From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932570AbdECULZ convert rfc822-to-8bit (ORCPT ); Wed, 3 May 2017 16:11:25 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39300 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754630AbdECULV (ORCPT ); Wed, 3 May 2017 16:11:21 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 391BB3D948 Authentication-Results: ext-mx06.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx06.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=dhowells@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 391BB3D948 Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <1493837027.22125.17.camel@perches.com> References: <1493837027.22125.17.camel@perches.com> <1493835998.22125.15.camel@perches.com> <149382747487.30481.15428192741961545429.stgit@warthog.procyon.org.uk> <149382749941.30481.11685229083280551867.stgit@warthog.procyon.org.uk> <1493835238.3180.7.camel@poochiereds.net> <4597.1493836661@warthog.procyon.org.uk> To: Joe Perches Cc: dhowells@redhat.com, Jeff Layton , viro@zeniv.linux.org.uk, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, mszeredi@redhat.com Subject: Re: [PATCH 3/9] VFS: Introduce a mount context MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <6012.1493842277.1@warthog.procyon.org.uk> Content-Transfer-Encoding: 8BIT Date: Wed, 03 May 2017 21:11:17 +0100 Message-ID: <6013.1493842277@warthog.procyon.org.uk> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Wed, 03 May 2017 20:11:20 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Joe Perches wrote: > > > krealloc would probably be more efficient and possible > > > readable as likely there's already padding in the original > > > allocation. > > > > The problem is if krealloc() fails: you've lost all those pointers to things > > you then need to free. > > Huh? How could that happen? > > krealloc must always use a temporary. > If krealloc returns NULL, the original allocation is kept. Hmmm... Good point. David