linux-kernel - Re: [PATCH] selinux: Make avc cache slot size configurable during boot

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Message-ID: <20250908071925.294803-1-zhanghongru@xiaomi.com>
Date: Mon,  8 Sep 2025 15:19:22 +0800
From: Hongru Zhang <zhanghongru06@...il.com>
To: paul@...l-moore.com
Cc: linux-kernel@...r.kernel.org,
	omosnace@...hat.com,
	selinux@...r.kernel.org,
	stephen.smalley.work@...il.com,
	zhanghongru06@...il.com,
	zhanghongru@...omi.com
Subject: Re: [PATCH] selinux: Make avc cache slot size configurable during boot

Apologies for the late reply, I sent the patch before leaving work on
Friday, and didn't check email all weekend.

> On Fri, Sep 5, 2025 at 6:05 AM Hongru Zhang <zhanghongru06@...il.com> wrote:
> >
> > From: Hongru Zhang <zhanghongru@...omi.com>
> >
> > On mobile device high-load situations ...
>
> What are you using for a SELinux policy?

Android app smoothness test, testing metrics can quantify app smoothness
from the user's perspective. The problem is also reproducible in
cold-start test scenarios. These two are widely used testing model.

I generate a flamegraph to record the sources of permission check:
url: https://gist.github.com/zhr250/9f4415bfdefc8ff0d64e78d96351fffb