From: Blaisorblade <blaisorblade@yahoo.it>
To: user-mode-linux-devel@lists.sourceforge.net
Cc: Michael Richardson <mcr@sandelman.ottawa.on.ca>
Subject: Re: [uml-devel] Xen 3.0.2 and UML guest
Date: Sat, 21 Oct 2006 02:38:16 +0200 [thread overview]
Message-ID: <200610210238.16557.blaisorblade@yahoo.it> (raw)
In-Reply-To: <v0vemg6jbo.fsf@marajade.sandelman.ca>
On Friday 20 October 2006 00:18, Michael Richardson wrote:
> >>>>> "Michael" == Michael Richardson <mcr@sandelman.ottawa.on.ca> writes:
>
> Michael> The fault may well be Xen's. I'm looking for other
> experiences, Michael> yeah or nay.
>
> I built a tree on my laptop as I normally do. It runs etch, and as does my
> debian XenU. With 2.6.15 UML guest on my laptop, everything is fine.
>
> Same binary running under a XenU, goes into R state under XenU:
I forget - XenU is an unprivileged guest, and Xen0 is the main one IIRC
(vaguely) - if that is an unprivileged guest have you tried on the root one?
> 5749 pts/1 Ss+ 0:00 /bin/sh
> /0i/sandboxes/UMLPOOL/260ocf/umlbuild/east/st 5750 pts/1 R+ 2:33
> /0i/sandboxes/UMLPOOL/260ocf/umlbuild/swan26/linux in 5756 pts/1 S+
> 0:00 /0i/sandboxes/UMLPOOL/260ocf/umlbuild/swan26/linux in 5757 pts/1 S+
> 0:00 /0i/sandboxes/UMLPOOL/260ocf/umlbuild/swan26/linux in 5758 pts/1
> S+ 0:00 /0i/sandboxes/UMLPOOL/260ocf/umlbuild/swan26/linux in 5759
> pts/1 T+ 1:19 [linux]
>
> It looks like this happens as soon as the scheduler is enabled.
> mode=tt WORKS.
>
> Running uml_mconsole east sysrq t:
>
> Checking that ptrace can change system call numbers...OK
> Checking syscall emulation patch for ptrace...OK
> Checking advanced syscall emulation patch for ptrace...OK
> Checking PROT_EXEC mmap in /tmp...OK
> Checking for the skas3 patch in the host:
> - /proc/mm...not found
> - PTRACE_FAULTINFO...not found
> - PTRACE_LDT...not found
> UML running in SKAS0 mode
>
> <BIG PAUSE ******>
>
> Linux version 2.6.15 (mcr@marajade.sandelman.ca) (gcc version 4.1.2
> 20060901 (pr erelease) (Debian 4.1.1-13)) #2 Thu Oct
> 19 17:29:21 EDT 2006 Built 1 zonelists
A strace -t (or whichever option shows the timings) would help finding _where_
is the big pause...
--
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade
http://www.user-mode-linux.org/~blaisorblade
Chiacchiera con i tuoi amici in tempo reale!
http://it.yahoo.com/mail_it/foot/*http://it.messenger.yahoo.com
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next prev parent reply other threads:[~2006-10-21 1:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-19 17:03 [uml-devel] Xen 3.0.2 and UML guest Michael Richardson
2006-10-19 22:18 ` Michael Richardson
2006-10-21 0:38 ` Blaisorblade [this message]
2006-10-21 1:39 ` Michael Richardson
2006-10-21 2:54 ` Blaisorblade
2006-10-23 20:40 ` Michael Richardson
2006-10-23 20:49 ` Jyrki Jaakkola
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