From owner-freebsd-stable@freebsd.org Sat Feb 6 11:13:35 2016 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 4E458A9FA66 for ; Sat, 6 Feb 2016 11:13:35 +0000 (UTC) (envelope-from petefrench@ingresso.co.uk) Received: from constantine.ingresso.co.uk (constantine.ingresso.co.uk [IPv6:2a02:b90:3002:e550::3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 1B5D519EE for ; Sat, 6 Feb 2016 11:13:35 +0000 (UTC) (envelope-from petefrench@ingresso.co.uk) Received: from dilbert.london-internal.ingresso.co.uk ([10.64.50.6] helo=dilbert.ingresso.co.uk) by constantine.ingresso.co.uk with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.86 (FreeBSD)) (envelope-from ) id 1aS0ny-000CGn-OV for freebsd-stable@FreeBSD.ORG; Sat, 06 Feb 2016 11:13:30 +0000 Received: from petefrench by dilbert.ingresso.co.uk with local (Exim 4.86 (FreeBSD)) (envelope-from ) id 1aS0ny-0004Id-M2 for freebsd-stable@FreeBSD.ORG; Sat, 06 Feb 2016 11:13:30 +0000 To: freebsd-stable@FreeBSD.ORG Subject: Re: Recent -STABLE crashes out of swap at 3am every day Message-Id: From: Pete French Date: Sat, 06 Feb 2016 11:13:30 +0000 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 06 Feb 2016 11:13:35 -0000 Followgin up my own porst - I did some investigaing, and this is caused by the security scriots, which are now increasing wired pages a lot. This appears to push normal procsses out into swap until swap fills. Disabling the secuiryt scripts and the system no longer crashes. So, what changes between June last year and now which would make wired pages behave like this ? Am a bit uncomfortable with the fact that upgrading the OS makes a system go from working fine to runnng out of memory, that doesnt seem right. Did the kernel memory allocator for ZFS chnage during the last 9 months (when did it move the UMA?) -pete.