From aeb709c767aeca996e6011133e4f7bdb2a4af652 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Wed, 30 Sep 2026 09:59:20 +0000 Subject: selftests/bpf: Add a test for objects stuck in free_by_rcu_ttrace Delete all elements of BPF_F_NO_PREALLOC hash map in one batch. The first free_bulk() starts RCU tasks trace GP and the rest of the elements are freed while it's in flight. Wait for call_rcu_ttrace_in_progress to clear in bpf_mem_cache of every cpu and check that free_by_rcu_ttrace and waiting_for_gp_ttrace lists are empty. Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20260930095920.601738-4-alexei.starovoitov@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- lib/bust_spinlocks.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 lib/bust_spinlocks.c (limited to 'lib/bust_spinlocks.c') diff --git a/lib/bust_spinlocks.c b/lib/bust_spinlocks.c new file mode 100644 index 000000000..bfd53972a --- /dev/null +++ b/lib/bust_spinlocks.c @@ -0,0 +1,29 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * lib/bust_spinlocks.c + * + * Provides a minimal bust_spinlocks for architectures which don't + * have one of their own. + * + * bust_spinlocks() clears any spinlocks which would prevent oops, die(), BUG() + * and panic() information from reaching the user. + */ + +#include +#include +#include +#include +#include +#include +#include + +void bust_spinlocks(int yes) +{ + if (yes) { + ++oops_in_progress; + } else { + console_unblank(); + if (--oops_in_progress == 0) + wake_up_klogd(); + } +} -- cgit v1.3.1