linux-kernel - RE: [PATCH] cpuidle: avoid singing capacitors

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

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

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

Date:	Mon, 3 Mar 2008 14:04:06 -0800
From:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
To:	"Pierre Ossman" <drzeus-list@...eus.cx>
Cc:	"Pavel Machek" <pavel@....cz>, "Adam Belay" <abelay@...ell.com>,
	<linux-pm@...ts.linux-foundation.org>,
	"LKML" <linux-kernel@...r.kernel.org>,
	"Andi Kleen" <andi@...stfloor.org>,
	"Lee Revell" <rlrevell@...-job.com>
Subject: RE: [PATCH] cpuidle: avoid singing capacitors

 

>-----Original Message-----
>From: Pierre Ossman [mailto:drzeus-list@...eus.cx] 
>Sent: Monday, March 03, 2008 1:18 PM
>To: Pallipadi, Venkatesh
>Cc: Pavel Machek; Adam Belay; 
>linux-pm@...ts.linux-foundation.org; LKML; Andi Kleen; Lee Revell
>Subject: Re: [PATCH] cpuidle: avoid singing capacitors
>
>On Mon, 3 Mar 2008 13:14:28 -0800
>"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com> wrote:
>
>> 
>> I prefer leaving it off my default and enabling it on faulty 
>hardware by
>> some blacklist.
>> 
>
>But are these kind of shoddy components really trackable by 
>model? I'd suspect it has more to do with the shipment of 
>parts the day when the computer was manufactured.
>

But, with this patch:
- we are penalizing good hardware and making them less power efficient
to match the bad ones.
- There may also be server systems which first may not have these sort
of power fluctuations and even when buggy and have this noise, system
may be in some corner of some lab with fans making more noise than the
capacitors.

Thanks,
Venki
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/