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Re: [Xen-devel] blktap2 problem with pvops kernel 2.6.32.13 and xen 4.0-rc1



On Sat, May 29, 2010 at 07:45:41AM -0700, Boris Derzhavets wrote:
> I've attempted to install Nexenta Core 3 image under Xen 4.0 (2.6.32.13 
> pvops) on top of F13. Sample nexenta3.cfg profile
> contains 4 lines like this:-
> 
> disk=['tat:tapdisk:vhd:/path/../disk.img,xvda,w'] ( from sample)
> 

Should be 'tap', not 'tat'.. 

-- Pasi

> It generates message
>  File 'vhd:/path/.../disk.img' doesn't exist.
> 
> Boris.
> P.S. It was already in one of the threads @xen-users.
> 
> --- On Sat, 5/29/10, Fantu <fantonifabio@xxxxxxxxxx> wrote:
> 
>   From: Fantu <fantonifabio@xxxxxxxxxx>
>   Subject: Re: [Xen-devel] blktap2 problem with pvops kernel 2.6.32.13 and 
> xen 4.0-rc1
>   To: xen-devel@xxxxxxxxxxxxxxxxxxx
>   Date: Saturday, May 29, 2010, 10:33 AM
> 
>   Sorry, i wrong to write, is 4.0.1-rc1, i have always take from
>   xen-4.0-testing.hg last weeks about xen 4
>   Yesterday i have try tap2:aio in cfg files and work, is blktap how not work
>   with lenny, pv_ops kernel and xen 3.4.3 or 4.0
>   With tap2:aio minor ram used by dom0 but i see minor performance on domU
>   (mainly on start)
>   All important fix do in unstable are merged with xen-4.0-testing.hg?
> 
>   Pasi Kärkkäinen wrote:
>   >
>   > On Fri, May 28, 2010 at 04:27:33AM -0700, Fantu wrote:
>   >>
>   >> thanks for reply
>   >>
>   >> About blktap i not uderstand, always this error:
>   >> May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:790:
>   >> blktapctrl:
>   >> v1.0.0
>   >> May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:792: Found
>   >> driver:
>   >> [raw image (aio)]
>   >> May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:792: Found
>   >> driver:
>   >> [raw image (sync)]
>   >> May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:792: Found
>   >> driver:
>   >> [vmware image (vmdk)]
>   >> May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:792: Found
>   >> driver:
>   >> [ramdisk image (ram)]
>   >> May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:792: Found
>   >> driver:
>   >> [qcow disk (qcow)]
>   >> May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:792: Found
>   >> driver:
>   >> [qcow2 disk (qcow2)]
>   >> May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl_linux.c:92:
>   >> couldn't
>   >> find device number for 'blktap0'
>   >> May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:859: couldn't
>   >> open
>   >> blktap interface
>   >> May 28 12:05:56 cpmcOR01AV BLKTAPCTRL[2775]: blktapctrl.c:922: Unable to
>   >> start blktapctrl
>   >>
>   >> But module there is in kernel and is load (see lsmod) i have try also xen
>   >> 3.4.3, kernel 2.6.31 and 2.6.32 with some different config, always with
>   >> blktap option, also with =y and also try with sysfs deprecated option but
>   >> always nothing
>   >>
>   >
>   > Hmm.. are you really running Xen 4.0.0-rc1 ? If yes, then you should
>   > definitely
>   > upgrade to Xen 4.0.0 final, or even better, to Xen 4.0.1-rc1.
>   >
>   > There was some dom0 memory corruption bug fixed around Xen 4.0.0-rc6.
>   >
>   > About your blktap2 problems.. dunno really. I'll try it myself some day
>   > and
>   > let's see how it goes.
>   >
>   > -- Pasi
>   >
>   >> I found also 1 problem on save of 1 domU and some of this line in log:
>   >> May 28 12:55:35 cpmcOR01AV kernel: [ 3000.882349] hrtimer: interrupt took
>   >> 4279522 ns
>   >>
>   >> Here the syslog and kern.log if can help:
>   >> [1]http://old.nabble.com/file/p28705622/kern.log kern.log
>   >> [2]http://old.nabble.com/file/p28705622/syslog syslog
>   >> And xend.log when stop some minute for problem on one domU save:
>   >> [3]http://old.nabble.com/file/p28705622/xend.log xend.log
>   >>
>   >>
>   >> Pasi Kärkkäinen wrote:
>   >> >
>   >> > On Fri, May 28, 2010 at 02:45:04AM -0700, Fantu wrote:
>   >> >>
>   >> >> Server is Dell T610 with last bios (2.0.13)
>   >> >> Dom0: Lenny 64 bit, kernel 2.6.32.13, xen 4.0-rc1
>   >> >> Kernel is last commit of jeremy git xen/stable-2.6.32.x with this
>   >> config:
>   >> >> [4]http://old.nabble.com/file/p28704783/config-2.6.32.13 
> config-2.6.32.13
>   >> >> lspci -vvv:  [5]http://old.nabble.com/file/p28704783/lspcivvv.log
>   >> >> lspcivvv.log
>   >> >> dmidecode:  [6]http://old.nabble.com/file/p28704783/dmidecode.log
>   >> >> dmidecode.log
>   >> >> dmesg:  [7]http://old.nabble.com/file/p28704783/dmesg dmesg
