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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] XEN 4.0.2-rc2 - using OCAML xenstored -- xend not starting?
On Wed, Feb 09, 2011 at 08:39:37PM -0800, Yuvraj Agarwal wrote:
> Hi All,
>
>
>
> I did some further debugging and am attaching some more information here.
> Any help is appreciated of course. Out of curiosity, are we amongst the
> few people who are trying to use the OCAML version of xenstored?
>
At least Citrix XenServer and XCP do use oxenstored..
-- Pasi
> If I change the Config.mk to disable building the OCAML version of
> xenstored xend starts up and I can do "xm info" and everything works fine.
>
>
>
> If I build the OCAML version of xenstored instead, I get the "xend is not
> started error" even though I see two xend processes.
>
> Furthermore, if I run the OCAML xentored with an strace, I get the
> following error:
>
>
>
> "strace -f /usr/bin/xenstored --no-fork"
>
>
>
> open("/dev/xen/eventchn", O_RDWR) = 6
>
> open("/proc/xen/xsd_port", O_RDONLY) = 7
>
> read(7, "145", 20) = 3
>
> close(7) = 0
>
> open("/proc/xen/xsd_kva", O_RDWR) = 7
>
> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 7, 0) = 0x7f2a4f682000
>
> close(7) = 0
>
> ioctl(6, EVIOCGVERSION, 0x7fff86ad7320) = -1 ENOTTY (Inappropriate ioctl
> for device)
>
> write(2, "Fatal error: exception Failure(\""..., 64Fatal error: exception
> Failure("ioctl bind_interdomain failed")
>
> ) = 64
>
> exit_group(2) = ?
>
>
>
> thanks
>
> Yuvraj
>
>
>
>
>
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Yuvraj Agarwal
> Sent: Wednesday, February 09, 2011 10:26 AM
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Cc: Asim
> Subject: RE: [Xen-devel] XEN 4.0.2-rc2 - using OCAML xenstored -- xend not
> starting?
>
>
>
> I did some more debugging and based on some of the instructions on
> [1]http://wiki.xen.org/xenwiki/XenParavirtOps I found out that I may have
> been missing the "gntdev" module.
>
> I rebuilt the kernel and added that in (part of the kernel rather than as
> a separate module), but still have the same issues. Adding some more
> debugging information:
>
>
>
> root@nor:/home/yuvraj# cat /proc/misc
>
> 54 network_throughput
>
> 55 network_latency
>
> 56 cpu_dma_latency
>
> 57 device-mapper
>
> 221 mpt2ctl
>
> 144 nvram
>
> 228 hpet
>
> 58 blktap-control
>
> 59 gntdev
>
> 60 evtchn
>
> 61 autofs
>
> 231 snapshot
>
> 184 microcode
>
> 227 mcelog
>
> 62 rfkill
>
> 63 vga_arbiter
>
> root@nor:/home/yuvraj# ll /dev/xen/
>
> total 0
>
> drwxr-xr-x 2 root root 80 2011-02-08 22:07 ./
>
> drwxr-xr-x 17 root root 6120 2011-02-08 22:07 ../
>
> crw-r----- 1 root root 10, 63 2011-02-08 22:07 eventchn
>
> crw-rw---- 1 root root 10, 60 2011-02-08 22:07 evtchn
>
> root@nor:/home/yuvraj#
>
>
>
> Seems like I am missing the /dev/xen/gntdev entries? Shouldn't these be
> created automatically?
>
> Thanks
>
> Yuvraj
>
>
>
> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Yuvraj Agarwal
> Sent: Tuesday, February 08, 2011 9:02 AM
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-devel] XEN 4.0.2-rc2 - using OCAML xenstored -- xend not
> starting?
>
>
>
> Hi All,
>
>
>
> I just tried a new installation of Ubuntu 10.04 (64bit) + Xen and am
> having some trouble starting XEN. I am using the latest mercurial checkout
>
> (4.0.2-rc2) and the only change I made was to Config.mk to enable building
> the OCAML version of xenstored. " CONFIG_OCAML_XENSTORED ?= y". I am using
> the same kernel I built earlier for a similar Ubuntu 10.04-64bit / Xen
>
> 4.0.0 installation (version 2.6.32.12). I would like to use the OCAML
> version of xenstored since it is supposed to be much better/faster when
> starting up a larger number of domUs.
>
>
>
> The system starts up, and I can see xend started up, but when I do "xm
> list" or "xm info" I get an error message that xend has not started up?
>
>
>
> root@EM:/etc# xm list
>
> Error: Unable to connect to xend: No such file or directory. Is xend
> running?
>
> root@EM:/etc#
>
>
>
> root@EM:/etc# ps -efw | grep xen
>
> root 88 2 0 Feb07 ? 00:00:00 [xenwatch]
>
> root 89 2 0 Feb07 ? 00:00:00 [xenbus]
>
> root 6254 1 0 Feb07 ? 00:00:00 /usr/bin/python
>
> /usr/sbin/xend start
>
> root 6255 6254 0 Feb07 ? 00:00:17 /usr/bin/python
>
> /usr/sbin/xend start
>
> root 7043 5919 0 08:55 pts/2 00:00:00 grep --color=auto xen
>
> root@EM:/etc#
>
>
>
> root@EM:/etc# uname -a
>
> Linux EM 2.6.32.12 #11 SMP Fri Jun 18 20:52:17 PDT 2010 x86_64 GNU/Linux
> root@EM:/etc#
>
>
>
> I did check and found two difference with my earlier installation of Xen
>
> 4.0.0 with the same kernel (although with the standard xenstored).
>
> 1. The xen 4.0 installation does show a "xenstored" process also running
> in addition to these ones.
>
> 2. "xend" seems to be looking for a directory, " /var/lib/xenstored" that
> doesn't seem to exist on my system?
>
>
>
> Any pointers to fix this issue?
>
>
>
> Thanks!
>
> Yuvraj
>
>
>
> _______________________________________________
>
> Xen-devel mailing list
>
> [2]Xen-devel@xxxxxxxxxxxxxxxxxxx
>
> [3]http://lists.xensource.com/xen-devel
>
> References
>
> Visible links
> 1. http://wiki.xen.org/xenwiki/XenParavirtOps
> 2. mailto:Xen-devel@xxxxxxxxxxxxxxxxxxx
> 3. http://lists.xensource.com/xen-devel
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
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