Re: [OT] No Swap. Re: [BUG 2.6.90-test5] kernel shits itself with48mb ram under moderate load

[Ihar 'Philips' Filipau]

Roger Luethi wrote:
> On Sat, 27 Sep 2003 20:13:48 +0200, Ihar 'Philips' Filipau wrote:
>
> > Roger Luethi wrote:
> >
> > > On Sun, 28 Sep 2003 01:26:34 +1000, Jason Lewis wrote:
> > >
> > > > 0 12      0   3424    816   6008    0    0 19712     0 5519  3184  0 12  
> > > > 0 87
> > >
> > >         ^^^^
> > > Looks like you don't have swap enabled. Are successful 2.4 runs with or
> > > without swap?
> >
> >   I'm running RH stock 2.4.20-20.9 without swap for around month.
> >   OOo, Mozilla, eDonkey & heaps of xterms. Even evaluation of VMware 
> > with Win2K inside was Ok.
> >   On average: much better experience.
>
> Better than with swap? Or better than 2.6?

  Better than with swap. This is production workstation - I cannot test 
something on it :-(

> > $ free
> >             total       used       free     shared    buffers     cached
> > Mem:        513872     507128       6744          0      32784     341404
>
> The initial post was about a 48 MB machine. 10% of what you have. The
> poster's system is paging like crazy -- since all dirty pages without a
> mapping are pinned in memory, it must shuffle around the rest.

   Sorry, I even marked $subject as [OT].
   I'm answering the question '2.4 without swap' - Yes. It is. Works. 
No  problems.

   <rant>'Paging like crazy' became for me a synonym of Linux. It 
doesn't matter how much memory you have. Less == worse. Developers 
stopped testing VMM regression on low-memory computers long time ago. 
<sarcasm>We have now fashion for clusters and numas. And a lot of swap 
on very fast raids. <sarcasm size=+100%>After all it is cheap. Just 
couple of thousands greenbacks. </sarcasm> </sarcasm> It was really 
funny when developers on LKML were sugesting to buy another hdd for 
swap. Very funny.</rant>

   Unfortunately I'm not a specialist in VMM...
   As I see there is not that much edge case testing going around.

--
Ihar 'Philips' Filipau  / with best regards from Saarbruecken.
--
  "... and for $64000 question, could you get yourself vaguely
     familiar with the notion of on-topic posting?"
				-- Al Viro @ LKML

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