From: Manfred Spraul <manfred@colorfullife.com>
To: Solofo.Ramangalahy@bull.net
Cc: linux-kernel@vger.kernel.org, Matt Helsley <matthltc@us.ibm.com>,
Mingming Cao <cmm@us.ibm.com>,
Nadia Derbey <Nadia.Derbey@bull.net>,
Yasunori Goto <y-goto@jp.fujitsu.com>
Subject: Re: [RFC -mm 0/6] sysv ipc: scale msgmnb with the number of cpus
Date: Tue, 24 Jun 2008 20:00:21 +0200 [thread overview]
Message-ID: <48613635.70103@colorfullife.com> (raw)
In-Reply-To: <18527.41440.273383.388943@frecb006361.adech.frec.bull.fr>
Solofo.Ramangalahy@bull.net wrote:
> Humm... now this make me think that you did not change the MSGMNB
> value when you changed MSGMNI and MSGMAX.
> Maybe that was on purpose?
>
>
I was afraid that it might break user space applications that queue a
few kb of messages.
That's also the reason for
> if (msgsz + msq->q_cbytes <= msq->q_qbytes &&
> 1 + msq->q_qnum <= msq->q_qbytes) {
> break;
> }
It's possible to send 0-byte messages even if the message queue is full
[except that you can't send more than MSGMNB messages].
--
Manfred
next prev parent reply other threads:[~2008-06-24 18:00 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20080605145712.116223941@bull.net>
2008-06-07 14:38 ` [RFC -mm 0/6] sysv ipc: scale msgmnb with the number of cpus Manfred Spraul
2008-06-08 7:19 ` Solofo.Ramangalahy
2008-06-23 13:15 ` Solofo.Ramangalahy
2008-06-24 18:00 ` Manfred Spraul [this message]
2008-06-25 6:18 ` Solofo.Ramangalahy
2008-06-25 10:12 ` Nadia Derbey
2008-06-06 6:09 Solofo.Ramangalahy
2008-06-06 8:23 ` Nick Piggin
2008-06-06 10:20 ` Solofo.Ramangalahy
2008-06-10 6:56 ` Nadia Derbey
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=48613635.70103@colorfullife.com \
--to=manfred@colorfullife.com \
--cc=Nadia.Derbey@bull.net \
--cc=Solofo.Ramangalahy@bull.net \
--cc=cmm@us.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=matthltc@us.ibm.com \
--cc=y-goto@jp.fujitsu.com \
/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