On Wed, 20 Sep 2017 16:06:34 -0700 Roman Gushchin <guro@xxxxxx> wrote: > Right now there is no convenient way to check if a process is being > coredumped at the moment. > > It might be necessary to recognize such state to prevent killing > the process and getting a broken coredump. > Writing a large core might take significant time, and the process > is unresponsive during it, so it might be killed by timeout, > if another process is monitoring and killing/restarting > hanging tasks. > > To provide an ability to detect if a process is in the state of > being coreduped, we can expose a boolean CoreDumping flag > in /proc/pid/status. > > Example: > $ cat core.sh > #!/bin/sh > > echo "|/usr/bin/sleep 10" > /proc/sys/kernel/core_pattern > sleep 1000 & > PID=$! > > cat /proc/$PID/status | grep CoreDumping > kill -ABRT $PID > sleep 1 > cat /proc/$PID/status | grep CoreDumping > > $ ./core.sh > CoreDumping: 0 > CoreDumping: 1 I assume you have some real-world use case which benefits from this. > fs/proc/array.c | 6 ++++++ > 1 file changed, 6 insertions(+) A Documentation/ would be appropriate? Include a brief mention of *why* someone might want to use this... -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
