linux-kernel - Re: [PATCH 3/3] selftests: Set overcommit_policy as OVERCOMMIT

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Message-ID: <b68705c8-df85-6b45-091b-3975a89b796e@arm.com>
Date:   Mon, 20 Mar 2023 12:17:59 +0530
From:   Chaitanya S Prakash <chaitanyas.prakash@....com>
To:     David Hildenbrand <david@...hat.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Shuah Khan <shuah@...nel.org>, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH 3/3] selftests: Set overcommit_policy as OVERCOMMIT_ALWAYS



On 3/16/23 21:01, David Hildenbrand wrote:
> On 14.03.23 05:23, Chaitanya S Prakash wrote:
>> The kernel's default behaviour is to obstruct the allocation of high
>> virtual address as it handles memory overcommit in a heuristic manner.
>> Setting the parameter as OVERCOMMIT_ALWAYS, ensures kernel isn't
>> susceptible to the availability of a platform's physical memory when
>> denying a memory allocation request.
> 
> Which tests in particular require that?

This is applicable to the virtual address range selftest.

> 
> Subjects should start with "selftests/mm" instead of more generic 
> "selftests:"

I'll make the necessary changes.
>