From: Michal Hocko <mhocko@kernel.org>
To: Heinrich Schuchardt <xypron.glpk@gmx.de>,
Andrew Morton <akpm@linux-foundation.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: threads-max observe limits
Date: Tue, 17 Sep 2019 12:03:50 +0200 [thread overview]
Message-ID: <20190917100350.GB1872@dhcp22.suse.cz> (raw)
Hi,
I have just stmbled over 16db3d3f1170 ("kernel/sysctl.c: threads-max
observe limits") and I am really wondering what is the motivation behind
the patch. We've had a customer noticing the threads_max autoscaling
differences btween 3.12 and 4.4 kernels and wanted to override the auto
tuning from the userspace, just to find out that this is not possible.
Why do we override user admin like that? I find it quite dubious to be
honest. Especially when the auto-tunning is just a very rough estimation
and it seems quite arbitrary.
Thanks
--
Michal Hocko
SUSE Labs
next reply other threads:[~2019-09-17 10:03 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-17 10:03 Michal Hocko [this message]
2019-09-17 15:28 ` threads-max observe limits Heinrich Schuchardt
2019-09-17 15:38 ` Michal Hocko
2019-09-17 17:26 ` Eric W. Biederman
2019-09-18 7:15 ` Michal Hocko
2019-09-19 7:59 ` Michal Hocko
2019-09-19 19:38 ` Andrew Morton
2019-09-19 19:33 ` Eric W. Biederman
2019-09-22 6:58 ` Michal Hocko
2019-09-22 15:31 ` Heinrich Schuchardt
2019-09-22 21:40 ` Eric W. Biederman
2019-09-22 21:24 ` Eric W. Biederman
2019-09-23 8:08 ` Michal Hocko
2019-09-23 21:23 ` Eric W. Biederman
2019-09-24 8:48 ` Michal Hocko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190917100350.GB1872@dhcp22.suse.cz \
--to=mhocko@kernel.org \
--cc=akpm@linux-foundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=xypron.glpk@gmx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).