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Date:	Tue, 12 Aug 2014 09:29:14 +0200
From:	Manfred Spraul <>
To:	Andrew Morton <>
Cc:	LKML <>,
	Davidlohr Bueso <>,
	Michael Kerrisk <>,
	Rafael Aquini <>,
	Rik van Riel <>,,
	Manfred Spraul <>
Subject: [PATCH 0/3] ipc: Further updates to sysv/mqueue limits

Hi Andrew,

I got some positive and no negative feedback on my patches, thus:
Could you add the patches to -mm and push them towards Linus?

	- increase MSGMNI to 32000
	- as a bonus, this removes around 300 lines

	- increase all limits
	- update the documentation, it was stale

   Note: Redhat/Oracle recommend values that exceed what I would recommend
   as safe upper limits. 

   Unfortunately I didn't get any replies, thus I don't know how to proceed.

   One option would be to switch from kmalloc to ipc_alloc, then the risk of
   failing due to memory fragmentation would be resolved.

	Change the namespace code so that a new namespace inherits the values
	from it's parent instead of the boot time defaults.

	Serge Hallyn and Michael Kerrisk also consider the new approach as better.
	One thing that is a bit surprising is that clone(CLONE_NEWIPC)k

I've tested the changes both with unshare -i and with my own test apps.
Unfortunately I didn't manage to get lxc to run on my busybox test setup :-(

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