user-mode-linux-user

[uml-user] [PATCH net-next 0/8] etherdevice: Rename random_ether_addr to eth_random_addr

[Joe P. <jo...@pe...>]

net-next commit ad7eee98be ("etherdevice: introduce eth_broadcast_addr")
added a new style API.  Rename random_ether_addr to eth_random_addr to
create some API symmetry.

Joe Perches (8):
  etherdevice: Rename random_ether_addr to eth_random_addr
  ethernet: Use eth_random_addr
  net: usb: Use eth_random_addr
  wireless: Use eth_random_addr
  drivers/net: Use eth_random_addr
  s390: Use eth_random_addr
  usb: Use eth_random_addr
  arch: Use eth_random_addr

 arch/blackfin/mach-bf537/boards/stamp.c           |    2 +-
 arch/c6x/kernel/soc.c                             |    2 +-
 arch/mips/ar7/platform.c                          |    4 ++--
 arch/mips/powertv/powertv_setup.c                 |    6 +++---
 arch/um/drivers/net_kern.c                        |    2 +-
 drivers/net/ethernet/atheros/atl1c/atl1c_hw.c     |    2 +-
 drivers/net/ethernet/atheros/atlx/atl1.c          |    2 +-
 drivers/net/ethernet/atheros/atlx/atl2.c          |    2 +-
 drivers/net/ethernet/ethoc.c                      |    2 +-
 drivers/net/ethernet/intel/igb/igb_main.c         |    4 ++--
 drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c    |    2 +-
 drivers/net/ethernet/lantiq_etop.c                |    2 +-
 drivers/net/ethernet/micrel/ks8851.c              |    2 +-
 drivers/net/ethernet/micrel/ks8851_mll.c          |    2 +-
 drivers/net/ethernet/smsc/smsc911x.c              |    2 +-
 drivers/net/ethernet/ti/cpsw.c                    |    2 +-
 drivers/net/ethernet/tile/tilegx.c                |    2 +-
 drivers/net/ethernet/wiznet/w5100.c               |    2 +-
 drivers/net/ethernet/wiznet/w5300.c               |    2 +-
 drivers/net/ethernet/xilinx/xilinx_axienet_main.c |    2 +-
 drivers/net/tun.c                                 |    2 +-
 drivers/net/usb/smsc75xx.c                        |    2 +-
 drivers/net/usb/smsc95xx.c                        |    2 +-
 drivers/net/usb/usbnet.c                          |    2 +-
 drivers/net/wimax/i2400m/driver.c                 |    2 +-
 drivers/net/wireless/adm8211.c                    |    2 +-
 drivers/net/wireless/p54/eeprom.c                 |    2 +-
 drivers/net/wireless/rt2x00/rt2400pci.c           |    2 +-
 drivers/net/wireless/rt2x00/rt2500pci.c           |    2 +-
 drivers/net/wireless/rt2x00/rt2500usb.c           |    2 +-
 drivers/net/wireless/rt2x00/rt2800lib.c           |    2 +-
 drivers/net/wireless/rt2x00/rt61pci.c             |    2 +-
 drivers/net/wireless/rt2x00/rt73usb.c             |    2 +-
 drivers/net/wireless/rtl818x/rtl8180/dev.c        |    2 +-
 drivers/net/wireless/rtl818x/rtl8187/dev.c        |    2 +-
 drivers/s390/net/qeth_l2_main.c                   |    2 +-
 drivers/s390/net/qeth_l3_main.c                   |    2 +-
 drivers/usb/atm/xusbatm.c                         |    4 ++--
 drivers/usb/gadget/u_ether.c                      |    2 +-
 include/linux/etherdevice.h                       |   14 ++++++++------
 40 files changed, 52 insertions(+), 50 deletions(-)

-- 
1.7.8.111.gad25c.dirty

Re: [uml-user] John Stultz' leap second check program lets an UML clock jump by few hours

[Toralf F. <tor...@gm...>]

On 07/10/2012 02:45 PM, Toralf Förster wrote:
> Now I'm wondering whether it is worth to care about it or not.
Erm - host shows same behaviour ... so it is not an UML issue

-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

Re: [uml-user] John Stultz' leap second check program lets an UML clock jump by few hours

[Toralf F. <tor...@gm...>]

