Hi Konrad, Thanks for the heads up. My main motivation for just plugging the FC15 kernel into the FC14 machine(s) is that 3 of the hosts live in remote geographies. It's likely they'll probz live the rest of their lives as FC14 machines. The graphics adaptor is: 05:05.0 VGA compatible controller: ATI Technologies Inc ES1000 (rev 02) Thanks again. V On Thu, 29 Mar 2012 10:51:14 AM Konrad Rzeszutek Wilk wrote: > On Thu, Mar 29, 2012 at 01:38:38PM +1100, Virgil wrote: > > Hi Konrad, > > > > Firstly, thanks for the reply. > > > > What I've ended up doing is blindly forcing the FC15 kernel in. > > > > Linux rich.wwrich.xxx 2.6.42.9-2.fc15.x86_64 #1 SMP Mon Mar 5 20:55:32 > > UTC 2012 x86_64 x86_64 x86_64 GNU/Linux > > > > This has worked and resolved by issue as the host is advertising flush > > diskcache. > > > > [ 1.051933] blkfront: xvda: flush diskcache: enabled > > [ 1.252959] xvda: xvda1 xvda2 > > [ 1.297201] blkfront: xvdb: flush diskcache: enabled > > [ 1.303110] xvdb: xvdb1 xvdb2 > > [ 1.565645] md: bind<xvda1> > > [ 1.668360] md: bind<xvdb1> > > [ 1.691897] md: raid1 personality registered for level 1 > > [ 1.696683] bio: create slab <bio-1> at 1 > > [ 1.700177] md/raid1:md127: active with 2 out of 2 mirrors > > [ 1.701113] md127: detected capacity change from 0 to 7516180480 > > [ 1.974317] EXT4-fs (md127): mounted filesystem with ordered data > > mode. Opts: (null) [ 2.065875] dracut: Checking ext4: > > /dev/disk/by-label/rootfs > > [ 2.067090] dracut: issuing e2fsck -a /dev/disk/by-label/rootfs > > [ 2.147305] dracut: rootfs: clean, 42918/454272 files, 417708/1835005 > > blocks [ 2.149062] dracut: Remounting /dev/disk/by-label/rootfs with > > -o ro [ 2.182952] EXT4-fs (md127): mounted filesystem with ordered > > data mode. Opts: (null) [ 2.195483] dracut: Mounted root filesystem > > /dev/md127 > > [ 2.340884] dracut: Switching root > > > > As a side issue, I also recompiled Xen 4.1.2 on fc14 and installed it. > > Everything worked *except* libvirtd. No domU's listed. So I recompiled > > FC15's libvirtd too. No go. > I think the F16 has them fixed. > > > I just backed out. Only the FC15 kernel is left. All running well now. > > > > Oh and also the kernel works great on bare metal except, when under Xen, > > the graphics went nuts. Added nomodeset to overcomes this. > > Which graphics is this? Linux 3.3 has some new fixes for this so if you use > F17, the issue should disappear. > > > The last thing I might try is to recompile the FC15 kernel on an FC14 > > host to make it easy to install via rpm (assuming it can compile). > > > > On Mon, 26 Mar 2012 01:17:49 PM Konrad Rzeszutek Wilk wrote: > > > On Mon, Mar 19, 2012 at 01:35:19PM +1100, Virgil wrote: > > > > I'm having a problem with mdraid running in a DomU. The issue is > > > > that > > > > mdraid declares one leg of the raid to have failed (when there's > > > > actually nothing wrong). > > > > > > > > DomU is fc16 - 3.2.2-1.fc16.x86_64 > > > > Dom0 is fc14 - 2.6.32.26-174.2.xendom0.fc12.x86_64 > > > > > > > > The same DomU running on Dom0 fc16 - 3.2.7-1.fc16.x86_64 runs > > > > perfectly. > > > > > > > > This appears to be a known issue, however the resolution (which > > > > seems to be to disable barriers on the fly) doesn't seem to > > > > work in this case.