I have never been able to get tap:aio devices running. When I try it in a Linux PV domain, it says: XENBUS: Waiting for devices to initialise: 295s... And they don''t work in my GPLPV drivers, which is the problem I am trying to solve, but I''d like to see them work under Linux first. Is there anything extra I need to do? I have loaded the xenblktap module (forgot to do this initially...) Thanks James _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Tue, Dec 30, 2008 at 10:12 PM, James Harper < james.harper@bendigoit.com.au> wrote:> I have never been able to get tap:aio devices running. When I try it in > a Linux PV domain, it says: > > XENBUS: Waiting for devices to initialise: 295s... > > And they don''t work in my GPLPV drivers, which is the problem I am > trying to solve, but I''d like to see them work under Linux first. > > Is there anything extra I need to do? I have loaded the xenblktap module > (forgot to do this initially...) > > Thanks > > James > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >You need to tell us a bit more about your setup such as DOM0 OS and xen version. I never used to have any luck with tap:aio but I only use Xen 3.3 now and only use tap:aio instead of tap:file which is really nice when you have 30 or more DomUs you don''t run out of loop devices. Grant McWilliams Some people, when confronted with a problem, think "I know, I''ll use Windows." Now they have two problems. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> > You need to tell us a bit more about your setup such as DOM0 OS andxen> version. I never used to have any luck with tap:aio but I only use Xen3.3> now and only use tap:aio instead of tap:file which is really nicewhen> you have 30 or more DomUs you don''t run out of loop devices. >I am using xen-3.3-testing from a few weeks ago. James _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> > > > > You need to tell us a bit more about your setup such as DOM0 OS and > xen > > version. I never used to have any luck with tap:aio but I only useXen> 3.3 > > now and only use tap:aio instead of tap:file which is really nice > when > > you have 30 or more DomUs you don''t run out of loop devices. > > > > I am using xen-3.3-testing from a few weeks ago. >Found the problem - blktapctrl wasn''t running. I assume it didn''t start because the module wasn''t loaded when xend was started. It appears to be all working now. A message in the logs like "blktapctrl isn''t running" would have been really useful :) Thanks James _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> > Found the problem - blktapctrl wasn''t running. I assume it didn''tstart> because the module wasn''t loaded when xend was started. > > It appears to be all working now. A message in the logs like"blktapctrl> isn''t running" would have been really useful :) >Btw, it is better to use tap:aio or phy where the underlying device is a LVM logical volume? Thanks James _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi, I have a question about the switch /gplpv in boot.ini I see that some of the pv driver code is looking at this option; is there is any other piece of code that looks at this option before the drivers get loaded and perhaps change the bootpath or do something fancy? Thanks in advance, Udas _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Tue, Dec 30, 2008 at 11:30 PM, James Harper < james.harper@bendigoit.com.au> wrote:> > > > Found the problem - blktapctrl wasn''t running. I assume it didn''t > start > > because the module wasn''t loaded when xend was started. > > > > It appears to be all working now. A message in the logs like > "blktapctrl > > isn''t running" would have been really useful :) > > > > Btw, it is better to use tap:aio or phy where the underlying device is a > LVM logical volume? > > Thanks > > James >Was that a question? :-) Use phy for LVM logical volumes and tap:aio if it''s a file on ANY partition (LV or otherwise). I''ve done speed tests with both LVs and diskfiles and the LVs are faster but they don''t trounce the tap:aio disk file like you''d think. In several tests the file was equal to the LVM volume. Grant McWilliams Some people, when confronted with a problem, think "I know, I''ll use Windows." Now they have two problems. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> > Btw, it is better to use tap:aio or phy where the underlying device > > is a LVM logical volume? > > Was that a question? :-)Yes. s/it is/is it/ :)> Use phy for LVM logical volumes and tap:aio if > it''s a file on ANY partition (LV or otherwise). I''ve done speed testswith> both LVs and diskfiles and the LVs are faster but they don''t trouncethe> tap:aio disk file like you''d think. In several tests the file wasequal to> the LVM volume.Thanks for the confirmation. I just tried doing the backup exec restore using tap:aio instead of file, but the DomU hung almost immediately (after about 500MB of restoring). Could be my GPLPV drivers... James _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users