On 07/11/2012 01:30 AM, richard -rw- weinberger wrote:
> On Tue, Jul 10, 2012 at 2:45 PM, Toralf Förster <tor...@gm...> wrote:
>> I tested the script of John Stultz (https://lkml.org/lkml/2012/7/1/203)
>> at a UML of an unstable Gentoo Linux with recent host
>> kernel linux-v3.5-rc5-98-g9e85a6f
>> (without his proposed patches) and observed the following time jump of
>> roughly 2 1/2 hours :
> 
> I don't know what John's programing is exactly doing.
> What is the expected result?
> 
I wouldn't expeczt more than 1 seconds time shift from the program
(attached for convenience)

-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

Re: [uml-user] John Stultz' leap second check program lets an UML clock jump by few hours

[richard -r. w. <ric...@gm...>]

On Tue, Jul 10, 2012 at 2:45 PM, Toralf Förster <tor...@gm...> wrote:
> I tested the script of John Stultz (https://lkml.org/lkml/2012/7/1/203)
> at a UML of an unstable Gentoo Linux with recent host
> kernel linux-v3.5-rc5-98-g9e85a6f
> (without his proposed patches) and observed the following time jump of
> roughly 2 1/2 hours :

I don't know what John's programing is exactly doing.
What is the expected result?

-- 
Thanks,
//richard

[uml-user] John Stultz' leap second check program lets an UML clock jump by few hours

[Toralf F. <tor...@gm...>]

I tested the script of John Stultz (https://lkml.org/lkml/2012/7/1/203)
at a UML of an unstable Gentoo Linux with recent host
kernel linux-v3.5-rc5-98-g9e85a6f
(without his proposed patches) and observed the following time jump of
roughly 2 1/2 hours :

# /mnt/n22/home/tfoerste/a
1341446400:46860754
1341446400:46867754
...
1341446400:47172756
--------------------
1341446400:47179756
1341446399:47227757
--------------------
1341446399:283327230
...
1341446399:283555228
1341446399:283574228
1341446399:283593228
Delta: 999951999 ns


Here're the syslog lines :

Jul  4 22:22:18 n22_uml courierd: SHUTDOWN: Stopping...
Jul  5 01:59:59 n22_uml kernel: Clock: inserting leap second 23:59:60 UTC


Now I'm wondering whether it is worth to care about it or not.


-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

Re: [uml-user] entropy hole in UML instances too

[Toralf F. <tor...@gm...>]

On 07/08/2012 11:44 AM, richard -rw- weinberger wrote:
> On Sun, Jul 8, 2012 at 1:21 AM, Paolo Giarrusso <p.g...@gm...> wrote:
> 
> Nice to hear from you Paolo, are you planning to work again on UML? :)
> 
> 
> It's CONFIG_UML_RANDOM.
> Toralf, is it enabled in your config?
> 
Gah - it is not enabled ...

-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

Re: [uml-user] entropy hole in UML instances too

[richard -r. w. <ric...@gm...>]

On Sun, Jul 8, 2012 at 1:21 AM, Paolo Giarrusso <p.g...@gm...> wrote:

Nice to hear from you Paolo, are you planning to work again on UML? :)

> Yep - entropy comes from hardware interrupts, and UML doesn't have
> enough such interrupts, as far as I remember; I think interrupts might
> be individually marked as usable to produce entropy. I remember that
> before I stopped development, a UML driver was introduced to allow UML
> to feed on the host's entropy by reading the host's /dev/random.

It's CONFIG_UML_RANDOM.
Toralf, is it enabled in your config?

-- 
Thanks,
//richard

Re: [uml-user] entropy hole in UML instances too

[Paolo G. <p.g...@gm...>]

On Sat, Jul 7, 2012 at 11:58 PM, Toralf Förster <tor...@gm...> wrote:
> I think, that the discussed hole is related to UML too (or at least was
> related in the past).
> IIRC when I booted a freshly created UML image for the first time - it
> hang in the boot phase for a looong time for the creation of
> public/private keys of an applciation (either apache2 or courier, but I
> do not remember).
> While this behaviour itself was good (the application still waited b/c
> /dev/random blocked I was explained) - it indicated too less entropy
> during boot of UML too, isn't it ?

