RE: [Xen-devel] modify_ldt errors on x86_64

["Nakajima, Jun" <jun.nakajima@xxxxxxxxx>]

Karl Rister wrote:
> On Saturday 12 November 2005 7:06 am, Ian Pratt wrote:
>>> I am trying to run some Java tests in a dom0 running on
>>> x86_64 and I am receiving the following error message:
>>> 
>>> setupLdt: modify_ldt: Invalid argument
>>> 
>>> After 2 of these the JVM just hangs and I have to kill it.
>>> This does not happen when booting the systerm without Xen.  I
>>> have tried several different changesets from the past few
>>> days and have seen the same thing on all of them.  My current
>>> changeset is 7746.  Has anyone else seen this?
>> 
>> No, this is the first report.
>> 
>> Which version of Java are you using. Have you a simple test case?
> 
> "java -version" returns the following on baremetal Linux, this simple
> test is enough to cause the problem in domain0
> 
> java version "1.4.2"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2)
> Classic VM (build 1.4.2, J2RE 1.4.2 IBM build cxia32142sr1a-20050209
> (JIT enabled: jitc))

I tested "java -version" on x86_64 xenlinux, and got:

java version "1.4.2-02"
Java(TM) 2 Runtime Environment, Standard Edition (build
Blackdown-1.4.2-02)
Java HotSpot(TM) 64-Bit Server VM (build Blackdown-1.4.2-02, mixed mode)

I downloaded it from ftp.tux.org. 

> 
> An strace on the java process shows these two messages being dumped
> over and over again in a loop:
> 
> rt_sigprocmask(SIG_UNBLOCK, [ILL TRAP BUS FPE SEGV], ~[KILL USR2 STOP
> RTMIN RT_1], 8) = 0
> --- SIGSEGV (Segmentation fault) @ 0 (0) ---


Jun
---
Intel Open Source Technology Center

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