From mboxrd@z Thu Jan 1 00:00:00 1970 Reply-To: kernel-hardening@lists.openwall.com Date: Thu, 7 Apr 2016 23:14:13 +0200 From: Jesper Dangaard Brouer Message-ID: <20160407231413.53e371ff@redhat.com> In-Reply-To: References: <1459971348-81477-1-git-send-email-thgarnie@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: [kernel-hardening] Re: [RFC v1] mm: SLAB freelist randomization To: Kees Cook Cc: brouer@redhat.com, Thomas Garnier , Christoph Lameter , Pekka Enberg , David Rientjes , Joonsoo Kim , Andrew Morton , Greg Thelen , "kernel-hardening@lists.openwall.com" , LKML , Linux-MM , Laura Abbott List-ID: On Wed, 6 Apr 2016 14:45:30 -0700 Kees Cook wrote: > On Wed, Apr 6, 2016 at 12:35 PM, Thomas Garnier wrote: [...] > > re-used on slab creation for performance. > > I'd like to see some benchmark results for this so the Kconfig can > include the performance characteristics. I recommend using hackbench > and kernel build times with a before/after comparison. > It looks like it only happens on init, right? (Thus must bench tools might not be the right choice). My slab tools for benchmarking the fastpath is here: https://github.com/netoptimizer/prototype-kernel/blob/master/kernel/mm/slab_bulk_test01.c And I also carry a version of Christoph's slab bench tool: https://github.com/netoptimizer/prototype-kernel/blob/master/kernel/mm/slab_test.c -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat Author of http://www.iptv-analyzer.org LinkedIn: http://www.linkedin.com/in/brouer