[lustre-discuss] Lustre-2.10.5 problem

Mon Sep 24 20:14:32 PDT 2018

Dear All,

I found that my lustre-2.10.5 with ZFS (either 0.7.9 or 0.7.11)
cannot load the "lustre" modules because it cannot load the
"obdclass.ko" module. The error message is the following:

# modprobe -v -v obdclass
insmod /lib/modules/3.12.72/updates/fs/lustre/obdclass.ko 
libkmod: INFO ../libkmod/libkmod-module.c:829 kmod_module_insert_module: Failed to insert module '/lib/modules/3.12.72/updates/fs/lustre/obdclass.ko': No such device
ERROR: could not insert 'obdclass': No such device
libkmod: INFO ../libkmod/libkmod.c:319 kmod_unref: context 0x7fb945d321e0 released

Could anyone suggest how to debug ?

Thanks very much.

T.H.Hsieh

On Tue, Sep 25, 2018 at 12:14:00AM +0800, Tung-Han Hsieh wrote:
> Dear Nathaniel,
> 
> Thank you very much for your kindly reply. Indeed I modified the
> lustre-2.10.5 codes:
> 
>     lustre/osd-zfs/osd_object.c
>     lustre/osd-zfs/osd_xattr.c
> 
> for the declaration:
> 
>     inode_timespec_t now;
> 
> Similar to what you have done in your patch. So I can compile
> lustre-2.10.5 cleanly with zfs-0.7.11. Sorry I forgot to mention.
> 
> But my problem is still there. Actually I just tried:
> 
> 1. Applying your patch to the original lustre-2.10.5 code, and
>    recompile with spl-0.7.11 and zfs-0.7.11. But loading "lustre"
>    module still gives "no such device" error.
> 
> 2. I recompile the original lustre-2.10.5 with spl-0.7.9 and
>    zfs-0.7.9. They can be compiled cleanly. But again I got the
>    "no such device" error when loading "lustre" module.
> 
> I am wondering that I must overlooked a trivial step, something
> like one (or some) of the utilities in /opt/lustre/sbin/* should
> be linked to /sbin/ or /usr/sbin/ ....
> 
> Any suggestions are very appreciated.
> 
> Thank you very much.
> 
> 
> T.H.Hsieh
> 
> 
> On Mon, Sep 24, 2018 at 01:21:19PM +0000, Nathaniel Clark wrote:
> > Hello Tung-Han,
> > 
> > ZFS 0.7.11 doesn’t compile cleanly with Lustre, yet.
> > 
> > There’s a ticket for adding ZFS 0.7.11 support to lustre:
> > https://jira.whamcloud.com/browse/LU-11393
> > 
> > It has patches for master (pre-2.12) and a separate patch for 2.10.
> > 
> > —
> > Nathaniel Clark <nclark at whamcloud.com<mailto:nclark at whamcloud.com>>
> > Senior Engineer
> > Whamcloud / DDN
> > 
> > On Sep 24, 2018, at 2:15 PM, Tung-Han Hsieh <thhsieh at twcp1.phys.ntu.edu.tw<mailto:thhsieh at twcp1.phys.ntu.edu.tw>> wrote:
> > 
> > Dear All,
> > 
> > I am trying to install Lustre version 2.10.5 with ZFS-0.7.11
> > from source code. After compilation and installation, I tried
> > to load the "lustre" module, but encountered the following
> > error:
> > 
> > # modprobe lustre
> > could not load module 'lustre': no such device
> > 
> > My procedure of installation is the following:
> > 
> > 1. Compile vanilla kernel 3.12.72 downloaded from:
> >   https://mirrors.edge.kernel.org/pub/linux/kernel/v3.x/linux-3.12.72.tar.gz
> > 
> > 2. Compile spl-0.7.11 downloaded from:
> >   https://github.com/zfsonlinux/zfs/releases/download/zfs-0.7.11/spl-0.7.11.tar.gz
> > 
> >   with the following steps:
> >   # ./configure --prefix=/opt/lustre --with-linux=/path/to/linux-3.12.72
> >   # make
> >   # make install
> > 
> > 3. Compile zfs-0.7.11 downloaded from:
> >   https://github.com/zfsonlinux/zfs/releases/download/zfs-0.7.11/zfs-0.7.11.tar.gz
> > 
> >   with the following steps:
> >   # ./configure --prefix=/opt/lustre \
> >                 --with-linux=/path/to/linux-3.12.72 \
> >                 --with-spl=/path/to/spl-0.7.11
> >   # make
> >   # make install
> > 
> > 4. Compile lustre downloaded from:
> >   https://downloads.whamcloud.com/public/lustre/lustre-2.10.5/sles12sp3/client/SRPMS/lustre-2.10.5-1.src.rpm
> > 
> >   Then I unpack the SRPM by the command:
> >   # rpm2cpio lustre-2.10.5-1.src.rpm | cpio --extract --make-directories
> > 
> >   and compile it by the following:
> >   # ./configure --prefix=/opt/lustre \
> >                 --with-linux=/path/to/linux-3.12.72 \
> >                 --with-spl=/path/to/spl-0.7.11 \
> >                 --with-zfs=/path/to/zfs-0.7.11 \
> >                 --with-o2ib=no \
> >                 --disable-ldiskfs
> >   # make
> >   # make install
> > 
> > 5. I have made sure the following settings and utilities are correct:
> >   - PATH contains /opt/lustre/bin and /opt/lustre/sbin
> >   - /sbin/mount.lustre exists.
> >   - /sbin/mount.zfs exists.
> >   - /usr/sbin/l_getidentity exists.
> >   - /usr/sbin/ko2iblnd-probe exists.
> >   - /etc/modprobe.d/lustre.conf contains:
> >     options lnet networks=tcp
> >   - /etc/modprobe.d/ko2iblnd.conf contains:
> >     alias ko2iblnd-opa ko2iblnd
> >     options ko2iblnd-opa peer_credits=128 peer_credits_hiw=64 credits=1024 concurrent_sends=256 ntx=2048 map_on_demand=32 fmr_pool_size=2048 fmr_flush_trigger=512 fmr_cache=1
> >     install ko2iblnd /usr/sbin/ko2iblnd-probe
> > 
> > Then I tried to run "modprobe lustre", it says "no such device" error.
> > 
> > I tried to replace Lustre-2.10.5 by Lustre-2.9 downloaded from:
> > 
> > https://downloads.whamcloud.com/public/lustre/lustre-2.9.0/sles12sp1/client/SRPMS/lustre-2.9.0-1.src.rpm
> > 
> > and proceed exactly the same installation steps. Everything works fine.
> > 
> > Could anyone suggest me what have I missed for lustre-2.10.5 ? Or suggest
> > me how to debug.
> > 
> > Thanks very much.
> > 
> > 
> > T.H.Hsieh
> > _______________________________________________
> > lustre-discuss mailing list
> > lustre-discuss at lists.lustre.org
> > http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
> > 
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