From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752623AbdIBHQT (ORCPT ); Sat, 2 Sep 2017 03:16:19 -0400 Received: from mout.gmx.net ([212.227.15.19]:50929 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751855AbdIBHQS (ORCPT ); Sat, 2 Sep 2017 03:16:18 -0400 Message-ID: <1504336232.16793.15.camel@gmx.de> Subject: Re: [PATCH v2] sched: check user input value of sysctl_sched_time_avg From: Mike Galbraith To: Ethan Zhao , peterz@infradead.org, mingo@redhat.com, mcgrof@kernel.org, keescook@chromium.org Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, james.puthukattukaran@oracle.com, ethan.kernel@gmail.com Date: Sat, 02 Sep 2017 09:10:32 +0200 In-Reply-To: <1504335452-31806-1-git-send-email-ethan.zhao@oracle.com> References: <1504335452-31806-1-git-send-email-ethan.zhao@oracle.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.20.5 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K0:tHXua/7/8s1zL9VsZusL67KmpfoP7VPchJFsRRuJyQHgi7cO4nw u6z9KuB9jrvjycphfC4ez6oROcrq3kX2xgCXwHfwV6gzUEkafVRDqcBRcmqBEfhqp7buP+/ cGExTGxRXZkYvMuotkJW30WigHJybuf6x2fyWeDtAnIzmUzWZkQoLXB5EHVhtbeZKOO94Tx xkyF5dS0ljqLStmihpKyw== X-UI-Out-Filterresults: notjunk:1;V01:K0:Ey6oGCKiaDA=:ieLXreETphJg4EIV1A2XWp Gc5xQOwiEyw/dlp18ubvOtIO5cs0VqxoJC2Y00wg9mhwl+9pf61dXo4dpaMfbUx79ZBRP1WIS nTy6QuS/fAB2rTjfTdzqo8YftcEE5hHxp/Q3816VjaA5F7LFszMhHoXdqlv68EomMQNTlyr2t y7gnr7ZF++bUfKlD4s/CJte0bTdfCC60NWL2U0wHczILKNzg9yzjmoNAymPeE7w7LTXRZcw5A Pgk2xfBukqCd0AO8Fs0mNtwVecXIwiTZvUgEkAMvC8HaoxSRdCTe0OWdKfTO0Q9r6DPtGxq4Z 9P2rgAjuJVKqQ3wL6k51e0KWFHIdD2p5yiHm3YETaEQtl4ZJFKOudC27Stvz1/AfeuC6RCJs4 v0Do7nv1Bf74j2OpEUe38fktK/TDcRokC1yOl6nj4WKXp2XFAki637yCnlYbWYVWfv1Xc3Axe SQ/jtUG6npTUmMDrCfBDemvduzLe7AHPWhC+Nia+Ke4BGvozURXfa+GoKu9sjsqCyq/XKYXtU OMEbv8IQzkKFMx0kur/gH7PJtwphBHjtV5ARzbt0uBzCTrmY7SW/4jFpcIHK2XS2QSqMH43LP U8vBpNwUSk26IDqGdYtCJN8lyAV6z/7qp6SG9iybiyv5Z7YO3o/VfbVu0zmfj3sKJb4lta/o6 684oqSmogrC3Gqhf2ymkBzzkYIx1qdTOO6ghu8BYDdhlsm3h2h4TLDDqQDu6N560a9VRNmeHB ArRLZbp49MVoZdmt+wySo4YsEeXVlnIhuB2leXcvVBUcNDOEsz0N2my0TOaaaJCqMopQgQuOB QCGKbkGnT5JyykPkAeZo3FBQQWAIv42FXbOMDFfdiYS//FHQkI= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 2017-09-02 at 14:57 +0800, Ethan Zhao wrote: > System will hang if user set sysctl_sched_time_avg to 0 by > > [root@XXX ~]# sysctl kernel.sched_time_avg_ms=0 What's wrong with using proc_dointvec_minmax? -Mike