Yep - entropy comes from hardware interrupts, and UML doesn't have
enough such interrupts, as far as I remember; I think interrupts might
be individually marked as usable to produce entropy. I remember that
before I stopped development, a UML driver was introduced to allow UML
to feed on the host's entropy by reading the host's /dev/random.

Not sure about the current status of all this, though.

-- 
Paolo Giarrusso - Ph.D. Student
http://www.informatik.uni-marburg.de/~pgiarrusso/

[uml-user] entropy hole in UML instances too

[Toralf F. <tor...@gm...>]

I think, that the discussed hole is related to UML too (or at least was
related in the past).
IIRC when I booted a freshly created UML image for the first time - it
hang in the boot phase for a looong time for the creation of
public/private keys of an applciation (either apache2 or courier, but I
do not remember).
While this behaviour itself was good (the application still waited b/c
/dev/random blocked I was explained) - it indicated too less entropy
during boot of UML too, isn't it ?

-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

Re: [uml-user] UML is wonderful !!!

[richard -r. w. <ric...@gm...>]

On Thu, Jul 5, 2012 at 10:58 PM, Chris Frey <cd...@fo...> wrote:
> On Thu, Jul 05, 2012 at 04:38:51PM +0200, richard -rw- weinberger wrote:
>> The article describes nothing that is not also doable with KVM these days.
>> Anyway, UML is fun and nice to use. :-)
>
> Doesn't KVM require the extra VM CPU features?  For older CPU's, I thought
> UML was more efficient.

Sure, to run KVM you need a modern CPU (kind of).
Even my netbook supports KVM...

But you can use UML on system where you are not root and the admin has not
enabled KVM for users.

-- 
Thanks,
//richard

Re: [uml-user] UML is wonderful !!!

[Chris F. <cd...@fo...>]

On Thu, Jul 05, 2012 at 04:38:51PM +0200, richard -rw- weinberger wrote:
> The article describes nothing that is not also doable with KVM these days.
> Anyway, UML is fun and nice to use. :-)

Doesn't KVM require the extra VM CPU features?  For older CPU's, I thought
UML was more efficient.

Am I also out of date? :-)

Thanks,
- Chris

[uml-user] uml crashes with current kernel

[Toralf F. <tor...@gm...>]

Hello,


I'm unsure whether this is the known tty-related signal issue (host kernel is 3.4.4)

Nevertheless today I observed this crash :

