netdev - Re: [PATCH net-next 3/3] mlxsw: core: Add support for negative temperature readout

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 PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Sun, 23 Jun 2019 18:25:37 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Vadim Pasternak <vadimp@...lanox.com>
Cc:     Ido Schimmel <idosch@...sch.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        Jiri Pirko <jiri@...lanox.com>, mlxsw <mlxsw@...lanox.com>,
        Ido Schimmel <idosch@...lanox.com>
Subject: Re: [PATCH net-next 3/3] mlxsw: core: Add support for negative
 temperature readout

> > Why the > 0?
> 
> We don't consider negative temperature for thermal control.

Is this because the thermal control is also broken and does not
support negative values? This is just a workaround papering over the
cracks?

I've worked on some systems where the thermal subsystem has controller
a heater. Mostly industrial systems, extended temperature range, and
you have to make sure the hardware is kept above -25C, otherwise the
DRAM timing goes to pot and the system crashed and froze.

	Andrew