>   >> >> lsmod:  [8]http://old.nabble.com/file/p28704783/lsmod.log lsmod.log
>   >> >> xend log:  [9]http://old.nabble.com/file/p28704783/xend.log xend.log
>   >> >> menu.lst:
>   >> >> title           Xen 4 / Debian GNU/Linux, kernel 2.6.32.13
>   >> >> root            (hd0,0)
>   >> >> kernel          /boot/xen.gz dom0_mem=2560M
>   >> >> module          /boot/vmlinuz-2.6.32.13 root=LABEL=root-backup2 ro
>   >> >> nomodeset
>   >> >> module          /boot/initrd.img-2.6.32.13
>   >> >>
>   >> >> The server run 12 domU windows xp with gplpv 0.11.0.213, all work
>   >> >> On dom0 blktap not work (write about in other topic) and i must chage
>   >> >> domU
>   >> >> disk from tap:aio to file, is one or the problem about performance?
>   >> >> With not set of dom0 memory and dom0 balloning have "freeze" with last
>   >> >> msg
>   >> >> calltrace about out of memory, i set dom0 memory in menu.lst and
>   >> disable
>   >> >> dom0 balloning, is necessary more ram that 2.5gb for dom0?
>   >> >>
>   >> >
>   >> > You really don't need 2,5 GB for dom0.
>   >> > Start with 1024 MB. You might be able to go down to 512 MB or so.
>   >> >
>   >> > It really depends what kind of tools you run in dom0.
>   >> >
>   >> > Also remember that file: driver for guest disks uses dom0 page cache,
>   >> > so it may appear that a lot of dom0 memory is used when using file:
>   >> driver
>   >> > since dom0 page cache will use *all* the free memory.. so increasing
>   >> > dom0 memory just makes you use more of the memory as cache.
>   >> >
>   >> > You really should get tap:aio: working instead. But I guess you open
>   >> > another
>   >> > thread about it.
>   >> >
>   >> >> There are some option in .config of kernel wrong or not good?
>   >> >> with c state option in bios enable system is inusable, now i disable
>   >> it
>   >> >> but
>   >> >> this is kernel, xen or bios problem?
>   >> >>
>   >> >> I hope this information helps improve the kernel and xen, tell me if
>   >> need
>   >> >> another information
>   >> >>
>   >> >> Thanks for any reply about my questions
>   >> >>
>   >> >
>   >> > -- Pasi
>   >> >
>   >> >
>   >> > _______________________________________________
>   >> > Xen-devel mailing list
>   >> > [10]Xen-devel@xxxxxxxxxxxxxxxxxxx
>   >> > [11]http://lists.xensource.com/xen-devel
>   >> >
>   >> >
>   >>
>   >> --
>   >> View this message in context:
>   >>
>   
> [12]http://old.nabble.com/Low-performance-and-some-problem-with-kernel-2.6.32.13-and-xen-4.0-rc1-tp28704783p28705622.html
>   >> Sent from the Xen - Dev mailing list archive at Nabble.com.
>   >>
>   >>
>   >> _______________________________________________
>   >> Xen-devel mailing list
>   >> [13]Xen-devel@xxxxxxxxxxxxxxxxxxx
>   >> [14]http://lists.xensource.com/xen-devel
>   >
>   > _______________________________________________
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>   > [15]Xen-devel@xxxxxxxxxxxxxxxxxxx
>   > [16]http://lists.xensource.com/xen-devel
>   >
>   >
> 
>   --
>   View this message in context:
>   
> [17]http://old.nabble.com/Low-performance-and-some-problem-with-kernel-2.6.32.13-and-xen-4.0-rc1-tp28704783p28716348.html
>   Sent from the Xen - Dev mailing list archive at Nabble.com.
> 
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> 
> References
> 
>    Visible links
>    1. http://old.nabble.com/file/p28705622/kern.log
>    2. http://old.nabble.com/file/p28705622/syslog
>    3. http://old.nabble.com/file/p28705622/xend.log
>    4. http://old.nabble.com/file/p28704783/config-2.6.32.13
>    5. http://old.nabble.com/file/p28704783/lspcivvv.log
>    6. http://old.nabble.com/file/p28704783/dmidecode.log
>    7. http://old.nabble.com/file/p28704783/dmesg
>    8. http://old.nabble.com/file/p28704783/lsmod.log
>    9. http://old.nabble.com/file/p28704783/xend.log
>   10. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>   11. http://lists.xensource.com/xen-devel
>   12. 
> http://old.nabble.com/Low-performance-and-some-problem-with-kernel-2.6.32.13-and-xen-4.0-rc1-tp28704783p28705622.html
>   13. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>   14. http://lists.xensource.com/xen-devel
>   15. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>   16. http://lists.xensource.com/xen-devel
>   17. 
> http://old.nabble.com/Low-performance-and-some-problem-with-kernel-2.6.32.13-and-xen-4.0-rc1-tp28704783p28716348.html
>   18. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>   19. http://lists.xensource.com/xen-devel

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