Core was generated by `/usr/local/bin/linux-v3.5-rc5-98-g9e85a6f earlyprintk ubda=/home/tfoerste/virtu'.
Program terminated with signal 6, Aborted.
#0  0xb778c424 in __kernel_vsyscall ()
(gdb) bt
#0  0xb778c424 in __kernel_vsyscall ()
#1  0xb76533c6 in kill () at ../sysdeps/unix/syscall-template.S:82
#2  0x080749d5 in uml_abort () at arch/um/os-Linux/util.c:93
#3  0x08074d15 in os_dump_core () at arch/um/os-Linux/util.c:138
#4  0x080628c7 in panic_exit (self=0x83ac518, unused1=0, unused2=0x83cfaa0) at arch/um/kernel/um_arch.c:240
#5  0x0809f2ca in notifier_call_chain (nl=<optimized out>, val=0, v=0x83cfaa0, nr_to_call=-2, nr_calls=0x0)
    at kernel/notifier.c:93
#6  0x0809f413 in __atomic_notifier_call_chain (nr_calls=0x0, nr_to_call=-1, v=0x83cfaa0, val=0, nh=0x83cfa44)
    at kernel/notifier.c:182
#7  atomic_notifier_call_chain (nh=0x83cfa44, val=0, v=0x83cfaa0) at kernel/notifier.c:191
#8  0x083136ce in panic (fmt=0x8371d50 "Kernel mode fault at addr 0x%lx, ip 0x%lx") at kernel/panic.c:120
#9  0x0806248c in segv (fi=<incomplete type>, ip=0, is_user=0, regs=0x83aa5e0) at arch/um/kernel/trap.c:238
#10 0x080625d3 in segv_handler (sig=11, regs=0x83aa5e0) at arch/um/kernel/trap.c:184
#11 0x08073a5d in sig_handler_common (sig=11, mc=0x83aa920) at arch/um/os-Linux/signal.c:43
#12 0x08073bf2 in sig_handler (sig=11, mc=0x83aa920) at arch/um/os-Linux/signal.c:230
#13 0x0807372c in hard_handler (sig=<optimized out>, info=0x83aa88c, p=0x83aa90c) at arch/um/os-Linux/signal.c:164
#14 <signal handler called>
#15 0x00000000 in ?? ()
#16 0x080ca81f in mask_ack_irq (desc=0x83b5240) at kernel/irq/chip.c:234
#17 handle_edge_irq (irq=10, desc=0x83b5240) at kernel/irq/chip.c:493
#18 0x080c7dbe in generic_handle_irq_desc (desc=0x83b5240, irq=10) at include/linux/irqdesc.h:114
#19 generic_handle_irq (irq=10) at kernel/irq/irqdesc.c:314
#20 0x0805f015 in do_IRQ (irq=10, regs=0x83aa9e0) at arch/um/kernel/irq.c:294
#21 0x08062719 in winch (sig=28, regs=0x83aa9e0) at arch/um/kernel/trap.c:285
#22 0x08073a5d in sig_handler_common (sig=28, mc=0x83aad20) at arch/um/os-Linux/signal.c:43
#23 0x08073bf2 in sig_handler (sig=28, mc=0x83aad20) at arch/um/os-Linux/signal.c:230
#24 0x0807372c in hard_handler (sig=<optimized out>, info=0x83aac8c, p=0x83aad0c) at arch/um/os-Linux/signal.c:164
#25 <signal handler called>
#26 0xb778c424 in __kernel_vsyscall ()
#27 0xb76e95b3 in __read_nocancel () at ../sysdeps/unix/syscall-template.S:82
#28 0x08064b51 in read (__nbytes=1, __buf=0x20f82ecb, __fd=20) at /usr/include/bits/unistd.h:45
#29 generic_read (fd=20, c_out=0x20f82ecb "", unused=0x0) at arch/um/drivers/chan_user.c:26
#30 0x080651ba in winch_interrupt (irq=10, data=0x20dffc40) at arch/um/drivers/line.c:731
#31 0x080c842d in handle_irq_event_percpu (desc=0x83b5240, action=0x20dff400) at kernel/irq/handle.c:142
#32 0x080c8567 in handle_irq_event (desc=0x83b5240) at kernel/irq/handle.c:192
#33 0x080ca7df in handle_edge_irq (irq=10, desc=0x83b5240) at kernel/irq/chip.c:519
#34 0x080c7dbe in generic_handle_irq_desc (desc=0x83b5240, irq=10) at include/linux/irqdesc.h:114
#35 generic_handle_irq (irq=10) at kernel/irq/irqdesc.c:314
#36 0x0805f015 in do_IRQ (irq=10, regs=0x20f4de90) at arch/um/kernel/irq.c:294
#37 0x08062719 in winch (sig=28, regs=0x20f4de90) at arch/um/kernel/trap.c:285
#38 0x08076e25 in userspace (regs=0x20f4de90) at arch/um/os-Linux/skas/process.c:442
#39 0x0805fc94 in fork_handler () at arch/um/kernel/process.c:181
#40 0x00000000 in ?? ()

-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

Re: [uml-user] UML is wonderful !!!

[richard -r. w. <ric...@gm...>]

Hi!

On Thu, Jul 5, 2012 at 3:04 PM, James roben <jam...@gm...> wrote:
> All,
>
> I  recently read  an article in Linux Journal 2012 July issue about UML  (
> http://www.linuxjournaldigital.com/linuxjournal/201207?pg=60#pg60 ).  I
> really came to know the
> power of UML.  The first thing , i did was to subscribe to uml list . I
> love this stuff ( UML ). Thanks for  all
> the developers for making this wonderful thing.

It looks like you and the Linux Journal 2012 are five or ten years late. ;-)
UML had it's great years some time ago.

The article describes nothing that is not also doable with KVM these days.
Anyway, UML is fun and nice to use. :-)

-- 
Thanks,
//richard

[uml-user] UML is wonderful !!!

