From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mario Smarduch Date: Mon, 11 Nov 2002 20:01:53 +0000 Subject: RE: [Linux-ia64] reader-writer livelock proble Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org David Mosberger wrote: > >>>>> On Mon, 11 Nov 2002 10:29:29 -0600, Mario Smarduch said: > > Mario> I know that on some commercial Unix systems there are ways to > Mario> cap the CPU utilization by user/group ids are there such > Mario> features/patches available on Linux? > > There are probably other patches floating around, but Process Resource > Management (PRM) for Linux is/was one approach to do just that: > > http://resourcemanagement.unixsolutions.hp.com/WaRM/prm_linux/ > > The kernel patches available from this URL are pretty old (up to > 2.4.6, as far as I could see), and I'm not sure what the future plans > for PRM on Linux are. Perhaps someone else can provide more details. > > --david I took a look and it appears pretty encouraging. I guess the final question would be - with CPU caps imposed on non-root users would that prevent a user from livelocking the system? I don't recall how long it took for the system to livelock (I erased the original email), there may be an oppertunity for livelock to develop before the PRM policies kick in. - Mario.