From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id C49DE138873 for ; Fri, 24 Oct 2014 11:47:27 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 169FFE08AD; Fri, 24 Oct 2014 11:47:19 +0000 (UTC) Received: from mail.digimed.co.uk (82-69-83-178.dsl.in-addr.zen.co.uk [82.69.83.178]) by pigeon.gentoo.org (Postfix) with ESMTP id DE1AFE087A for ; Fri, 24 Oct 2014 11:47:15 +0000 (UTC) Received: from hactar.digimed.co.uk (hactar.digimed.co.uk [192.168.1.3]) by mail.digimed.co.uk (Postfix) with ESMTPSA id CF6782104F for ; Fri, 24 Oct 2014 12:47:14 +0100 (BST) Date: Fri, 24 Oct 2014 12:47:14 +0100 From: Neil Bothwick To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] uevent_helper on kernel 3.16.5-gentoo Message-ID: <20141024124714.319e4ec1@hactar.digimed.co.uk> In-Reply-To: <201410241237.10235.michaelkintzios@gmail.com> References: <201410241237.10235.michaelkintzios@gmail.com> Organization: Digital Media Production X-Mailer: Claws Mail 3.10.1-119-g7fbc83 (GTK+ 2.24.25; x86_64-pc-linux-gnu) X-GPG-Fingerprint: 7260 0F33 97EC 2F1E 7667 FE37 BA6E 1A97 4375 1903 Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; boundary="Sig_/iQOp6oSM+fxY+Z5nEGTgCf6"; protocol="application/pgp-signature" X-Archives-Salt: 89b94055-41fc-4821-95e6-85cd2c19fcf2 X-Archives-Hash: 32e3dd238e6d5b42ccbfcce59db7f5c3 --Sig_/iQOp6oSM+fxY+Z5nEGTgCf6 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Fri, 24 Oct 2014 12:36:44 +0100, Mick wrote: > I understand that udev needs or used to need uevent_helper, but I am > not clear if I should or should not enable this module in a new kernel > I'm rolling. Can you please advise: >=20 >=20 > CONFIG_UEVENT_HELPER: >=20 > The uevent helper program is forked by the kernel for > every uevent. > Before the switch to the netlink-based uevent source, this was > used to hook hotplug scripts into kernel device events. It > usually pointed to a shell script at /sbin/hotplug. > This should not be used today, ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > because usual systems create > many events at bootup or device discovery in a very short time > frame. One forked process per event can create so many processes > that it creates a high system load, or on smaller systems > it is known to create out-of-memory situations during bootup. It's a legacy setting, introduced so you can turn off this feature. Presumably it defaults to Y for compatibility but I've been following the advice and running without it for some time now - on desktops and servers. --=20 Neil Bothwick WinErr 004: Erroneous error - Nothing is wrong --Sig_/iQOp6oSM+fxY+Z5nEGTgCf6 Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlRKPEIACgkQum4al0N1GQM1cACgjcYNldrtZq8t9t3Rab6ZEhHp VUMAoIruu5RHrCUqzLz0LhS6C+O06MhP =Dswt -----END PGP SIGNATURE----- --Sig_/iQOp6oSM+fxY+Z5nEGTgCf6--