From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: md/raid1:!conf->r1buf_pool is unlikely in function sync_request. Date: Mon, 2 Apr 2012 11:00:25 +1000 Message-ID: <20120402110025.3b2a112f@notabene.brown> References: <201203281924252189178@gmail.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/5Dk7nrHGbuXLLbnb9gZzu9O"; protocol="application/pgp-signature" Return-path: In-Reply-To: <201203281924252189178@gmail.com> Sender: linux-raid-owner@vger.kernel.org To: majianpeng Cc: linux-raid List-Id: linux-raid.ids --Sig_/5Dk7nrHGbuXLLbnb9gZzu9O Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Wed, 28 Mar 2012 19:24:29 +0800 "majianpeng" wrot= e: > >From 7f9446682f64e28106dd52cd12bdf74a19fb4015 Mon Sep 17 00:00:00 2001 > From: majianpeng > Date: Wed, 28 Mar 2012 19:20:07 +0800 > Subject: [PATCH] md/raid1:!conf->r1buf_pool is unlikely in function > sync_request. >=20 >=20 > Signed-off-by: majianpeng > --- > drivers/md/raid1.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) >=20 > diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c > index 4a40a20..943b3b3 100644 > --- a/drivers/md/raid1.c > +++ b/drivers/md/raid1.c > @@ -2246,7 +2246,7 @@ static sector_t sync_request(struct mddev *mddev, s= ector_t sector_nr, int *skipp > int good_sectors =3D RESYNC_SECTORS; > int min_bad =3D 0; /* number of sectors that are bad in all devices */ > =20 > - if (!conf->r1buf_pool) > + if (unlikely(!conf->r1buf_pool)) > if (init_resync(conf)) > return 0; > =20 Hi, I'm really happy that you are reviewing the md patches and even finding so= me bugs. However I find the stream of occasional tiny patches somewhat distracting. Also I find micro-optimisation like this fairly pointless. You should only really use unlikely() when it will make a real difference to performance, and this change won't So I won't apply this patch. I'll keep looking though the others you have sent since but in future I would prefer it if you collected together little patches like this and send them as a group. If and when you find genuine bugs, feel free to send them straight away. Thanks, NeilBrown --Sig_/5Dk7nrHGbuXLLbnb9gZzu9O Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (GNU/Linux) iQIVAwUBT3j6KTnsnt1WYoG5AQKHfhAAiCfbsA+HjRc7XEY9Om5HLjg59SpgHQne S9disRhS+VhGkQuytKQ5Mr1n+YaQ1DqmwnuqS9Ivv/O1ISezyX27b5I74WPgKRnQ DojQXh/9iORnYUYgXjpW0d+IYIm783VG5Xy2Zo1SctjXmNDuhzTGp4x2iyRkPEaK WKBQdBSspfSQp7UQg0RmJq8Lrf3gnR5U4W1OpeE12Put+1yEW7Knoos2hfqvt75m SKwynotnAibsCplOFJjraPG7vU0Lvbvq8jJ4yc1Rs6cCriWg4Yz/zBagoyJ6NIw4 10KsZNhugeqV/uht67j2zvQkoNXOU0M/5CWHFqIgRtBzZn8bIV1T+yjODuyNDL/F g16i+KCMCeFzY8hZozp8AvMOXn+flp9/UpbngO1DtMib/HYlxjDs6FoSr/bash1o XiejP5v69T31Gwoa/hv3bs7bkv+tzbqB4DJ7nD6gUAlGPdLSar1a6/RFjfKuuZ+R Qcvao30QDhVrZiNUajibeQRNsM0EJKq4GHNbf5nOCk9QOjcT506Dy3p435DdIiOn oEj/ErkS1yx/8f5oql38ArRJbs3xoVz7JRvl8vmjdDU566M4Uxm0LlGeFSW7QeQS x6UM3MsmsUDyzcBunzH0EiLmMU+xnlXZ2NC5cMokc9FMB6HLpiuxJWreQ9dryBCv qqecy4VOygQ= =eKno -----END PGP SIGNATURE----- --Sig_/5Dk7nrHGbuXLLbnb9gZzu9O--