From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755990AbaEPHsP (ORCPT ); Fri, 16 May 2014 03:48:15 -0400 Received: from casper.infradead.org ([85.118.1.10]:36966 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755333AbaEPHsO (ORCPT ); Fri, 16 May 2014 03:48:14 -0400 Date: Fri, 16 May 2014 09:48:04 +0200 From: Peter Zijlstra To: Michael wang Cc: Rik van Riel , LKML , Ingo Molnar , Mike Galbraith , Alex Shi , Paul Turner , Mel Gorman , Daniel Lezcano Subject: Re: [ISSUE] sched/cgroup: Does cpu-cgroup still works fine nowadays? Message-ID: <20140516074804.GK11096@twins.programming.kicks-ass.net> References: <20140513142328.GE2485@laptop.programming.kicks-ass.net> <53731D12.7040804@linux.vnet.ibm.com> <20140514094426.GF30445@twins.programming.kicks-ass.net> <5374387E.4080802@linux.vnet.ibm.com> <20140515083531.GE30445@twins.programming.kicks-ass.net> <53747EE4.3020605@linux.vnet.ibm.com> <20140515090638.GI30445@twins.programming.kicks-ass.net> <53748A5D.6070605@linux.vnet.ibm.com> <20140515115751.GK30445@twins.programming.kicks-ass.net> <5375768F.1010000@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="doRsZBpDQ+I4/+/t" Content-Disposition: inline In-Reply-To: <5375768F.1010000@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --doRsZBpDQ+I4/+/t Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, May 16, 2014 at 10:23:11AM +0800, Michael wang wrote: > On 05/15/2014 07:57 PM, Peter Zijlstra wrote: > [snip] > >> > >> It's like: > >> > >> /cgroup/cpu/l1/l2/l3/l4/l5/l6/A > >> > >> about level 7, the issue can not be solved any more. > >=20 > > That's pretty retarded and yeah, that's way past the point where things > > make sense. You might be lucky and have l1-5 as empty/pointless > > hierarchy so the effective depth is less and then things will work, but > > *shees*.. >=20 > Exactly, that's the simulation of cgroup topology setup by libvirt, > really doesn't make sense... rather torture than deployment, but they do > make things like that... I'm calling it broken and unfit for purpose if it does crazy shit like that. There's really not much we can do to fix it either, barring softfloat in the load-balancer and I'm sure everybody but virt wankers will complain about _that_. --doRsZBpDQ+I4/+/t Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAEBAgAGBQJTdcK0AAoJEHZH4aRLwOS6LMsP/jJBZTfPRr4NUEXCks0aemCU dtqK+n6hGy02clUPIL0peE2/ptIZvHJizg9B21aTKJKOBna8q9FxbkUTW177HLdt zUNCvjBw/VopPacBOpWNuhowP48AlTzx/ftKIE7tiGyIdJt+c8acHDQRKUV491WP fQfFS3Ge59Oc2XuT023+rNPJ9MgnKOG3OUPip2eLPbztEJVXpBVKX/NXg+97vTRG vuRG+nV1Gh7t5Sz64jrCCLcAUQvJnT5QoFnpPt7iGRlJ2ybOcls5TTVtTY7WV4fs 3EDpWPK6FJDny3JgH6DLaqos4R2tUd8hWW/BJKtBOYsfYfXgqJPq7B/8RRkq7lsn iPPTZTh/au4YU8xN6sDK4Hga9YHZDxLi0Y38UNZ3YZRy8OewIK8Gs40OKvkxQ004 OlX6kwCy7koLF+w2d8dQpC8z8EnxutBCXVNa4jnxOGRK9kI5Dg85CEvadawKvCfS GCMtPDJ3kgNJNFp3HnnOP/Ou3katSI5qvObYTSHZs1JtB4cBOcFKC5gSPv4u4Dxg 8InsUDsAz9TbjjF9aLgzQlg7aUgCNP1PbkCrU1VmART7D9McF0dN+vy51wz6Z0tP mSe7OMA/shNAC0eq5tD0863iUF6eB58pAFeFI7TUpZmkw4UbIJsG0G1HPTBDWNyz qCXJUaWPxC8lBKuS7HzD =W2Af -----END PGP SIGNATURE----- --doRsZBpDQ+I4/+/t--