Date: Mon, 11 Jun 2018 14:23:20 -0700 (PDT) From: "Rodney W. Grimes" <freebsd@pdx.rh.CN85.dnsmgr.net> To: Warner Losh <imp@bsdimp.com> Cc: "Rodney W. Grimes" <rgrimes@freebsd.org>, Warner Losh <imp@freebsd.org>, src-committers <src-committers@freebsd.org>, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r334970 - head Message-ID: <201806112123.w5BLNKE6030094@pdx.rh.CN85.dnsmgr.net> In-Reply-To: <CANCZdfoPu%2B1OFGfiUkcBcfk=LrL1MTyz6wZSJKN4Ovd80Xnq1w@mail.gmail.com>
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> On Mon, Jun 11, 2018 at 2:01 PM, Rodney W. Grimes < > freebsd@pdx.rh.cn85.dnsmgr.net> wrote: > > > [ Charset UTF-8 unsupported, converting... ] > > > On Mon, Jun 11, 2018 at 1:52 PM, Rodney W. Grimes < > > > freebsd@pdx.rh.cn85.dnsmgr.net> wrote: > > > > > > > [ Charset UTF-8 unsupported, converting... ] > > > > > Author: imp > > > > > Date: Mon Jun 11 19:32:40 2018 > > > > > New Revision: 334970 > > > > > URL: https://svnweb.freebsd.org/changeset/base/334970 > > > > > > > > > > Log: > > > > > Document the dump issue in UPDATING so people understand when they > > > > > get a new diagnostic. > > > > > > > > > > Modified: > > > > > head/UPDATING > > > > > > > > > > Modified: head/UPDATING > > > > > ============================================================ > > > > ================== > > > > > --- head/UPDATING Mon Jun 11 19:32:36 2018 (r334969) > > > > > +++ head/UPDATING Mon Jun 11 19:32:40 2018 (r334970) > > > > > @@ -32,6 +32,13 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 12.x IS > > SLOW: > > > > > "ln -s 'abort:false,junk:false' /etc/malloc.conf".) > > > > > > > > > > > > > > > +20180611: > > > > > + A bug in dump has been found where it can incorrectly dump > > > > filesystems > > > > > + with more than 512k inodes and produce corrupted dump images. > > > > r334968 > > > > > + closes the door by not dumping filesystems with more than 512k > > > > inodes. > > > > > + While older dumps may 'work' the image they produce may or may > > not > > > > be > > > > > + readable depending on many factors. > > > > > + > > > > > > > > Does it make since to put a temporary warning in newfs to warn users > > > > of the "may bot be able to dump this fs" issue? > > > > > > > > > > It does. > > > > > > However, there may have been an error in assessment, which I'm working > > > through now. If so, there will be a revert. > > > > Ok, I am wondering some about this as I have: > > Filesystem 1024-blocks Used Avail Capacity iused > > ifree %iused Mounted on > > /dev/ada0s2h 473659989 417657089 18110101 96% 918794 > > 47949908 2% /mnt > > > > And have had that file system for at least a decade, > > and it gets dump | restore on a fairly regular basis. > > > Yea. Are you in a good position to test a fix for the core dump db@ was > seeing? A dump /restore (though the restore should be to a second fs to > test) Yes, I have 4 spare drives that can be used as restore targets of the above mentioned file system. And actually have at least 2 copies of it already for sources, so it is just a mater of minutes for me to set up a test bed. > There's two things my fix does: (1) backs out the mistaken limit check and > (2) doesn't walk through a list that's guaranteed to be bogus and fall off > the end. > > Warner -- Rod Grimes rgrimes@freebsd.org
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