Date: Wed, 28 Sep 2011 13:31:45 -0700 From: Dave Hansen <dave@...ux.vnet.ibm.com> To: Christoph Lameter <cl@...two.org> Cc: David Rientjes <rientjes@...gle.com>, Vasiliy Kulikov <segoon@...nwall.com>, kernel-hardening@...ts.openwall.com, Pekka Enberg <penberg@...nel.org>, Matt Mackall <mpm@...enic.com>, Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org, Kees Cook <kees@...ntu.com>, Valdis.Kletnieks@...edu, Linus Torvalds <torvalds@...ux-foundation.org>, Alan Cox <alan@...ux.intel.com>, linux-kernel@...r.kernel.org Subject: Re: [PATCH 2/2] mm: restrict access to /proc/meminfo On Tue, 2011-09-27 at 15:47 -0500, Christoph Lameter wrote: > On Tue, 27 Sep 2011, David Rientjes wrote: > > It'll turn into another one of our infinite number of capabilities. Does > > anything actually care about statistics at KB granularity these days? > > Changing that to MB may also break things. It may be better to have > consistent system for access control to memory management counters that > are not related to a process. We could also just _effectively_ make it output in MB: foo = foo & ~(1<<20) or align-up. We could also give the imprecise numbers to unprivileged users and let privileged ones see the page-level ones. -- Dave
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