Date: Wed, 15 Nov 2017 19:05:11 -0500 From: Ed Maste <emaste@freebsd.org> To: rgrimes@freebsd.org Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r325860 - head/sbin/newfs Message-ID: <CAPyFy2BMDoA%2Bs76ddyNBYo1iC7TZq99_MNZi%2BmHFV6iAgQxgbQ@mail.gmail.com> In-Reply-To: <201711151847.vAFIlGD9052509@pdx.rh.CN85.dnsmgr.net> References: <201711151840.vAFIefKV002185@repo.freebsd.org> <201711151847.vAFIlGD9052509@pdx.rh.CN85.dnsmgr.net>
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On 15 November 2017 at 13:47, Rodney W. Grimes <freebsd@pdx.rh.cn85.dnsmgr.net> wrote: >> Author: emaste >> Date: Wed Nov 15 18:40:40 2017 >> New Revision: 325860 >> URL: https://svnweb.freebsd.org/changeset/base/325860 >> >> Log: >> newfs: warn if newer than kernel >> >> Creating a UFS filesystem with a newfs newer than the running kernel, >> and then mounting that filesystem, can lead to interesting failures. >> >> Add a safety belt to explicitly warn when newfs is newer than the >> running kernel. > > You should probably make the warning if (newer || older) as > either is likely to have interesting side effects, as are > mounting ufs file systems on different versions. Why would an older newfs cause trouble? Forward compatibility should be fine.
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