[James r. <jam...@gm...>]

All,

I  recently read  an article in Linux Journal 2012 July issue about UML  (
http://www.linuxjournaldigital.com/linuxjournal/201207?pg=60#pg60 ).  I
really came to know the
power of UML.  The first thing , i did was to subscribe to uml list . I
love this stuff ( UML ). Thanks for  all
the developers for making this wonderful thing.

-James

[uml-user] UML kernel debugging symbol...

[Tejas P. <pat...@ya...>]

Hi,

I installed UML aas per the instructions on uml website as below. Does it have debugging symbols built in to it
so that I can do gdb:

	* Download this kernel (or this one for 64-bit systems) and this filesystem (80M, uncompressing to 1.6G) (or this 64-bit filesystem)
	* Uncompress them:host% bunzip2 linux-2.6.24-rc7.bz2 FedoraCore5-x86-root_fs.bz2 
	* Run UML as follows:host% chmod 755 ./linux-2.6.24-rc7
host% ./linux-2.6.24-rc7 ubda=FedoraCore5-x86-root_fs mem=128M Boot log
	* Log in as root, no password needed:Fedora Core release 5 (Bordeaux)
Kernel 2.6.19-rc7 on an i686 localhost login: root
[root@localhost ~]# 
	* Explore!
	* When you're done, shut it down:[root@localhost ~]# halt Broadcast message from root (tty0) (Tue Apr  4 17:18:01 2006): The system is going down for system halt NOW!
INIT: Switching to runlevel: 0
INIT: Sending processes the TERM signal Shutdown log
Thanks.

[uml-user] [PATCH 07/12] um: remove km_type definitions

[Cong W. <am...@re...>]

Signed-off-by: Cong Wang <am...@re...>
---
 arch/um/include/asm/kmap_types.h |   18 +-----------------
 1 files changed, 1 insertions(+), 17 deletions(-)

diff --git a/arch/um/include/asm/kmap_types.h b/arch/um/include/asm/kmap_types.h
index 6c03acd..2e0a6b1 100644
--- a/arch/um/include/asm/kmap_types.h
+++ b/arch/um/include/asm/kmap_types.h
@@ -8,22 +8,6 @@
 
 /* No more #include "asm/arch/kmap_types.h" ! */
 
-enum km_type {
-	KM_BOUNCE_READ,
-	KM_SKB_SUNRPC_DATA,
-	KM_SKB_DATA_SOFTIRQ,
-	KM_USER0,
-	KM_USER1,
-	KM_UML_USERCOPY,	/* UML specific, for copy_*_user - used in do_op_one_page */
-	KM_BIO_SRC_IRQ,
-	KM_BIO_DST_IRQ,
-	KM_PTE0,
-	KM_PTE1,
-	KM_IRQ0,
-	KM_IRQ1,
-	KM_SOFTIRQ0,
-	KM_SOFTIRQ1,
-	KM_TYPE_NR
-};
+#define KM_TYPE_NR 14
 
 #endif
-- 
1.7.7.6

[uml-user] mconsole-exec-3.3.8.patch

[David F. <da...@di...>]

Hi,

In case anybody is interested, in the context of VNX project we have 
adapted the mconsole-exec patch to version 3.3.8 of kernel. This patch 
allows the execution of commands inside virtual machines from the host 
using uml_mconsole command.

You can find it here:

http://vnx.dit.upm.es/vnx/kernels/mconsole-exec-3.3.8.patch

Please, read the disclaimer inside the patch before using it.

Best regards,
David
Virtual Networks over linuX
http://vnx.dit.upm.es

Re: [uml-user] sysconf(_SC_NPROCESSORS_CONF) returns incorrect on UML (0)

[richard -r. w. <ric...@gm...>]

On Wed, Jun 6, 2012 at 4:15 PM, Lars Ekman G <lar...@er...> wrote:
>
> Hello,
>
> Yes, it works fine;
>

Okay, I'll queue this patch for -stable.