> > > > > hm, that is true - it wouldn't as the workarounds are for > > > filesystems. > > > > > > But perhaps - is there a way to turn barriers of in the raid system? > > > > > > > My question is: Is it possible to pass a parameter to the > > > > blkfront > > > > driver to ask it not to enable barrier during initialization? or > > > > is > > > > there another work around? > > > > > > Not that I know of. You could back-port the proper fix to 2.6.32 > > > (or just "Fix" the older 2.6.32 to not advetise feature-barrier). > > > > > > > [ 1.033058] blkfront: xvda: barrier: enabled > > > > [ 1.099153] xvda: xvda1 xvda2 > > > > [ 1.102871] blkfront: xvdb: barrier: enabled > > > > [ 1.130876] xvdb: xvdb1 xvdb2 > > > > [ 1.292692] md: bind<xvdb1> > > > > [ 1.413416] md: bind<xvda1> > > > > [ 1.419411] md: raid1 personality registered for level 1 > > > > [ 1.419836] bio: create slab <bio-1> at 1 > > > > [ 1.419953] md/raid1:md127: active with 2 out of 2 mirrors > > > > [ 1.419992] md127: detected capacity change from 0 to > > > > 7516180480 > > > > [ 1.424562] md127: unknown partition table > > > > [ 1.547284] EXT4-fs (md127): barriers disabled > > > > [ 1.553107] EXT4-fs (md127): mounted filesystem with ordered > > > > data > > > > mode. Opts: (null) > > > > [ 1.669483] dracut: Checking ext4: /dev/disk/by-label/rootfs > > > > [ 1.669592] dracut: issuing e2fsck -a > > > > /dev/disk/by-label/rootfs > > > > [ 1.690595] blkfront: barrier: empty write xvdb op failed > > > > [ 1.690611] blkfront: xvdb: barrier or flush: disabled > > > > [ 1.690628] end_request: I/O error, dev xvdb, sector 14682096 > > > > [ 1.690638] end_request: I/O error, dev xvdb, sector 14682096 > > > > [ 1.690646] md: super_written gets error=-5, uptodate=0 > > > > [ 1.690655] md/raid1:md127: Disk failure on xvdb1, disabling > > > > device. [ 1.690657] md/raid1:md127: Operation continuing on > > > > 1 devices. [ 1.690677] blkfront: barrier: empty write xvda > > > > op failed [ 1.690684] blkfront: xvda: barrier or flush: > > > > disabled > > > > [ 1.690696] end_request: I/O error, dev xvda, sector 14682096 > > > > [ 1.690705] end_request: I/O error, dev xvda, sector 14682096 > > > > [ 1.690713] md: super_written gets error=-5, uptodate=0 > > > > [ 1.692991] RAID1 conf printout: > > > > [ 1.692997] --- wd:1 rd:2 > > > > [ 1.693002] disk 0, wo:0, o:1, dev:xvda1 > > > > [ 1.693006] disk 1, wo:1, o:0, dev:xvdb1 > > > > [ 1.693010] RAID1 conf printout: > > > > [ 1.693013] --- wd:1 rd:2 > > > > [ 1.693016] disk 0, wo:0, o:1, dev:xvda1 > > > > [ 1.702896] dracut: rootfs: clean, 25635/454272 files, > > > > 293967/1835005 blocks [ 1.703682] dracut: Remounting > > > > /dev/disk/by-label/rootfs with -o ro [ 1.773347] EXT4-fs > > > > (md127): barriers disabled > > > > [ 1.774552] EXT4-fs (md127): mounted filesystem with ordered > > > > data > > > > mode. Opts: (null) > > > > [ 1.797159] dracut: Mounted root filesystem /dev/md127 > > > > [ 1.937620] dracut: Switching root > > > > > > > > -- > > > > xen mailing list > > > > xen@xxxxxxxxxxxxxxxxxxxxxxx > > > > https://admin.fedoraproject.org/mailman/listinfo/xen -- xen mailing list xen@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/xen
