Date: Sat, 10 Feb 2018 11:24:31 -0700 From: Alan Somers <asomers@freebsd.org> To: Willem Jan Withagen <wjw@digiware.nl> Cc: freebsd current <freebsd-current@freebsd.org> Subject: Re: posix_fallocate on ZFS Message-ID: <CAOtMX2jZr_kvJgOZWeiB-AZ3-7-uUu%2BUQ3P0nKhGZ0eNRzwMOQ@mail.gmail.com> In-Reply-To: <1e2f43fd-85da-6629-62d1-6e96790278e5@digiware.nl> References: <1e2f43fd-85da-6629-62d1-6e96790278e5@digiware.nl>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sat, Feb 10, 2018 at 10:28 AM, Willem Jan Withagen <wjw@digiware.nl> wrote: > Hi, > > This has been disabled on ZFS since last November. > And I do understand the rationale on this. > > BUT > > I've now upgraded some of my HEAD Ceph test systems and they now fail, > since Ceph uses posix_fallocate() to allocate space for the > FileStore-journal. > > Is there any expectation that this is going to fixed in any near future? > > --WjW > No. It's fundamentally impossible to support posix_fallocate on a COW filesystem like ZFS. Ceph should be taught to ignore an EINVAL result, since the system call is merely advisory. -Alan
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CAOtMX2jZr_kvJgOZWeiB-AZ3-7-uUu%2BUQ3P0nKhGZ0eNRzwMOQ>