-- 
Thanks,
//richard

Re: [uml-user] sysconf(_SC_NPROCESSORS_CONF) returns incorrect on UML (0)

[Lars E. G <lar...@er...>]

Hello,

Yes, it works fine;

/ # /hostfs/numcpu 
_SC_NPROCESSORS_CONF = 1
_SC_NPROCESSORS_ONLN = 1

Thanks,
Lars Ekman 

-----Original Message-----
From: richard -rw- weinberger [mailto:ric...@gm...] 
Sent: den 6 juni 2012 15:17
To: Lars Ekman G
Cc: use...@li...
Subject: Re: [uml-user] sysconf(_SC_NPROCESSORS_CONF) returns incorrect on UML (0)

On Wed, Jun 6, 2012 at 1:33 PM, richard -rw- weinberger <ric...@gm...> wrote:
> Okay, I have an idea what's going on.
> I'll send a patch ASAP.
>

Does the attached patch solve the problem?

--
Thanks,
//richard

Re: [uml-user] sysconf(_SC_NPROCESSORS_CONF) returns incorrect on UML (0)

[richard -r. w. <ric...@gm...>]

On Wed, Jun 6, 2012 at 1:33 PM, richard -rw- weinberger
<ric...@gm...> wrote:
> Okay, I have an idea what's going on.
> I'll send a patch ASAP.
>

Does the attached patch solve the problem?

-- 
Thanks,
//richard

Re: [uml-user] sysconf(_SC_NPROCESSORS_CONF) returns incorrect on UML (0)

[richard -r. w. <ric...@gm...>]

On Wed, Jun 6, 2012 at 1:29 PM, Lars Ekman G <lar...@er...> wrote:
> Hello,
>
> examples/lttng > /lib/libc.so.6
> GNU C Library stable release version 2.11.1 (20100118), by Roland McGrath et al.
> Copyright (C) 2009 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions.
> There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
> PARTICULAR PURPOSE.
> Configured for i686-suse-linux.
> Compiled by GNU CC version 4.3.4 [gcc-4_3-branch revision 152973].
> Compiled on a Linux 2.6.32 system on 2010-10-25.
> Available extensions:
>        crypt add-on version 2.1 by Michael Glad and others
>        GNU Libidn by Simon Josefsson
>        NoVersion patch for broken glibc 2.0 binaries
>        Native POSIX Threads Library by Ulrich Drepper et al
>        BIND-8.2.3-T5B
>
> On a SLED 11 SP1 host (company WS, hence the ancient version)
>

Okay, I have an idea what's going on.
I'll send a patch ASAP.

-- 
Thanks,
//richard

Re: [uml-user] sysconf(_SC_NPROCESSORS_CONF) returns incorrect on UML (0)

[Lars E. G <lar...@er...>]

Hello,

examples/lttng > /lib/libc.so.6
GNU C Library stable release version 2.11.1 (20100118), by Roland McGrath et al.
Copyright (C) 2009 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Configured for i686-suse-linux.
Compiled by GNU CC version 4.3.4 [gcc-4_3-branch revision 152973].
Compiled on a Linux 2.6.32 system on 2010-10-25.
Available extensions:
        crypt add-on version 2.1 by Michael Glad and others
        GNU Libidn by Simon Josefsson
        NoVersion patch for broken glibc 2.0 binaries
        Native POSIX Threads Library by Ulrich Drepper et al
        BIND-8.2.3-T5B

On a SLED 11 SP1 host (company WS, hence the ancient version)

An "strace" shows;

> strace numcpu
 (...stuff removed)
open("/sys/devices/system/cpu", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_CLOEXEC) = 3
fcntl64(3, F_GETFD)                     = 0x1 (flags FD_CLOEXEC)
brk(0)                                  = 0x804b000
brk(0x8074000)                          = 0x8074000
getdents64(3, /* 7 entries */, 32768)   = 208
getdents64(3, /* 0 entries */, 32768)   = 0
brk(0x806c000)                          = 0x806c000
close(3)                                = 0
fstat64(1, {st_mode=S_IFCHR|0660, st_rdev=makedev(4, 0), ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x4018f000
write(1, "_SC_NPROCESSORS_CONF = 0\n", 25_SC_NPROCESSORS_CONF = 0
) = 25
open("/proc/stat", O_RDONLY|O_CLOEXEC)  = 3
read(3, "cpu  6 0 6 1228 0 0 0 0 0 0\ncpu0"..., 8192) = 210
close(3)                                = 0
write(1, "_SC_NPROCESSORS_ONLN = 1\n", 25_SC_NPROCESSORS_ONLN = 1
) = 25
exit_group(0)                           = ?


