The linux-next integration testing tree https://git.rulkc.org/pub/scm/linux/kernel/git/next/linux-next.git/atom?h=master 2026-08-24T00:01:46+00:00 2026-08-24T00:01:46+00:00 Breno Leitao leitao@debian.org 2026-08-10T11:29:26+00:00 urn:sha1:915312ce14447560e21258be05d44fb7d6e84a4f Add test_csd_lock, a module that keeps one CPU from answering an IPI for as long as its stall_ms parameter says, so that the CSD-lock debug code has a stall to report. With in_handler=1 the CPU stalls inside a CSD handler instead, which is the case where the IPI is not re-sent. The module needs CONFIG_CSD_LOCK_WAIT_DEBUG and csdlock_debug=1. Loading it runs one stall and then fails the load with -EAGAIN, the way test_lockup does, so that nothing is left loaded afterwards. Signed-off-by: Breno Leitao <leitao@debian.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>