From: Manfred Spraul <manfred@colorfullife.com>
To: arvind.kan@wipro.com
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
"indou.takao" <indou.takao@jp.fujitsu.com>, rml <rml@tech9.net>,
Dave Jones <davej@suse.de>
Subject: Re: Changing SEMVMX to a tunable parameter
Date: Wed, 28 May 2003 18:15:55 +0200 [thread overview]
Message-ID: <3ED4E0BB.2080603@colorfullife.com> (raw)
In-Reply-To: <3ED4C6B6.7050806@wipro.com>
Arvind Kandhare wrote:
>
> >>How?
> > > SEMVMX is right now 32k, because the value is stored in an signed
> > > short,
> > > both internally and in the SuSv2 ABI.
>
>
> semval is a part of struct sem and it is an integer as of now (2.5.69).
> That is, it doesn't comply with SuS v3 as far as data type is concerned.
>
> SuS v3 specifies semval to be an unsigned short.i.e. we can have a
> maximum of 64K on this.
Ok, thus you want to increase it from 32k to 64k, but not beyond, correct?
You'd have to check that there are no hidden signed/unsigned assumptions
in ipc/sem.c
>
> Irrespective of the maximum value, an option to tune this limit would be
> highly desirable.
_If_ there are no signed/unsigned problems and if Oracle wants 64K, then
I would increase SEMVMX to 64K, without making it tunable. Dito for SEMAEM.
--
Manfred
next prev parent reply other threads:[~2003-05-28 16:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-28 14:24 Changing SEMVMX to a tunable parameter Arvind Kandhare
2003-05-28 16:15 ` Manfred Spraul [this message]
2003-05-29 10:17 ` Arvind Kandhare
2003-05-29 10:34 ` William Lee Irwin III
2003-05-29 10:36 ` Manfred Spraul
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=3ED4E0BB.2080603@colorfullife.com \
--to=manfred@colorfullife.com \
--cc=arvind.kan@wipro.com \
--cc=davej@suse.de \
--cc=indou.takao@jp.fujitsu.com \
--cc=linux-kernel@vger.kernel.org \
--cc=rml@tech9.net \
/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