Re: [uml-user] About the hanging host: Something quite strange noticed...

[BlaisorBlade <bla...@ya...>]

Alle 17:14, mercoled=EC 9 giugno 2004, Riccardo Losselli ha scritto:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi, it's me again...
> I've noticed quite a strange thing.. this is a "free" launched on the hos=
t:
>
> hostxxx:~# free
> ~             total       used       free     shared    buffers     cached
> Mem:       2068596    2019692      48904          0      19556    1721472
> - -/+ buffers/cache:     278664    1789932
> Swap:       425592     425592          0
>
> If i swapoff -a and then swapon -a
>
> hostxxxx:~# free
> ~             total       used       free     shared    buffers     cached
> Mem:       2068596    2017876      50720          0      10364    1910388
> - -/+ buffers/cache:      97124    1971472
> Swap:       425592          0     425592
>
>
>
> I didn't use the dev/anon patch as i've understood that there's a data
> lost risk, correct me if i'm wrong...
> The host is running with the ska patch installed and /tmp is
> tmpfs /tmp tmpfs defaults,size=3D7168M 0 0
>
> Isn't it quite strange that the system uses so much swap space, when in
> fact it isn't needed?

Well, the really strange thing is another one. There are several reports (e=
ven=20
from me) that the SKAS patch for 2.6.x and 2.4.25 onwards leaks kernel=20
memory; if in cat /proc/slabinfo the size-4096 rows shows an increasing=20
number of objects (see man slabinfo about the format), then you have that=20
problem, and maybe the host goes OOM (and it cannot reclaim kernel memory):=
=20
so maybe this is the reason of your hangs. But I just checked you used olde=
r=20
host, and nobody complained about them (yet).

Bye
=2D-=20
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729