linux-kernel - Re: [lkp] [ipc/msg] 0050ee059f: otc_kernel_qa-ts_ltp_ddt.LTP

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Date:	Wed, 17 Feb 2016 19:44:01 +0100
From:	Manfred Spraul <manfred@...orfullife.com>
To:	kernel test robot <ying.huang@...ux.intel.com>
Cc:	lkp@...org, LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rafael Aquini <aquini@...hat.com>,
	Davidlohr Bueso <dave@...olabs.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [lkp] [ipc/msg] 0050ee059f:
 otc_kernel_qa-ts_ltp_ddt.LTP_syscalls.msgctl11.fail

Hi Ying,

On 02/14/2016 07:41 AM, kernel test robot wrote:
> FYI, we noticed the below changes on
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> commit 0050ee059f7fc86b1df2527aaa14ed5dc72f9973 ("ipc/msg: increase MSGMNI, remove scaling")
>
> LTP_syscalls: msgctl11: "Not enough free pids"
>
> To reproduce:
>
>          git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
>          cd lkp-tests
>          bin/lkp install job.yaml  # job file is attached in this email
>          bin/lkp run     job.yaml
>
> Thanks,
> Ying Huang
I think this is an LTP issue:
MSGMNI is now 32k.

At least the last increase of MSGMNI also broke some ltp tests:
http://lists.linuxfoundation.org/pipermail/containers/2008-February/010087.html

Could you check if the tests works after
# echo 32 > /proc/sys/kernel/msgmni

--
     Manfred