linux-kernel - Re: Do we really need SLOB nowdays?

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Message-ID: <20211028100414.GA2928@kvm.asia-northeast3-a.c.our-ratio-313919.internal>
Date:   Thu, 28 Oct 2021 10:04:14 +0000
From:   Hyeonggon Yoo <42.hyeyoo@...il.com>
To:     Christoph Lameter <cl@...two.de>
Cc:     Matthew Wilcox <willy@...radead.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>
Subject: Re: Do we really need SLOB nowdays?

On Mon, Oct 25, 2021 at 10:17:08AM +0200, Christoph Lameter wrote:
> On Mon, 18 Oct 2021, Hyeonggon Yoo wrote:
> 
> > > Better for what use case?  SLOB is for machines with 1-16MB of RAM.
> > >
> >
> > 1~16M is smaller than I thought. Hmm... I'm going to see how it works on
> > tiny configuration. Thank you Matthew!
> 
> Is there any reference where we can see such a configuration? Sure it does
> not work with SLUB too?

I thought why Matthew said "SLOB is for machines with 1-16MB of RAM"
is because if memory is so low, then it is sensitive to memory usage.

(But I still have doubt if we can run linux on machines like that.)