linux-kernel - Re: [RFC v2] prctl: prctl(PR_SET_IDLE, PR_IDLE_MODE

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]

Message-ID: <CA+49okpufRcRD=VfjWkEi_XSc+Uyn+291Npz-K2J34f5AjFxrA@mail.gmail.com>
Date:   Sat, 18 Nov 2017 12:33:50 -0800
From:   Shawn Landden <slandden@...il.com>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, linux-api@...r.kernel.org
Subject: Re: [RFC v2] prctl: prctl(PR_SET_IDLE, PR_IDLE_MODE_KILLME), for
 stateless idle loops

On Fri, Nov 3, 2017 at 2:09 AM, Michal Hocko <mhocko@...nel.org> wrote:
> On Thu 02-11-17 23:35:44, Shawn Landden wrote:
>> 16 bytes per process is kinda spendy, but I want to keep
>> lru behavior, which mem_score_adj does not allow. When a supervisor,
>> like Android's user input is keeping track this can be done in user-space.
>> It could be pulled out of task_struct if an cross-indexing additional
>> red-black tree is added to support pid-based lookup.
>
> This is still an abuse and the patch is wrong. We really do have an API
> to use I fail to see why you do not use it.
When I looked at wait_queue_head_t it was 20 bytes.