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SubjectRe: [PATCH 0/2] Introduce CABA helper process tree
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CC: kernel@openvz.org

On 10.06.2022 19:32, Pavel Tikhomirov wrote:
> Please see "Add CABA tree to task_struct" for deeper explanation, and
> "tests: Add CABA selftest" for a small test and an actual case for which
> we might need CABA.
>
> Probably the original problem of restoring process tree with complex
> sessions can be resolved by allowing sessions copying, like we do for
> process group, but I'm not sure if that would be too secure to do it,
> and if there would not be another similar resource in future.
>
> We can use CABA not only for CRIU for restoring processes, in normal
> life when processes detach CABA will help to understand from which place
> in process tree they were originally started from sshd/crond or
> something else.
>
> Hope my idea is not completely insane =)
>
> CC: Eric Biederman <ebiederm@xmission.com>
> CC: Kees Cook <keescook@chromium.org>
> CC: Alexander Viro <viro@zeniv.linux.org.uk>
> CC: Ingo Molnar <mingo@redhat.com>
> CC: Peter Zijlstra <peterz@infradead.org>
> CC: Juri Lelli <juri.lelli@redhat.com>
> CC: Vincent Guittot <vincent.guittot@linaro.org>
> CC: Dietmar Eggemann <dietmar.eggemann@arm.com>
> CC: Steven Rostedt <rostedt@goodmis.org>
> CC: Ben Segall <bsegall@google.com>
> CC: Mel Gorman <mgorman@suse.de>
> CC: Daniel Bristot de Oliveira <bristot@redhat.com>
> CC: Valentin Schneider <vschneid@redhat.com>
> CC: Andrew Morton <akpm@linux-foundation.org>
> CC: linux-ia64@vger.kernel.org
> CC: linux-kernel@vger.kernel.org
> CC: linux-mm@kvack.org
> CC: linux-fsdevel@vger.kernel.org
>
> Pavel Tikhomirov (2):
> Add CABA tree to task_struct
> tests: Add CABA selftest
>
> arch/ia64/kernel/mca.c | 3 +
> fs/exec.c | 1 +
> fs/proc/array.c | 18 +
> include/linux/sched.h | 7 +
> init/init_task.c | 3 +
> kernel/exit.c | 50 ++-
> kernel/fork.c | 4 +
> tools/testing/selftests/Makefile | 1 +
> tools/testing/selftests/caba/.gitignore | 1 +
> tools/testing/selftests/caba/Makefile | 7 +
> tools/testing/selftests/caba/caba_test.c | 501 +++++++++++++++++++++++
> tools/testing/selftests/caba/config | 1 +
> 12 files changed, 591 insertions(+), 6 deletions(-)
> create mode 100644 tools/testing/selftests/caba/.gitignore
> create mode 100644 tools/testing/selftests/caba/Makefile
> create mode 100644 tools/testing/selftests/caba/caba_test.c
> create mode 100644 tools/testing/selftests/caba/config
>

--
Best regards, Tikhomirov Pavel
Software Developer, Virtuozzo.

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