Re: 2.6.10: SPARC64 mapped figure goes unsignedly negative...

From: Nix
Date: Mon Jan 31 2005 - 12:35:10 EST


On Mon, 31 Jan 2005, Hugh Dickins uttered the following:
> On Mon, 31 Jan 2005, Nix wrote:
>> Filename Type Size Used Priority
>> /dev/sda2 partition 523016 0 1
>> /dev/sda4 partition 511232 57648 2
>> /dev/sdb2 partition 523016 0 1
>>
>> Is the problem that the higher-priority kicking out to swap which should
>> happen when memory is tight, won't?
>
> I had thought that it was any kicking out to swap - apart from kicking
> tmpfs/shmem pages to swap, which should happen independently of Mapped.
>
> If you're not using tmpfs or shmem, then I'm surprised by that figure.

Oh. Yes, tmpfs might just about explain it:

58320 /tmp

So it looks like I have a swap-free box for a time. I guess I'd better
be careful... :)

> There was 88 kB out to swap in your original /proc/meminfo, which we
> may suppose was before Mapped went negative; but above shows more since.

Yes, I expect so. It must've gone negative really rather early: and note
that it's some distance below 2^64 by now, so it's still falling. If I
wait for a billion years or so it might wrap around. :)

--
`Blish is clearly in love with language. Unfortunately,
language dislikes him intensely.' --- Russ Allbery
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