Messages in this thread | | | From | Con Kolivas <> | Subject | Re: swapping and the value of /proc/sys/vm/swappiness | Date | Tue, 07 Sep 2004 11:34:15 +1000 |
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Marcelo Tosatti writes:
> On Tue, Sep 07, 2004 at 09:34:20AM +1000, Con Kolivas wrote: >> Andrew Morton writes: >> >> >Con Kolivas <kernel@kolivas.org> wrote: >> >> >> >>> A scan of the change logs for swappiness related changes shows nothing >> >>that > might explain these changes. My question is: "Is this change in >> >> behavior >> >> > deliberate, or just a side effect of other changes that were made in >> >> the vm?" > and "What kind of swappiness behavior might I expect to find >> >> in future kernels?". >> >> >> >> The change was not deliberate but there have been some other people >> >> report significant changes in the swappiness behaviour as well (see >> >> archives). It has usually been of the increased swapping variety lately. >> >> It has been annoying enough to the bleeding edge desktop users for a >> >> swag of out-of-tree hacks to start appearing (like mine). >> > >> >All of which is largely wasted effort. It would be much more useful to get >> >down and identify which patch actually caused the behavioural change. >> >> I don't disagree. Is there anyone who has the time and is willing to do the >> regression testing? This is a general appeal to the mailing list. > > Hi kernel fellows, > > I volunteer. I'll try something tomorrow to compare swappiness of older kernels like > 2.6.5 and 2.6.6, which were fine on SGI's Altix tests, up to current newer kernels > (on small memory boxes of course). > > Someone needs to write a vmstat-like tool to parse /proc/vmstat. > The statistics in there allows us to watch the behaviour of VM > page reclaim code. > > Con, if you could compile a list of reports we would be very grateful.
Apart from lots of "soft" reports I've been getting, the most obvious one recently on the mailing list is this:
http://marc.theaimsgroup.com/?l=linux-kernel&m=109237941331221&w=2
and no, I'm not referring to this thread because he tried one of my patches; that's an old patch that I'm not even pushing any more.
Cheers, Con
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