linux-kernel - Re: [PATCH] drm/amd/powerplay/smu7_hwmgr: replace blocking delay with non-blocking

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:   Sun, 16 Jun 2019 16:43:10 +0200
From:   Yrjan Skrimstad <yrjan@...imstad.net>
To:     Alex Deucher <alexdeucher@...il.com>
Cc:     Maling list - DRI developers <dri-devel@...ts.freedesktop.org>,
        David Airlie <airlied@...ux.ie>,
        LKML <linux-kernel@...r.kernel.org>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        Alex Deucher <alexander.deucher@....com>,
        Evan Quan <evan.quan@....com>, Rex Zhu <rex.zhu@....com>,
        Christian König <christian.koenig@....com>
Subject: Re: [PATCH] drm/amd/powerplay/smu7_hwmgr: replace blocking delay
 with non-blocking

On Thu, Jun 13, 2019 at 09:57:24AM -0400, Alex Deucher wrote:
> The patch is fine and I can apply it (I don't think there are any
> restrictions on sleeping in sysfs), but this code only gets executed
> when you actually read the power status from the card (e.g., via sysfs
> or debugfs).  Presumably you have something in userspace polling one
> of those files on a regular basis?
> 
> Alex

That is an interesting observation to me. I am actually running
lm-sensors, although only every 15 seconds. I suppose that this might
be the reason this happens to me.

- Yrjan