Regards,
L Ekman


-----Original Message-----
From: richard -rw- weinberger [mailto:ric...@gm...] 
Sent: den 6 juni 2012 13:18
To: Lars Ekman G
Cc: use...@li...
Subject: Re: [uml-user] sysconf(_SC_NPROCESSORS_CONF) returns incorrect on UML (0)

On Wed, Jun 6, 2012 at 12:56 PM, Lars Ekman G <lar...@er...> wrote:
> I am using UML-kernel; 3.0.26
>
> Anyway, this program;
>
> #include <stdio.h>
> #include <unistd.h>
> int main(int argc, char* argv[])
> {
>        printf("_SC_NPROCESSORS_CONF = %d\n", 
> sysconf(_SC_NPROCESSORS_CONF));
>        printf("_SC_NPROCESSORS_ONLN = %d\n", 
> sysconf(_SC_NPROCESSORS_ONLN));
>        return 0;
> }
>
> prints;
>
> _SC_NPROCESSORS_CONF = 0
> _SC_NPROCESSORS_ONLN = 1
>
> I found this when using http://lttng.org/ust on UML.
> It "almost worked". In fact everything except "lttng start"
> seems to work. I patched LTTng to fix the problem.
>
> The problem took a few hours to find so I post this just in case.

Thanks a lot for reporting this!
What glibc-version are you using?

--
Thanks,
//richard

Re: [uml-user] sysconf(_SC_NPROCESSORS_CONF) returns incorrect on UML (0)

[richard -r. w. <ric...@gm...>]

On Wed, Jun 6, 2012 at 12:56 PM, Lars Ekman G <lar...@er...> wrote:
> I am using UML-kernel; 3.0.26
>
> Anyway, this program;
>
> #include <stdio.h>
> #include <unistd.h>
> int main(int argc, char* argv[])
> {
>        printf("_SC_NPROCESSORS_CONF = %d\n", sysconf(_SC_NPROCESSORS_CONF));
>        printf("_SC_NPROCESSORS_ONLN = %d\n", sysconf(_SC_NPROCESSORS_ONLN));
>        return 0;
> }
>
> prints;
>
> _SC_NPROCESSORS_CONF = 0
> _SC_NPROCESSORS_ONLN = 1
>
> I found this when using http://lttng.org/ust on UML.
> It "almost worked". In fact everything except "lttng start"
> seems to work. I patched LTTng to fix the problem.
>
> The problem took a few hours to find so I post this
> just in case.

Thanks a lot for reporting this!
What glibc-version are you using?

-- 
Thanks,
//richard

[uml-user] sysconf(_SC_NPROCESSORS_CONF) returns incorrect on UML (0)

[Lars E. G <lar...@er...>]

Hello,

This may be caused by a bad configuration, or it may have been
corrected already. In that case I apologize.

I am using UML-kernel; 3.0.26

Anyway, this program;

#include <stdio.h>
#include <unistd.h>
int main(int argc, char* argv[])
{
	printf("_SC_NPROCESSORS_CONF = %d\n", sysconf(_SC_NPROCESSORS_CONF));
	printf("_SC_NPROCESSORS_ONLN = %d\n", sysconf(_SC_NPROCESSORS_ONLN));
	return 0;
}

prints;

_SC_NPROCESSORS_CONF = 0
_SC_NPROCESSORS_ONLN = 1

I found this when using http://lttng.org/ust on UML.
It "almost worked". In fact everything except "lttng start"
seems to work. I patched LTTng to fix the problem.

The problem took a few hours to find so I post this
just in case.


Best Regards,
Lars Ekman

Re: [uml-user] linux-v3.5-rc1: start of a user mode linux produces a core file

[Toralf F. <tor...@gm...>]

On 06/03/2012 11:41 AM, richard -rw- weinberger wrote:
> Al and I currently working on -rc1.
> There are TTY and signal issues.
> 
> Stay tuned.
> 
Yep - there's something wired. The current git version cannot be started
in background, meaning that something like
$>./linux ... con=pts con0=fd:0,fd:1 con1=pts con12=pts ... &

creates 3 processes called "linux" - and the output doesn't continue after :

...
NET: Registered protocol family 17
Key type dns_resolver registered
initlevel:7=late, 21 registered initcalls
Initialized stdio console driver




-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3