Messages in this thread |  | | | Date | Sun, 20 May 2001 03:42:18 -0300 (BRST) | | From | Rik van Riel <> | | Subject | Re: [RFC][PATCH] Re: Linux 2.4.4-ac10 |
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On Sun, 20 May 2001, Mike Galbraith wrote: > On Sat, 19 May 2001, Rik van Riel wrote: > > On Sat, 19 May 2001, Mike Galbraith wrote: > > > On Fri, 18 May 2001, Stephen C. Tweedie wrote: > > > > > > > That's the main problem with static parameters. The problem you are > > > > trying to solve is fundamentally dynamic in most cases (which is also > > > > why magic numbers tend to suck in the VM.) > > > > > > Magic numbers might be sucking some performance right now ;-) > > > > ... so you replace them with some others ... ;) > > I reused one of our base numbers to classify the severity of the > situation.. not the same as inventing new ones. (well, not quite > the same anyway.. half did come from the south fourty;)
*nod* ;)
(not that I'm saying this is bad ... it's just that I'd like to know why things work before looking at applying them)
> > > (yes, the last hunk looks out of place wrt my text. > > > > It also looks kind of bogus and geared completely towards this > > particular workload ;) > > I'm not sure why that helps. I didn't put it in as a trick or > anything though. I put it in because it didn't seem like a > good idea to ever have more cleaned pages than free pages at a > time when we're yammering for help.. so I did that and it helped. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Note that this is not the normal situation. Now think about the amount of data you'd be blowing away from the inactive_clean pages after a bit of background aging has gone on on a lightly loaded system. Not Good(tm)
regards,
Rik -- Linux MM bugzilla: http://linux-mm.org/bugzilla.shtml
Virtual memory is like a game you can't win; However, without VM there's truly nothing to lose...
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