Re: [PATCH 0/2] revert unconditional slab and page allocator fault injection calls

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To: Vlastimil Babka <vbabka@xxxxxxx>
Subject: Re: [PATCH 0/2] revert unconditional slab and page allocator fault injection calls
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Date: Thu, 11 Jul 2024 12:36:37 -0700
Cc: Mateusz Guzik <mjguzik@xxxxxxxxx>, Akinobu Mita <akinobu.mita@xxxxxxxxx>, Alexei Starovoitov <ast@xxxxxxxxxx>, Daniel Borkmann <daniel@xxxxxxxxxxxxx>, John Fastabend <john.fastabend@xxxxxxxxx>, Andrii Nakryiko <andrii@xxxxxxxxxx>, Martin KaFai Lau <martin.lau@xxxxxxxxx>, Eduard Zingerman <eddyz87@xxxxxxxxx>, Song Liu <song@xxxxxxxxxx>, Yonghong Song <yonghong.song@xxxxxxxxx>, KP Singh <kpsingh@xxxxxxxxxx>, Stanislav Fomichev <sdf@xxxxxxxxxxx>, Hao Luo <haoluo@xxxxxxxxxx>, Jiri Olsa <jolsa@xxxxxxxxxx>, Christoph Lameter <cl@xxxxxxxxx>, David Rientjes <rientjes@xxxxxxxxxx>, Roman Gushchin <roman.gushchin@xxxxxxxxx>, Hyeonggon Yoo <42.hyeyoo@xxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, bpf@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx
In-reply-to: <20240711-b4-fault-injection-reverts-v1-0-9e2651945d68@suse.cz>
References: <20240711-b4-fault-injection-reverts-v1-0-9e2651945d68@suse.cz>

On Thu, 11 Jul 2024 18:35:29 +0200 Vlastimil Babka <vbabka@xxxxxxx> wrote:

> These two patches largely revert commits that added function call
> overhead into slab and page allocation hotpaths and that cannot be
> currently disabled even though related CONFIG_ options do exist.

Five years ago.  I assume the overall overhead is small?

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  - From: Vlastimil Babka

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