On 11/28, Oleg Nesterov wrote:
>
> On 11/27, Oleg Nesterov wrote:
> >
> > So I think the patch below makes sense anyway. Although I should probably
> > split it and remove PT_TRACE_EXIT in 2/2.
>
> So let me send the patches.
>
> David, Michal, could you review and ack/nack these changes explicitly?
>
> Let me repeat once again that this patch doesn't pretend to solve
> all problems, even with the coredumping. And I have to admit that
> my main motivation is 2/2, this PT_TRACE_EXIT check annoys me ;)
Another simple test. cat mtsleep.c:
#include <unistd.h>
#include <pthread.h>
void *tfunc(void *arg)
{
pause();
return NULL;
}
int main(void)
{
pthread_t th;
pthread_create(&th, NULL, tfunc, NULL);
pause();
return 0;
}
Now,
# echo '|/bin/sleep 1000' >> /proc/sys/kernel/core_pattern
# echo 10 >> /proc/sys/kernel/core_pipe_limit
# ./mtsleep &
# kill -QUIT %1
# perl -e 'push @_,"x" x 1000_1000 while 1'
Before this series the system hangs and doesn't respond. With these
patches it correctly kills perl.
Oleg.
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