Geir Magnusson Jr. wrote:
I'm confused. Didn't you just report this on Ubuntu?
Let Leo speak for himself, but I thought Leo meant IBM VME + Harmony
classlib failed on Ubuntu and Redhat, but Alexey just reported that both
(VME and DRLVM) works on SUSE, that's why it seems interesting.
I have had similar forking problems on Ubuntu 6 (I once found a bug in
classlib related to forking...).
I never figured out why Unbuntu does this, but it seemed that under
memory stress, Ubuntu's fork() fails. Try this - close Eclipse and
run the test again...
geir
Leo Li wrote:
Thank you.
I have just run it on drlvm of unbuntu, it works.
What a qurious problem!
On 10/16/06, Alexey Varlamov <[EMAIL PROTECTED]> wrote:
Both DRLVM and J9 works for me (SUSE9).
--
Alexey
2006/10/16, Leo Li <[EMAIL PROTECTED]>:
> Hi, all:
> The harmony Runtime.exec fails on Linux with ENOMEM.
> Here is the testcase:
>
> public class Exec {
> public static void main(String[] args) throws Exception {
>
> Runtime.getRuntime().exec("ls"); }
> }
>
> I have tried it on RedHat Enterprise 4 and Unbuntu, both get
ENOMEM
in
> native code.
>
> After digging into it, I found it fails in procimpl.c, line 135:
>
> grdpid = fork ();
>
> If the call to fork is changed to vfork, the testcase will pass
but
> still get exitcode = 1 which indicates that some error has
happened. The
> difference between fork and vfork is just whether page tables is
copied
to
> child process or not. But I do not think it is the main cause.
Besides,
> vfork has become outdated since it main usage is supplied by fork
with
> copy-on-write function implemented in modern linux kernel.
Furthermore,
> vfork is also not so safe as fork. So I do not think it is the
accepted
way
> to solve the problem.
>
> I will try whether it can be reproduced on drlvm of linux since
I am
not
> sure whether it is relevent to VM or classlib. If any drlvm man
can tell
me
> the result, it can avoid my trouble to build it on linux. :)
>
>
>
>
>
>
>
> --
> Leo Li
> China Software Development Lab, IBM
>
>
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Paulex Yang
China Software Development Lab
IBM
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