Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-ti-omap4 (Ubuntu)
Status: New => Confirmed
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Title
I have moved the #16 discussion of a potential deadlock in the #10 patch
into the https://bugs.launchpad.net/ubuntu/+source/linux-ti-
omap4/+bug/951043 bugreport that deals with the merge of #10 into
precise.
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hum.. ignore my comment in #16 it is irrelevant..
the goto retry logic got added with the patch in #10
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Title:
Frequent java task hang on ARM ser
please re-test using https://launchpad.net/ubuntu/+source/linux-ti-
omap4/3.2.0-1409.12
I belive this bug have been fixed when using the precise 3.2 kernels that
contain a reworked arch/arm/mm/fault.c
where this part in do_page_fault:
* As per x86, we may deadlock here. However, since
** Tags added: arm-porting-queue
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Title:
Frequent java task hang on ARM server
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I can reproduce this bug using the openjdk6 + linux-ti-omap4 kernel
using the Linaro 12.02 release.
** Also affects: linux-ti-omap4 (Ubuntu Linaro Evaluation Build)
Importance: Undecided
Status: New
** Also affects: linux-ti-omap4 (Ubuntu)
Importance: Undecided
Status: New
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The Jogamp team have found that this bug triggers more frequently while testing
against the ubuntu-omap4-extras libEGL compared to using the mesa software
packages.
http://forum.jogamp.org/Linux-ARM-freezes-Java-EGL-ES-JOGL-td3801301.html
"However platform-1b does not freeze (software OpenGL)
he
** Also affects: ubuntu-omap4-extras-graphics
Importance: Undecided
Status: New
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Title:
Frequent java task hang on ARM server
To manage
The patch
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=7178/1 in
#10 enables the user to kill the stuck process when this bug triggers
but it do not fix the deadlock itself.
Testcase that can reproduce this lock bug using a pandaboard running
kernel 3.1 using Ubuntu oneiric with
The best way to track this kernel lock bug are probably to recompile a
kernel with lockdep enabled.
(11:40:44) xranby: mjw: can systemtap help diagnose kernel locks? i would like
to know what part of the kernel are holding a &mm->mmap_sem semaphore
(11:42:20) xranby: all i currently know are all
The reason why this bug happens are that some process, currently unknown
to us which one, have locked and keeps on holding the kernel
&mm->mmap_sem lock without releasing it.
When java hits a pagefault then the Linux kernel needs to aquire this
lock in order to serve the pagefault, it waits, and
This are possibly caused by a arm linux kernel pagefault stall
Do this patch improve the situation?
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=7178/1
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: openjdk-6 (Ubuntu)
Status: New => Confirmed
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Title:
F
I am able to trigger a similar looking bug (java process entered
uninterruptible sleep) while running NetBeans.
Steps to reproduce:
#go to netbeans download page
http://netbeans.org/downloads/start.html?platform=zip&lang=en&option=javase
wget
http://download.netbeans.org/netbeans/7.0.1/final/zip
On Mon, 2011-09-12 at 21:23 +, Tobin Davis wrote:
> Can you also comment on what part of jenkins you see this with? I
> have
> the jenkins slave running on my systems with the same jvm package and
> have had no problems.
>
> Give a list of jenkins packages or a link to the jenkins release th
Can you also comment on what part of jenkins you see this with? I have
the jenkins slave running on my systems with the same jvm package and
have had no problems.
Give a list of jenkins packages or a link to the jenkins release that
you ran and details on installation for reproduction. Thanks.
** Tags added: jamvm
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Title:
Frequent java task hang on ARM server
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I see a similar issue with jetty:
Sep 12 11:18:43 winehouse kernel: [ 602.998992] INFO: task jsvc:693 blocked
for more than 120 seconds.
Sep 12 11:18:43 winehouse kernel: [ 602.999176] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Sep 12 11:18:43 winehouse kernel:
Hi Xerxes
I've attached more information to the main description of the bug which
should cover kernel version.
I'm using an OMAP4 Pandaboard - not sure how I check hardware revision
TBH.
I've not got a chroot environment setup for ARM so can't test the natty
kernel stuff (yet).
With reference t
Hi James, are you able to reproduce this bug from inside a oneiric
chroot while running a Natty kernel?
Do Jenkins need to run any specific task to trigger the bug?
Which ARM hardware + hardware revision and kernel version are you
using?
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I see if I can grab a stack trace from the java process but unlikely as
system is frozen
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Title:
Frequent java task hang on ARM server
To manage
** Attachment added: "arm-java-errors.txt"
https://bugs.launchpad.net/ubuntu/+bug/845158/+attachment/2374081/+files/arm-java-errors.txt
** Package changed: ubuntu => openjdk-6 (Ubuntu)
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