Messages in this thread | | | Date | Tue, 14 Sep 2004 17:15:58 -0300 | From | Marcelo Tosatti <> | Subject | Re: swapping and the value of /proc/sys/vm/swappiness |
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On Tue, Sep 14, 2004 at 11:31:53AM -0700, Florin Andrei wrote: > On Mon, 2004-09-06 at 16:27, Andrew Morton wrote: > > Con Kolivas <kernel@kolivas.org> wrote: > > > > 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. > > >From a highly-theoretical, ivory-tower perspective, maybe; i am not the > one to pass judgement. > >From a realistic, "fix it 'cause it's performing worse than MSDOS > without a disk cache" perspective, definitely not true. > > I've found a situation where the vanilla kernel has a behaviour that > makes no sense: > > http://marc.theaimsgroup.com/?l=linux-kernel&m=109237941331221&w=2 > http://marc.theaimsgroup.com/?l=linux-kernel&m=109237959719868&w=2 > http://marc.theaimsgroup.com/?l=linux-kernel&m=109238126314192&w=2 > > A patch by Con Kolivas fixed it: > > http://marc.theaimsgroup.com/?l=linux-kernel&m=109410526607990&w=2 > > I cannot offer more details, i have no time for experiments, i just need > a system that works. The vanilla kernel does not.
Have you tried to decrease the value of /proc/sys/vm/swappiness to say 30 and see what you get?
Andrew's point is that we should identify the problem - Con's patch rewrites swapping policy.
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