Date: Wed, 15 Dec 2010 13:14:09 +0300 From: Anonymous <swell.k@gmail.com> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/153173: [zfs] booting from a gzip-compressed dataset doesn't work Message-ID: <86ipyvpclq.fsf@gmail.com> Resent-Message-ID: <201012151020.oBFAK8qa090891@freefall.freebsd.org>
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>Number: 153173 >Category: kern >Synopsis: [zfs] booting from a gzip-compressed dataset doesn't work >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-fs >State: open >Quarter: >Keywords: >Date-Required: >Class: change-request >Submitter-Id: current-users >Arrival-Date: Wed Dec 15 10:20:08 UTC 2010 >Closed-Date: >Last-Modified: >Originator: Anonymous >Release: FreeBSD 9.0-CURRENT amd64 >Organization: >Environment: Not documented? Google[1] doesn't return why it's kept unimplemented. And what seems to be initial zfsboot commit log[2] doesn't help. [1] http://google.com/search?q=zfs+gzip+boot+freebsd [2] http://p4db.freebsd.org/changeView.cgi?CH=124081 >Description: When setting compression globally, i.e. on a root dataset, one has to be careful as such datasets are not bootable. And dedup doesn't work on blocks with different compression which limits at how many cycles one can throw away to save space. This is a feature request. >How-To-Repeat: $ zpool create -O compression=gzip -R /mnt/foo foo gptid/A-B-C-D-E $ qemu -nographic foo.img /boot.config: -h ZFS: unsupported compression algorithm gzip-6 ZFS: i/o error - all block copies unavailable Invalid format FreeBSD/x86 boot Default: foo:/boot/kernel/kernel boot: # in case zfsloader is compressed by off/lzjb/zle $ qemu -nographic foo.img /boot.config: -h Consoles: serial port BIOS drive C: is disk0 BIOS 637kB/130036kB available memory FreeBSD/x86 ZFS enabled bootstrap loader, Revision 1.1 (foo@bar, Tue Dec 14 00:38:42 UTC 2010) ZFS: unsupported compression algorithm gzip-6 ZFS: i/o error - all block copies unavailable start not found - ZFS: unsupported compression algorithm gzip-6 ZFS: i/o error - all block copies unavailable ZFS: unsupported compression algorithm gzip-6 ZFS: i/o error - all block copies unavailable ZFS: unsupported compression algorithm gzip-6 ZFS: i/o error - all block copies unavailable ZFS: unsupported compression algorithm gzip-6 ZFS: i/o error - all block copies unavailable can't load 'kernel' Type '?' for a list of commands, 'help' for more detailed help. OK >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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