From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail1.windriver.com (mail1.windriver.com [147.11.146.13]) by mail.openembedded.org (Postfix) with ESMTP id 2D31D6065F for ; Fri, 16 Aug 2013 08:25:07 +0000 (UTC) Received: from ALA-HCA.corp.ad.wrs.com (ala-hca.corp.ad.wrs.com [147.11.189.40]) by mail1.windriver.com (8.14.5/8.14.3) with ESMTP id r7G8P7ft015098 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Fri, 16 Aug 2013 01:25:07 -0700 (PDT) Received: from [128.224.162.168] (128.224.162.168) by ALA-HCA.corp.ad.wrs.com (147.11.189.50) with Microsoft SMTP Server id 14.2.342.3; Fri, 16 Aug 2013 01:25:05 -0700 Message-ID: <520DE1DE.10608@windriver.com> Date: Fri, 16 Aug 2013 16:25:02 +0800 From: Rongqing Li User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130623 Thunderbird/17.0.7 MIME-Version: 1.0 To: Richard Purdie References: <02e6f25c210b0628dc4ee4482474b0e6ce5606e4.1376379182.git.rongqing.li@windriver.com> <520A82BA.2070706@linux.intel.com> <520B1595.3060909@windriver.com> <20130814065609.GQ17945@jama> <1376477217.22952.5.camel@ted> <20130814105915.GU17945@jama> <520CA4AF.4040403@windriver.com> <1376560519.17787.16.camel@phil-desktop.brightsign> <1376583837.22952.72.camel@ted> <520D0174.7030901@windriver.com> <1376607841.22952.103.camel@ted> In-Reply-To: <1376607841.22952.103.camel@ted> Cc: openembedded-core@lists.openembedded.org Subject: Re: [PATCH 1/1] sstate.bbclass: fix parallel building issue X-BeenThere: openembedded-core@lists.openembedded.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Patches and discussions about the oe-core layer List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 16 Aug 2013 08:25:07 -0000 Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit On 08/16/2013 07:04 AM, Richard Purdie wrote: > On Thu, 2013-08-15 at 11:27 -0500, Mark Hatle wrote: >> On 8/15/13 11:23 AM, Richard Purdie wrote: >>> On Thu, 2013-08-15 at 10:55 +0100, Phil Blundell wrote: >>>> On Thu, 2013-08-15 at 17:51 +0800, Rongqing Li wrote: >>>>> OK, But your issue is not related to me. >>>>> >>>>> I can reproduce my issue by two simple script. >>>> >>>> If tar is deciding that the file has "changed" just because the link >>>> count on the dentry has increased, that sounds like it is probably a bug >>>> in tar and ought to be fixed there. >>>> >>>> That said, I can't immediately think why autotools_copy_aclocal couldn't >>>> use a symlink rather than a hard link which would avoid this whole >>>> problem. If the file is in the sysroot then there should be no risk of >>>> it going away underneath its user. >>> >>> Sadly this doesn't work. We block copy a set of .m4 files from the >>> sysroot. We can be running do_configure of package A whilst package B is >>> de-installed from the sysroot and this leads to files disappearing >>> whilst they're being accessed. Its turned out to be a really awkward >>> problem to fix. >> >> Do we need some kind of a read/write lock on accessing those files. (Is this >> even something that we can do easily though the existing mechanisms?) > > It would kill performance for no good reason, been there, looked at > it... > > Cheers, > > Richard > I think reverting the below optimization maybe better than using lock commit 8c5544c2311b080bb212efb7f6b804db63e125f5 Author: Richard Purdie Date: Thu Oct 11 13:36:53 2012 +0100 scripts/cp-noerror: Try and use hardlinks if possible Since we generally have lots of copies of the directories created using this tool, use hardlinks where possible. This should save a little disk space and improve performance slightly. (From OE-Core rev: bfa11c028c2da093f7b4e6b7b1d611da90ae052f) Signed-off-by: Richard Purdie -Roy > _______________________________________________ > Openembedded-core mailing list > Openembedded-core@lists.openembedded.org > http://lists.openembedded.org/mailman/listinfo/openembedded-core > > -- Best Reagrds, Roy | RongQing Li