existing one.
>
> What would be wrong with having the page reclaim algorithms use one of
> the low memory watermarks as a trigger to call in to userspace to
> extend the swap available if possible? This is probably what Microsoft
> et al do with their "Windows is extending your virtual memory, yada
> yada blah blah". Comments? Already done?

You dont to change kernel code for that - make a script to monitor
swap usage, as soon as it gets below a given watermark, you swapon
whatever swapfile you want.

Makes sense yes.