Michael Gregg
2005-Oct-31 21:30 UTC
[Xen-users] problem accessing swap partition on a xen machines
I''m using debian stable with a recompiled xen dom0 kernel. running debian on any domu. My partitions are drives created with lwm. I''m having problems with my swap partiton getting corrupted. When I get the problem, if I pull the data from the swap with dd and get errors. If I wait a few minutes, the problems go away. Has anybody seen this? Does anybody have any idea on howto solve this? Please ask questions if you need more information. problem observed: mg-gws:~# dd if=/dev/sda2 of=/dev/null end_request: I/O error, dev sda2, sector 5080 end_request: I/O error, dev sda2, sector 5120 end_request: I/O error, dev sda2, sector 5208 end_request: I/O error, dev sda2, sector 5296 end_request: I/O error, dev sda2, sector 5384 end_request: I/O error, dev sda2, sector 5392 end_request: I/O error, dev sda2, sector 5424 end_request: I/O error, dev sda2, sector 5464 end_request: I/O error, dev sda2, sector 5552 end_request: I/O error, dev sda2, sector 5640 2097152+0 records in 2097152+0 records out 1073741824 bytes transferred in 10.769949 seconds (99697949 bytes/sec) 1 minute after problem. mg-gws:~# dd if=/dev/sda2 of=/dev/null 2097152+0 records in 2097152+0 records out 1073741824 bytes transferred in 10.769949 seconds (99697949 bytes/sec) My xen config is as follows: # Creator: michael gregg # Creation Date: Wed Oct 26 11:51:54 PDT 2005 # contact email: mgregg -at- propel.com # created with: CreateXenVm mg-gws 192 michael gregg # vif = [''mac=42:42:00:80:01:92''] interface = "eth0" memory = 128 name = "mg-gws" kernel = "/boot/xen-linux-2.6.11-ocxenu" disk = [''phy:vg/mg-gws_data,sda1,w'' ,''phy:vg/mg-gws_swap,sda2,2''] root = "/dev/sda1" # assigned IP Address: 172.16.80.192 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Michael Gregg
2005-Nov-01 23:21 UTC
Re: [Xen-users] problem accessing swap partition on a xen machines - resolved
On Mon, 2005-10-31 at 13:30 -0800, Michael Gregg wrote:> I''m using debian stable with a recompiled xen dom0 kernel. > > running debian on any domu. > > My partitions are drives created with lwm. > > I''m having problems with my swap partiton getting corrupted. When I get > the problem, if I pull the data from the swap with dd and get errors. If > I wait a few minutes, the problems go away. > > Has anybody seen this? Does anybody have any idea on howto solve this? > Please ask questions if you need more information. > > problem observed: > mg-gws:~# dd if=/dev/sda2 of=/dev/null > end_request: I/O error, dev sda2, sector 5080 > end_request: I/O error, dev sda2, sector 5120 > end_request: I/O error, dev sda2, sector 5208 > end_request: I/O error, dev sda2, sector 5296 > end_request: I/O error, dev sda2, sector 5384 > end_request: I/O error, dev sda2, sector 5392 > end_request: I/O error, dev sda2, sector 5424 > end_request: I/O error, dev sda2, sector 5464 > end_request: I/O error, dev sda2, sector 5552 > end_request: I/O error, dev sda2, sector 5640 > 2097152+0 records in > 2097152+0 records out > 1073741824 bytes transferred in 10.769949 seconds (99697949 bytes/sec) > > 1 minute after problem. > mg-gws:~# dd if=/dev/sda2 of=/dev/null > 2097152+0 records in > 2097152+0 records out > 1073741824 bytes transferred in 10.769949 seconds (99697949 bytes/sec) > > My xen config is as follows: > > # Creator: michael gregg > # Creation Date: Wed Oct 26 11:51:54 PDT 2005 > # contact email: mgregg -at- propel.com > # created with: CreateXenVm mg-gws 192 michael gregg > # > vif = [''mac=42:42:00:80:01:92''] > interface = "eth0" > memory = 128 > name = "mg-gws" > kernel = "/boot/xen-linux-2.6.11-ocxenu" > disk = [''phy:vg/mg-gws_data,sda1,w'' ,''phy:vg/mg-gws_swap,sda2,2''] > root = "/dev/sda1" > # assigned IP Address: 172.16.80.192 > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-usersSo, I figured out my own problem. I had a typo in my xen configuration file: To set up the disks I used: disk = [''phy:vg/mg-gws_data,sda1,w'' ,''phy:vg/mg-gws_swap,sda2,2''] notice the "2"------------------------------------------------^ it should have been "w" disk = [''phy:vg/mg-gws_data,sda1,w'' ,''phy:vg/mg-gws_swap,sda2,w''] --------------------------------------------------------------^ _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Dirk H. Schulz
2005-Nov-02 07:56 UTC
Re: [Xen-users] problem accessing swap partition on a xen machines
