linux-kernel - Re: [PATCH-next 2/5] lib/test_vmalloc.c: add a new 'nr

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Message-Id: <20210402145934.719192be298eadbeecb321d2@linux-foundation.org>
Date:   Fri, 2 Apr 2021 14:59:34 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     "Uladzislau Rezki (Sony)" <urezki@...il.com>
Cc:     linux-mm@...ck.org, LKML <linux-kernel@...r.kernel.org>,
        Hillf Danton <hdanton@...a.com>,
        Michal Hocko <mhocko@...e.com>,
        Matthew Wilcox <willy@...radead.org>,
        Oleksiy Avramchenko <oleksiy.avramchenko@...ymobile.com>,
        Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH-next 2/5] lib/test_vmalloc.c: add a new 'nr_threads'
 parameter

On Fri,  2 Apr 2021 22:22:34 +0200 "Uladzislau Rezki (Sony)" <urezki@...il.com> wrote:

> By using this parameter we can specify how many workers are
> created to perform vmalloc tests. By default it is one CPU.
> The maximum value is set to 1024.
> 
> As a result of this change a 'single_cpu_test' one becomes
> obsolete, therefore it is no longer needed.
> 

Why limit to 1024?  Maybe testers want more - what's the downside to
permitting that?

We may need to replaced that kcalloc() with kmvalloc() though...