Date: Tue, 26 Feb 2019 10:16:27 -0600 From: Benjamin Kaduk <bjkfbsd@gmail.com> To: Cy Schubert <Cy.Schubert@cschubert.com> Cc: Baptiste Daroussin <bapt@freebsd.org>, src-committers <src-committers@freebsd.org>, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r344569 - in head/cddl/contrib/opensolaris: cmd/zfs lib/libzfs/common Message-ID: <CAJ5_RoCzUwMyzFi6n1F9NaxEB%2BTACS23AAF2NatVwn-0Hdtsxw@mail.gmail.com> In-Reply-To: <1F5FB340-1CD2-400F-82D3-8D4949A351A2@cschubert.com> References: <201902260818.x1Q8IZGO061175@repo.freebsd.org> <39F76FF0-B40A-43F9-AC77-5D535674A4B8@cschubert.com> <1F5FB340-1CD2-400F-82D3-8D4949A351A2@cschubert.com>
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On Tue, Feb 26, 2019 at 10:14 AM Cy Schubert <Cy.Schubert@cschubert.com> wrote: > On February 26, 2019 7:48:27 AM PST, Cy Schubert < > Cy.Schubert@cschubert.com> wrote: > >On February 26, 2019 12:18:35 AM PST, Baptiste Daroussin > ><bapt@FreeBSD.org> wrote: > [trimming the unneeded pile of commit body] > >This broke my systems, many filesystems fail to mount causing nullfs > >late mounts to fail. No details now until tonight. > > > >Suggest we back this out until it is properly tested. > > Nested zfs filesystems seem not to be handled properly or possibly not > supported any more. This explains my mail gateway also not mounting all > filesystems in /home. It was odd that dovecot stopped working. > > The symptom of the problem is zfs mount -a no longer mounts all > filesystems. Zfs mount fails saying the filesystem is already mounted. The > workaround is to zfs umount each affected zfs dataset by hand and zfs mount > it by hand. > > Generally this has screwed up sites that have hundreds (in my case 122) > zfs datasets. The work around might be to script testing each mount, > unmounting and remounting if necessary. > > I'm being sarcastic about creating an rc script to clean this up. This > needs to be backed out and tested properly before being committed. > > I don't know what you mean by "nested zfs filesystems" -- do you mean a zpool within a zvol? That has been unsupported for a long time, IIRC. And I'm not sure what else "nested filesystems" would be, since having (e.g.) separate zfs filesystems for /usr and /usr/ports is so common that surely it has already been tested... -Ben
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