Bug#695182: [RFC] Reproducible OOM with just a few sleeps
Dear Sedat,
> ... it really makes sense to switch to x86_64
> (amd64) architecture when you have a modern computer.
> Switching makes even more sense when you have more than 4GiB RAM.
You seem to say that one should switch to amd64 (if hardware allows),
even with less than 4GB RAM (where 32-bit non-PAE HIGHMEM4G kernel would
work fine), and that one should definitely switch with over 4GB RAM.
There would be no need or use for PAE kernels, which should be dropped.
I think I agree.
Thanks, Paul
Paul Szabo psz@maths.usyd.edu.au http://www.maths.usyd.edu.au/u/psz/
School of Mathematics and Statistics University of Sydney Australia
---
Quoting in full for the benefit of 695182@bugs.debian.org :
> From sedat.dilek@gmail.com Tue Jan 15 21:26:14 2013
> Date: Tue, 15 Jan 2013 11:25:41 +0100
> Subject: Re: [RFC] Reproducible OOM with just a few sleeps
> From: Sedat Dilek <sedat.dilek@gmail.com>
> To: paul.szabo@sydney.edu.au, Paul Szabo <psz@maths.usyd.edu.au>
> Cc: LKML <linux-kernel@vger.kernel.org>, linux-mm <linux-mm@kvack.org>,
> Ben Hutchings <ben@decadent.org.uk>
>
> Hi Paul,
>
> I followed a bit the thread you started in [1].
>
> As you might know i386 got eliminated in Linux-3.8.
>
> I had several discussions with the Debian kernel-team about the iN86
> (N=4..6) and PAE kernel-flavours.
> On the one hand I can understand the reduction of linux-images
> especially for iN86.
> Even i486 is a bit unfirm as there is no much hardware around, but
> Debian will keep i486 for a while (release maintenance).
>
> Topic PAE:
> Unfortunately, I had a notebook with a Intel Centrino Banias CPU (no
> PAE) which should use the -486 kernel-flavour due to the Debian
> kernel-team.
> I played with some different kernel-setup which did not give me more
> benefit (openssl benchmarks etc.)
> The -686-pae kernel did run on my hardware, but as known with all the
> SMP-NO-OPs.
>
> Depending on the hardware, it really makes sense to switch to x86_64
> (amd64) architecture when you have a modern computer.
> Switching makes even more sense when you have more than 4GiB RAM.
> IMHO using a -686-amd64 Debian kernel makes ZERO sense, real 64-Bit or die!
>
> I switched to 64-bit... and I switched from Debian/sid to
> Ubuntu/precise as well :-).
> ( NOTE: I am working here since April 2012 in a WUBI environment (no
> native Ubuntu Linux) :-). )
>
> And I am building my kernels by myself.
> So I know very well whom to blame :-).
>
> Some last words: I had several fruitful or fruitless discussions with
> the Debian kernel-team, but I can confirm (with all my heart) this
> team makes a fantastic job.
> I can recommend you Ben's blog (recently I read a series about news in
> the Debian/wheezy kernel) if your world is Debian or Ubuntu (Debian !=
> Ubuntu).
>
> Just my 0.02EUR (no British pound, here as well: when you are a member
> of the EU chose EUR not pound!).
>
> Regards,
> - Sedat -
>
>
> [1] http://marc.info/?t=135796172200001&r=1&w=2
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