linux-kernel - Re: [PATCH] arm64: dts: qcom: qrb2210-rb1: disable cluster power domains

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Message-ID: <CAA8EJpoBmzqxuCzAK6APtCzbaU15Uehw8BTp0SjEDSFaMo30dw@mail.gmail.com>
Date: Thu, 11 Jan 2024 15:31:11 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Konrad Dybcio <konrad.dybcio@...aro.org>
Cc: Bjorn Andersson <andersson@...nel.org>, Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: qrb2210-rb1: disable cluster power domains

On Thu, 11 Jan 2024 at 15:09, Konrad Dybcio <konrad.dybcio@...aro.org> wrote:
> On 1/11/24 03:01, Dmitry Baryshkov wrote:
> > If cluster domain idle state is enabled on the RB1, the board becomes
> > significantly less responsive. Under certain circumstances (if some of
> > the devices are disabled in kernel config) the board can even lock up.
>
> I got that $sometime ago, but can't repro now.. which devices being
> disabled would cause the hang?

It was reproducible with 6.4. without this patch. With 6.6 I can not
easily reproduce the hang, but the delays / responsiveness is easy to
reproduce. Compare for example 'ps' output with and without this
patch.

-- 
With best wishes
Dmitry