* Re: blk_update_request: I/O error on NFS
[not found] ` <20160112120548.GB27051@citrix.com>
@ 2016-01-12 12:58 ` Roger Pau Monné
2016-01-27 17:40 ` blk_update_request: I/O error on NFS (was: [Xen-users] xen domU disk on nfs shared file) Konrad Rzeszutek Wilk
1 sibling, 0 replies; 3+ messages in thread
From: Roger Pau Monné @ 2016-01-12 12:58 UTC (permalink / raw)
To: Wei Liu, Kojedzinszky Richárd, Xen-devel; +Cc: linux-nfs
Hello,
El 12/01/16 a les 13.05, Wei Liu ha escrit:
> Drop xen-users@, CC xen-devel@ and blk maintainers, change title.
>
> On Mon, Jan 11, 2016 at 03:08:24PM +0100, Kojedzinszky Richárd wrote:
>> Dear all,
>>
>> We are facing a regular lockup with our xen setup. We have an nfs share
>> mounted on the xen dom0, where the vm images are served, and those files are
>> given to xen domUs.
>>
>> I was just preparing an experiment, where I created a 100G file on the host:
>> # truncate -s 100G /srv/nfs/domU/disk2
>> And after added this disk to the instance's configuration.
Have you tried creating the file with dd instead of truncate? (so it's
not sparse)
>> On the host this is the mountpoint:
>> # mount|grep srv/xen
>> 10.1.1.1:/mnt/main/vps on /srv/xen type nfs (rw,relatime,vers=3,rsize=16384,wsize=16384,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=10.1.1.1,mountvers=3,mountport=4045,mountproto=udp,local_lock=none,addr=10.1.1.1)
>>
>> After starting the instance I partitioned the disk with gdisk, and created
>> an xfs fs on it. While the fs has been created well, strange messages
>> appeared on the console:
AFAICT this is the guest console. Is there any corresponding error on
the host console?
>> [ 23.787504] blk_update_request: I/O error, dev xvdc, sector 2048
>> [ 23.788904] blk_update_request: I/O error, dev xvdc, sector 8390655
>> [ 23.789611] blk_update_request: I/O error, dev xvdc, sector 16779262
>> [ 23.790359] blk_update_request: I/O error, dev xvdc, sector 25167869
>> [ 23.791148] blk_update_request: I/O error, dev xvdc, sector 33556476
>> [ 23.791498] blk_update_request: I/O error, dev xvdc, sector 41945083
>> [ 23.791498] blk_update_request: I/O error, dev xvdc, sector 50333690
>> [ 23.791498] blk_update_request: I/O error, dev xvdc, sector 58722297
>> [ 23.791498] blk_update_request: I/O error, dev xvdc, sector 67110904
>> [ 23.791498] blk_update_request: I/O error, dev xvdc, sector 75499511
>>
>> I dont think that this is normal. If I chose a local block device (probably
>> lvm) for the domU, this does not appear.
IIRC Xen 4.4 still uses Qemu (Qdisk) for raw disks, do you have any kind
of errors/warnings in /var/log/xen/qemu-dm-<domain_name>.log?
Roger.
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: blk_update_request: I/O error on NFS (was: [Xen-users] xen domU disk on nfs shared file)
[not found] ` <20160112120548.GB27051@citrix.com>
2016-01-12 12:58 ` blk_update_request: I/O error on NFS Roger Pau Monné
@ 2016-01-27 17:40 ` Konrad Rzeszutek Wilk
1 sibling, 0 replies; 3+ messages in thread
From: Konrad Rzeszutek Wilk @ 2016-01-27 17:40 UTC (permalink / raw)
To: Wei Liu
Cc: Xen-devel, Kojedzinszky Richárd, linux-nfs,
Roger Pau Monné
On Tue, Jan 12, 2016 at 12:05:48PM +0000, Wei Liu wrote:
> Drop xen-users@, CC xen-devel@ and blk maintainers, change title.
>
What is the MTU you are using?
How do you mount the disk?
> On Mon, Jan 11, 2016 at 03:08:24PM +0100, Kojedzinszky Richárd wrote:
> > Dear all,
> >
> > We are facing a regular lockup with our xen setup. We have an nfs share
> > mounted on the xen dom0, where the vm images are served, and those files are
> > given to xen domUs.
> >
> > I was just preparing an experiment, where I created a 100G file on the host:
> > # truncate -s 100G /srv/nfs/domU/disk2
> > And after added this disk to the instance's configuration.
> >
> > On the host this is the mountpoint:
> > # mount|grep srv/xen
> > 10.1.1.1:/mnt/main/vps on /srv/xen type nfs (rw,relatime,vers=3,rsize=16384,wsize=16384,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=10.1.1.1,mountvers=3,mountport=4045,mountproto=udp,local_lock=none,addr=10.1.1.1)
> >
> > After starting the instance I partitioned the disk with gdisk, and created
> > an xfs fs on it. While the fs has been created well, strange messages
> > appeared on the console:
> >
> > [ 23.787504] blk_update_request: I/O error, dev xvdc, sector 2048
> > [ 23.788904] blk_update_request: I/O error, dev xvdc, sector 8390655
> > [ 23.789611] blk_update_request: I/O error, dev xvdc, sector 16779262
> > [ 23.790359] blk_update_request: I/O error, dev xvdc, sector 25167869
> > [ 23.791148] blk_update_request: I/O error, dev xvdc, sector 33556476
> > [ 23.791498] blk_update_request: I/O error, dev xvdc, sector 41945083
> > [ 23.791498] blk_update_request: I/O error, dev xvdc, sector 50333690
> > [ 23.791498] blk_update_request: I/O error, dev xvdc, sector 58722297
> > [ 23.791498] blk_update_request: I/O error, dev xvdc, sector 67110904
> > [ 23.791498] blk_update_request: I/O error, dev xvdc, sector 75499511
> >
> > I dont think that this is normal. If I chose a local block device (probably
> > lvm) for the domU, this does not appear.
> >
> > The host is running xen-4.4 with 3.16.0-4-amd64 kernel (debian jessie
> > stock), the domU is running 4.3.0-0.bpo.1-amd64 (jessie backport, 4.4.4).
> >
> > I suspect those messages should not be there.
> >
> > Regards,
> >
> > Kojedzinszky Richárd
> > Euronet Magyarorszag Informatika Zrt.
>
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@lists.xen.org
> > http://lists.xen.org/xen-users
>
^ permalink raw reply [flat|nested] 3+ messages in thread