Messages in this thread | | | Date | Mon, 27 Sep 2004 13:42:19 -0300 | From | Marcelo Tosatti <> | Subject | Re: [PATCH] oom_pardon, aka don't kill my xlock |
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On Mon, Sep 27, 2004 at 07:12:53PM +0200, Herbert Poetzl wrote: > On Mon, Sep 27, 2004 at 10:35:54AM -0300, Marcelo Tosatti wrote: > > 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. > > hmm, sounds good, but what if next 'burst' of > swapped out data is larger than the watermark?
Give the watermark a large enough value.
> I'm no friend of the 'extend swap idea' so don't > get me wrong, but userspace can just reduce the > cases where you get out-of-swap, without support > from the kernel side (via some userspace helper).
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