Nathan March
2011-Apr-01 20:42 UTC
[Xen-devel] 4.1 xend not starting - looking for /sys/devices/xen-backend/? Wrong kernel?
Hoping someone can shed some light on this since I''m finding myself
very
confused by a mismatch of documentation on the wiki/mailing lists. Am I
just using the wrong kernel?
Trying to start xend 4.1 it just hangs, strace shows this repeating over
and over:
3827 stat("/sys/devices/xen-backend/", 0x7f68b23eb9f0) = -1 ENOENT
(No
such file or directory)
3827 stat("/proc/net/dev", {st_mode=S_IFREG|0444, st_size=0, ...}) =
0
3827 gettimeofday({1301688232, 369752}, NULL) = 0
3827 open("/proc/net/dev", O_RDONLY) = 19
3827 fstat(19, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
3827 fstat(19, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
3827 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x7f68b9005000
3827 read(19, "Inter-| Receive "..., 8192) = 815
3827 read(19, "", 7168) = 0
3827 read(19, "", 8192) = 0
3827 close(19) = 0
3827 munmap(0x7f68b9005000, 4096) = 0
3827 stat("/proc/net/dev", {st_mode=S_IFREG|0444, st_size=0, ...}) =
0
3827 gettimeofday({1301688232, 370994}, NULL) = 0
3827 open("/proc/net/dev", O_RDONLY) = 19
3827 fstat(19, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
3827 fstat(19, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
3827 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x7f68b9005000
3827 read(19, "Inter-| Receive "..., 8192) = 815
3827 read(19, "", 7168) = 0
3827 read(19, "", 8192) = 0
3827 close(19) = 0
3827 munmap(0x7f68b9005000, 4096) = 0
3827 select(0, NULL, NULL, NULL, {2, 0}) = 0 (Timeout)
3827 ioctl(17, SNDCTL_DSP_RESET, 0x7f68b23ebc20) = 0
3827 ioctl(17, SNDCTL_DSP_RESET, 0x7f68b23ebc20) = -1 ESRCH (No such
process)
3827 ioctl(17, SNDCTL_DSP_RESET, 0x7f68b23ebcc0) = 0
3827 ioctl(17, SNDCTL_DSP_RESET, 0x7f68b23ebc80) = 0
3827 gettimeofday({1301688234, 374799}, NULL) = 0
>From what I can tell on the lists, /sys/devices/xen-backend/ is the new
location and /sys/bus/xen-backend/ is the old location? Does that mean
there''s a newer dom0 kernel with the correct paths inside of it?
I''ve tried stable-2.6.32.x and next-2.6.32 and both give the same
result. Trying next-2.6.39 resulted in reboot before booting the dom0
kernel, I haven''t debugged that any further yet.
The xen 4.1 documentation refers you to the 4.0.1 docs and the old
paravirtops page still has the same content it''s had forever, saying
that Jeremy''s stable-2.6.32.x is the recommended release. Should I be
using one of Konrad''s branches instead?
It seems very strange to me that xen 4.1 would be considered ready &
released in a state like this, with no clear documentation on what dom0
to use.
- Nathan
--
Nathan March <nathan@gt.net>
Gossamer Threads Inc. http://www.gossamer-threads.com/
Tel: (604) 687-5804 Fax: (604) 687-5806
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel
Konrad Rzeszutek Wilk
2011-Apr-01 21:05 UTC
Re: [Xen-devel] 4.1 xend not starting - looking for /sys/devices/xen-backend/? Wrong kernel?
On Fri, Apr 01, 2011 at 01:42:03PM -0700, Nathan March wrote:> Hoping someone can shed some light on this since I''m finding myself very > confused by a mismatch of documentation on the wiki/mailing lists. Am I > just using the wrong kernel? > > Trying to start xend 4.1 it just hangs, strace shows this repeating over > and over: > > 3827 stat("/sys/devices/xen-backend/", 0x7f68b23eb9f0) = -1 ENOENT (No > such file or directory) > 3827 stat("/proc/net/dev", {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 > 3827 gettimeofday({1301688232, 369752}, NULL) = 0 > 3827 open("/proc/net/dev", O_RDONLY) = 19 > 3827 fstat(19, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 > 3827 fstat(19, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 > 3827 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, > -1, 0) = 0x7f68b9005000 > 3827 read(19, "Inter-| Receive "..., 8192) = 815 > 3827 read(19, "", 7168) = 0 > 3827 read(19, "", 8192) = 0 > 3827 close(19) = 0 > 3827 munmap(0x7f68b9005000, 4096) = 0 > 3827 stat("/proc/net/dev", {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 > 3827 gettimeofday({1301688232, 370994}, NULL) = 0 > 3827 open("/proc/net/dev", O_RDONLY) = 19 > 3827 fstat(19, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 > 3827 fstat(19, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 > 3827 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, > -1, 0) = 0x7f68b9005000 > 3827 read(19, "Inter-| Receive "..., 8192) = 815 > 3827 read(19, "", 7168) = 0 > 3827 read(19, "", 8192) = 0 > 3827 close(19) = 0 > 3827 munmap(0x7f68b9005000, 4096) = 0 > 3827 select(0, NULL, NULL, NULL, {2, 0}) = 0 (Timeout) > 3827 ioctl(17, SNDCTL_DSP_RESET, 0x7f68b23ebc20) = 0 > 3827 ioctl(17, SNDCTL_DSP_RESET, 0x7f68b23ebc20) = -1 ESRCH (No such > process) > 3827 ioctl(17, SNDCTL_DSP_RESET, 0x7f68b23ebcc0) = 0 > 3827 ioctl(17, SNDCTL_DSP_RESET, 0x7f68b23ebc80) = 0 > 3827 gettimeofday({1301688234, 374799}, NULL) = 0 > > >From what I can tell on the lists, /sys/devices/xen-backend/ is the new > location and /sys/bus/xen-backend/ is the old location? Does that mean > there''s a newer dom0 kernel with the correct paths inside of it? > > I''ve tried stable-2.6.32.x and next-2.6.32 and both give the same > result. Trying next-2.6.39 resulted in reboot before booting the dom0 > kernel, I haven''t debugged that any further yet.That might be related to how much memory you have. There is a bug that if you have more than 4GB physical memory it won''t boot.> > The xen 4.1 documentation refers you to the 4.0.1 docs and the old > paravirtops page still has the same content it''s had forever, saying > that Jeremy''s stable-2.6.32.x is the recommended release. Should I be > using one of Konrad''s branches instead?either one ought to work.> > It seems very strange to me that xen 4.1 would be considered ready & > released in a state like this, with no clear documentation on what dom0 > to use.Not sure why it checks /sys/devices/xen-backend/.. have you tried to use xl instead? _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Nathan March
2011-Apr-01 21:21 UTC
Re: [Xen-devel] 4.1 xend not starting - looking for /sys/devices/xen-backend/? Wrong kernel?
On 4/1/2011 2:05 PM, Konrad Rzeszutek Wilk wrote:> Not sure why it checks /sys/devices/xen-backend/.. have you tried to > use xl instead?*sigh*, looks like it was a red herring. I apparently fixed my problem at some earlier point (probably a dom0 kernel issue) and had thought xend was still having issues. Even with that error happening I''m still able to successfully start a VM. Thanks for the attempt at helping, I should have tested more before posting =) - Nathan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel