Hi, first of all, sorry for my bad english :-) I''m using debian stable as dom0 (xen-3.2.1) with the debian xen kernel (linux-image-2.6. 26-2-xen-amd64_2.6.26-16~snapshot.13506_amd64.deb) on amd64. The official debian xen kernel has an nfs bug, so i''m using a development version. I''ve running some domUs (all PV) which are booting over nfs. All is working fine except if i want to copy large files in the domU to another or the same nfs share or i read big mailboxes (500MB) with my mutt, the network over the xenbridge seems to die and the domu can''t access the network anymore .. from the normal network the host system nfs server is still available (some other clients are also booting per nfs too, these are real machines) .. if i make in the DomU a dd if=/dev/zero |buffer -z32k| ssh any-real-machin ''of=XXXX'' everything works fine, there are no problems .. I also have an oops -> http://paste.debian.net/34789/ Any ideas - i don''t want to switch to kvm or anything else. Thanks, -- /j<r>d _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi, * On Thu, 30 Apr 2009 at 10:58 +0100, Bhasker C V wrote:> xm dmesg may show some information ? > or dmesg on the dom0 ?only this[1] is logged on Dom0 The DomU stops wiht "NFS Server is not responding" [1]: http://paste.debian.net/34789/ -- /j<r>d _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
* On Thu, 30 Apr 2009 at 11:09 +0100, Bhasker C V wrote:> Is there a load issue failure of your NFS server ? > > Is the server still responding ? Are you able to mount > the NFS share in some other machineThe NFS server is still responding und some other diskless clients have no problems (a linux-vdr and a workstation)> This (by guess) looks like an NFS server failure due to > heavy load when copying files !i also thought first .. but thats not right .. one of the domUs boots with an diskimage .. and is also not reachable .. the bug semms to be a xen problem .. the bridge is dead and the kernel ops and message .. -- /j<r>d _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
xm dmesg may show some information ? or dmesg on the dom0 ? On Thu, 30 Apr 2009, Juergen Dattl wrote:> Hi, > > first of all, sorry for my bad english :-) I''m using debian stable > as dom0 (xen-3.2.1) with the debian xen kernel (linux-image-2.6. > 26-2-xen-amd64_2.6.26-16~snapshot.13506_amd64.deb) on amd64. The > official debian xen kernel has an nfs bug, so i''m using a > development version. > > I''ve running some domUs (all PV) which are booting over nfs. All is > working fine except if i want to copy large files in the domU to > another or the same nfs share or i read big mailboxes (500MB) with > my mutt, the network over the xenbridge seems to die and the domu > can''t access the network anymore .. from the normal network the host > system nfs server is still available (some other clients are also > booting per nfs too, these are real machines) .. if i make in the > DomU a dd if=/dev/zero |buffer -z32k| ssh any-real-machin ''of=XXXX'' > everything works fine, there are no problems .. > > I also have an oops -> http://paste.debian.net/34789/ > > Any ideas - i don''t want to switch to kvm or anything else. Thanks, > -- > /j<r>d > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Is there a load issue failure of your NFS server ? Is the server still responding ? Are you able to mount the NFS share in some other machine This (by guess) looks like an NFS server failure due to heavy load when copying files ! On Thu, 30 Apr 2009, Juergen Dattl wrote:> Hi, > > * On Thu, 30 Apr 2009 at 10:58 +0100, Bhasker C V wrote: >> xm dmesg may show some information ? >> or dmesg on the dom0 ? > > only this[1] is logged on Dom0 > The DomU stops wiht "NFS Server is not responding" > > [1]: http://paste.debian.net/34789/ > > -- > /j<r>d > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Thu, Apr 30, 2009 at 4:17 PM, Juergen Dattl <lists@kastel.net> wrote:>> This (by guess) looks like an NFS server failure due to >> heavy load when copying files ! > > i also thought first .. but thats not right .. one of the domUs > boots with an diskimage .. and is also not reachable .. the bug > semms to be a xen problem .. the bridge is dead and the kernel ops > and message .. > -- > /j<r>dSo .. why are you still using this setup? Debian uses relatively-new kernel, which is not as widely-tested as the old 2.6.18 kernel for Xen. Add to it the fact that you''re using a snapshot version, which is even less-tested, then I have to say it''s not really surprising for it to have bugs. I''d recommend you use a well-tested known-to-work setup. I don''t know which version works best for Debian, but I do know that a RHEL-5.3 domU with kernel 2.6.18-128.1.6.el5xen can read-write lots of data from nfs just fine (just tested it with a 1G file). Since the bug seems to be on dom0 kernel, you might want to try using 2.6.18 kernel from xen.org, or try some older xenified debian kernel. Regards, Fajar _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users