Re: 2.6.28-rc8 big regression in VM

[Bill Davidsen]

KVMWu Fengguang wrote:
> On Sat, Dec 13, 2008 at 11:58:15AM +0200, Lukas Hejtmanek wrote:
> > On Sat, Dec 13, 2008 at 09:21:15AM +0800, Wu Fengguang wrote:
> > > I cannot reproduce it on 2.6.28-rc7, compiling 2.6.28-rc8...
> > >
> > > # free; echo 3 > /proc/sys/vm/drop_caches; free
> > >              total       used       free     shared    buffers     cached
> > > Mem:          1940        109       1831          0          0         42
> > > -/+ buffers/cache:         66       1873
> > > Swap:            0          0          0
> > >              total       used       free     shared    buffers     cached
> > > Mem:          1940         62       1877          0          0          7
> > > -/+ buffers/cache:         55       1884
> > > Swap:            0          0          0
> > >
> > > > once the whole memory is eaten by the cache, the system is pretty unusable.
> > > What's your kconfig?
> > attached.
>
> OK I'll try it. I cannot produce the bug in my -rc8 configuration yet:
>
> # free; echo 3 > /proc/sys/vm/drop_caches; free
>              total       used       free     shared    buffers     cached
> Mem:          1940        906       1033          0          0        761
> -/+ buffers/cache:        144       1795
> Swap:            0          0          0
>              total       used       free     shared    buffers     cached
> Mem:          1940        147       1793          0          0         19
> -/+ buffers/cache:        127       1813
> Swap:            0          0          0

Could the problem be related to him running 2GB memory and you running... well, 
maybe a patches version of "free?" Or can you really run in 2MB, or am I misreading?

--
Bill Davidsen <davidsen@xxxxxxx>
  "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot

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