linux-kernel - Re: [PATCH] nvme-pci: Add sleep quirk for Samsung 990 Evo

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: Tue, 2 Apr 2024 15:16:58 +0200
From: Christoph Hellwig <hch@....de>
To: Werner Sembach <wse@...edocomputers.com>
Cc: Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...nel.dk>,
	Christoph Hellwig <hch@....de>, Sagi Grimberg <sagi@...mberg.me>,
	Georg Gottleuber <ggo@...edocomputers.com>,
	linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nvme-pci: Add sleep quirk for Samsung 990 Evo

On Thu, Mar 28, 2024 at 02:09:22PM +0100, Werner Sembach wrote:
> From: Georg Gottleuber <ggo@...edocomputers.com>
> 
> On some TUXEDO platforms, a Samsung 990 Evo NVMe leads to a high
> power consumption in s2idle sleep (2-3 watts).
> 
> This patch applies 'Force No Simple Suspend' quirk to achieve a
> sleep with a lower power consumption, typically around 0.5 watts.

Does this only apply to a specific SSD or all SSDs on this platform?
How do these platforms even get into the conditional?  Probably
through acpi_storage_d3 setting, which probably is set incorrectly
for the platform?  Any chance to just fix that?