After spending quite a while trying to explain how things like /bin/echo
could possibly segfault, I finally discovered that the new feature in
xenomai 2.6.0 (new when moving from 2.4.10 that is) of having preemptible
context switches is what is corrupting the state of random linux processes
once
On 12/23/2011 06:33 PM, Lennart Sorensen wrote:
After spending quite a while trying to explain how things like /bin/echo
could possibly segfault, I finally discovered that the new feature in
xenomai 2.6.0 (new when moving from 2.4.10 that is) of having preemptible
context switches is what is
On Fri, Dec 23, 2011 at 07:17:09PM +0100, Philippe Gerum wrote:
Papering over a bug this way is certainly not an option.
Long term it certainly isn't.
Which kernel version, what ppc hardware?
3.0.13, 3.0.9, 3.0.8. mpc8360e.
xenomai 2.6.0 with ipipe 3.0.8-powerpc-2.13-04
--
Len Sorensen
On 12/23/2011 07:32 PM, Lennart Sorensen wrote:
On Fri, Dec 23, 2011 at 07:17:09PM +0100, Philippe Gerum wrote:
Papering over a bug this way is certainly not an option.
Long term it certainly isn't.
Which kernel version, what ppc hardware?
3.0.13, 3.0.9, 3.0.8. mpc8360e.
xenomai 2.6.0
On Fri, Dec 23, 2011 at 09:08:11PM +0100, Philippe Gerum wrote:
Do you have a typical test scenario which triggers this bug?
It can take a couple of hours under pretty heavy load to get one
occourance. But with preemptible context swiches off we haven't seen
any in a week.
For sure xenomai
On 12/23/2011 09:25 PM, Lennart Sorensen wrote:
On Fri, Dec 23, 2011 at 09:08:11PM +0100, Philippe Gerum wrote:
Do you have a typical test scenario which triggers this bug?
It can take a couple of hours under pretty heavy load to get one
occourance. But with preemptible context swiches off
On Fri, Dec 23, 2011 at 10:48:29PM +0100, Philippe Gerum wrote:
Is it reproducible with the basic latency or cyclic tests if waiting
for long enough? Running ltp in parallel would trigger a decent
load, but sometimes two shell loops forking commands in the
background are enough to trigger a
On 12/23/2011 10:55 PM, Lennart Sorensen wrote:
On Fri, Dec 23, 2011 at 10:48:29PM +0100, Philippe Gerum wrote:
Is it reproducible with the basic latency or cyclic tests if waiting
for long enough? Running ltp in parallel would trigger a decent
load, but sometimes two shell loops forking
