| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Sat, 22 Feb 2020 12:19:17 +0000
From: Anson Huang <anson.huang@....com>
To: Daniel Lezcano <daniel.lezcano@...aro.org>
CC: "robh+dt@...nel.org" <robh+dt@...nel.org>,
"mark.rutland@....com" <mark.rutland@....com>,
"shawnguo@...nel.org" <shawnguo@...nel.org>,
"s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
"kernel@...gutronix.de" <kernel@...gutronix.de>,
"festevam@...il.com" <festevam@...il.com>,
"catalin.marinas@....com" <catalin.marinas@....com>,
"will@...nel.org" <will@...nel.org>,
"rui.zhang@...el.com" <rui.zhang@...el.com>,
"amit.kucheria@...durent.com" <amit.kucheria@...durent.com>,
Aisheng Dong <aisheng.dong@....com>,
"linux@...ck-us.net" <linux@...ck-us.net>,
"srinivas.kandagatla@...aro.org" <srinivas.kandagatla@...aro.org>,
"krzk@...nel.org" <krzk@...nel.org>,
Andy Duan <fugang.duan@....com>, Peng Fan <peng.fan@....com>,
Daniel Baluta <daniel.baluta@....com>,
"bjorn.andersson@...aro.org" <bjorn.andersson@...aro.org>,
"olof@...om.net" <olof@...om.net>,
"dinguyen@...nel.org" <dinguyen@...nel.org>,
Leonard Crestez <leonard.crestez@....com>,
"marcin.juszkiewicz@...aro.org" <marcin.juszkiewicz@...aro.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH V15 RESEND 5/5] arm64: dts: imx: add i.MX8QXP thermal
support
Hi, Daniel
> Subject: Re: [PATCH V15 RESEND 5/5] arm64: dts: imx: add i.MX8QXP thermal
> support
>
> On 22/02/2020 00:53, Anson Huang wrote:
> > Hi, Daniel
> >
>
> [ ... ]
>
> >>> +
> >>> + thermal_zones: thermal-zones {
> >>> + cpu-thermal0 {
> >>> + polling-delay-passive = <250>;
> >>> + polling-delay = <2000>;
> >>> + thermal-sensors = <&tsens IMX_SC_R_SYSTEM>;
> >>> + trips {
> >>> + cpu_alert0: trip0 {
> >>> + temperature = <107000>;
> >>> + hysteresis = <2000>;
> >>> + type = "passive";
> >>> + };
> >>
> >> May be you can add a 'hot' trip point before 'critical' for future
> >> use before reaching the emergency shutdown.
> >
> > The 'passive' trip is actually the 'hot' trip point you mentioned, and
> > I have combined it to below cooling map which will throttle cpu-freq when
> passive (hot) point is reached.
> > We all use 'passive' as 'hot' alarm and trigger cpu-freq throttle on i.MX
> platforms.
>
> Sorry, I'm not sure to get the point. A 'hot' trip point is not a 'passive' trip
> point. The 'hot' trip point is a critical temperature and a notification is raised
> [1][2].
>
> It is the last chance for the system to do something before the next trip point
> 'critical' is reached and where an emergency shutdown is done.
>
> The 'passive' trip point is the target temperature for mitigation in a normal
> situation when the system is loaded.
Ah, now I understand your point, as all i.MX SoCs ONLY support passive and critical
point, and never support the notification of hot trip point, so I think it should be OK
to leave i.MX8QXP same as other i.MX SoCs, if we plan to support hot trip point notification,
I will cut another patch for all i.MX SoCs, does it make sense to you? If yes, please help
review the V16 patch set I sent out.
thanks again for review,
Anson
>
> [1]
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit.ker
> nel.org%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Ftorvalds%2Flinux.git%2F
> tree%2Fdrivers%2Fthermal%2Fthermal_core.c%23n288&data=02%7C01
> %7Canson.huang%40nxp.com%7C2a1422c3cb0f46c3b13308d7b76c198c%7C
> 686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637179547223360051&a
> mp;sdata=fRmsFbCVFdv3VwFEqp1sSHxt2rucQ33yYnnaPE5gs1g%3D&res
> erved=0
> [2]
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit.ker
> nel.org%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Ftorvalds%2Flinux.git%2F
> tree%2Fdrivers%2Fthermal%2Fthermal_core.c%23n420&data=02%7C01
> %7Canson.huang%40nxp.com%7C2a1422c3cb0f46c3b13308d7b76c198c%7C
> 686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637179547223360051&a
> mp;sdata=QEiwQcL8FZKg6Rs7y9h9XKvFf%2FlVeo20MwKTiqUbMwA%3D&am
> p;reserved=0
>
>
>
>
> --
>
> <https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.
> linaro.org%2F&data=02%7C01%7Canson.huang%40nxp.com%7C2a1422
> c3cb0f46c3b13308d7b76c198c%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C
> 0%7C0%7C637179547223360051&sdata=xT2UtNHHA826aziV1aUmPXpa
> Bnq7dBm%2FJPFG4S2%2F5qQ%3D&reserved=0> Linaro.org │ Open
> source software for ARM SoCs
>
> Follow Linaro:
> <https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.
> facebook.com%2Fpages%2FLinaro&data=02%7C01%7Canson.huang%4
> 0nxp.com%7C2a1422c3cb0f46c3b13308d7b76c198c%7C686ea1d3bc2b4c6fa9
> 2cd99c5c301635%7C0%7C0%7C637179547223360051&sdata=eSr89jm2
> Qxzpi2bX%2BN%2FchizrkF372ypyLgv5%2BuI82Ic%3D&reserved=0>
> Facebook |
> <https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Ftwitte
> r.com%2F%23!%2Flinaroorg&data=02%7C01%7Canson.huang%40nxp.c
> om%7C2a1422c3cb0f46c3b13308d7b76c198c%7C686ea1d3bc2b4c6fa92cd99
> c5c301635%7C0%7C0%7C637179547223360051&sdata=cRydP%2FJpfuD
> uZFXUivk6F4At1lc%2FsOHdSzDDnDtDOug%3D&reserved=0> Twitter |
> <https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.
> linaro.org%2Flinaro-
> blog%2F&data=02%7C01%7Canson.huang%40nxp.com%7C2a1422c3cb0
> f46c3b13308d7b76c198c%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0
> %7C637179547223360051&sdata=wlwlbrLGXt%2Fdpuvw2xpCToiAIweud
> QDvLc8x0kgJOoQ%3D&reserved=0> Blog
Powered by blists - more mailing lists