Hi Gregg, did you have a look if swap space is used during your dd run? If it is not in use, then the question is, if the problem is restricted to swap space? Did you test your other lvm (it''s lvm, isn''t it?) volumes as well? Dirk Michael Gregg schrieb:>I''m using debian stable with a recompiled xen dom0 kernel. > >running debian on any domu. > >My partitions are drives created with lwm. > >I''m having problems with my swap partiton getting corrupted. When I get >the problem, if I pull the data from the swap with dd and get errors. If >I wait a few minutes, the problems go away. > >Has anybody seen this? Does anybody have any idea on howto solve this? >Please ask questions if you need more information. > >problem observed: >mg-gws:~# dd if=/dev/sda2 of=/dev/null >end_request: I/O error, dev sda2, sector 5080 >end_request: I/O error, dev sda2, sector 5120 >end_request: I/O error, dev sda2, sector 5208 >end_request: I/O error, dev sda2, sector 5296 >end_request: I/O error, dev sda2, sector 5384 >end_request: I/O error, dev sda2, sector 5392 >end_request: I/O error, dev sda2, sector 5424 >end_request: I/O error, dev sda2, sector 5464 >end_request: I/O error, dev sda2, sector 5552 >end_request: I/O error, dev sda2, sector 5640 >2097152+0 records in >2097152+0 records out >1073741824 bytes transferred in 10.769949 seconds (99697949 bytes/sec) > >1 minute after problem. >mg-gws:~# dd if=/dev/sda2 of=/dev/null >2097152+0 records in >2097152+0 records out >1073741824 bytes transferred in 10.769949 seconds (99697949 bytes/sec) > >My xen config is as follows: > ># Creator: michael gregg ># Creation Date: Wed Oct 26 11:51:54 PDT 2005 ># contact email: mgregg -at- propel.com ># created with: CreateXenVm mg-gws 192 michael gregg ># >vif = [''mac=42:42:00:80:01:92''] >interface = "eth0" >memory = 128 >name = "mg-gws" >kernel = "/boot/xen-linux-2.6.11-ocxenu" >disk = [''phy:vg/mg-gws_data,sda1,w'' ,''phy:vg/mg-gws_swap,sda2,2''] >root = "/dev/sda1" ># assigned IP Address: 172.16.80.192 > > >_______________________________________________ >Xen-users mailing list >Xen-users@lists.xensource.com >http://lists.xensource.com/xen-users > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Michael Gregg
2005-Nov-02 18:53 UTC
Re: [Xen-users] problem accessing swap partition on a xen machines
ahh, the swap was in test during this test. There was a lot here for me to track down, but the problem ended up being my goof. I have about 20 xen machines, and all could have the problem in higher load situations. The problem ended up being my xen configuration files. I was listing my disks as so: disk = [''phy:vg/dwm-dev_data,sda1,w'' ,''phy:vg/dwm-dev_swap,sda2,2''] ---------------------notice the "2"-----------------------------^ The 2 should have been w, like this: disk = [''phy:vg/dwm-dev_data,sda1,w'' ,''phy:vg/dwm-dev_swap,sda2,w''] ---------------------now it''s a "w"-----------------------------^ Anyhow, with the 2 there xen was starting up the disk in some unknown mode that broke my swap space. Thanks for the reply. Michael- On Wed, 2005-11-02 at 08:56 +0100, Dirk H. Schulz wrote:> Hi Gregg, > > did you have a look if swap space is used during your dd run? > > If it is not in use, then the question is, if the problem is restricted > to swap space? Did you test your other lvm (it''s lvm, isn''t it?) volumes > as well? > > Dirk > > Michael Gregg schrieb: > > >I''m using debian stable with a recompiled xen dom0 kernel. > > > >running debian on any domu. > > > >My partitions are drives created with lwm. > > > >I''m having problems with my swap partiton getting corrupted. When I get > >the problem, if I pull the data from the swap with dd and get errors. If > >I wait a few minutes, the problems go away. > > > >Has anybody seen this? Does anybody have any idea on howto solve this? > >Please ask questions if you need more information. > > > >problem observed: > >mg-gws:~# dd if=/dev/sda2 of=/dev/null > >end_request: I/O error, dev sda2, sector 5080 > >end_request: I/O error, dev sda2, sector 5120 > >end_request: I/O error, dev sda2, sector 5208 > >end_request: I/O error, dev sda2, sector 5296 > >end_request: I/O error, dev sda2, sector 5384 > >end_request: I/O error, dev sda2, sector 5392 > >end_request: I/O error, dev sda2, sector 5424 > >end_request: I/O error, dev sda2, sector 5464 > >end_request: I/O error, dev sda2, sector 5552 > >end_request: I/O error, dev sda2, sector 5640 > >2097152+0 records in > >2097152+0 records out > >1073741824 bytes transferred in 10.769949 seconds (99697949 bytes/sec) > > > >1 minute after problem. > >mg-gws:~# dd if=/dev/sda2 of=/dev/null > >2097152+0 records in > >2097152+0 records out > >1073741824 bytes transferred in 10.769949 seconds (99697949 bytes/sec) > > > >My xen config is as follows: > > > ># Creator: michael gregg > ># Creation Date: Wed Oct 26 11:51:54 PDT 2005 > ># contact email: mgregg -at- propel.com > ># created with: CreateXenVm mg-gws 192 michael gregg > ># > >vif = [''mac=42:42:00:80:01:92''] > >interface = "eth0" > >memory = 128 > >name = "mg-gws" > >kernel = "/boot/xen-linux-2.6.11-ocxenu" > >disk = [''phy:vg/mg-gws_data,sda1,w'' ,''phy:vg/mg-gws_swap,sda2,2''] > >root = "/dev/sda1" > ># assigned IP Address: 172.16.80.192 > > > > > >_______________________________________________ > >Xen-users mailing list > >Xen-users@lists.xensource.com > >http://lists.xensource.com/xen-users > > > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users