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/memregion.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 lib/memregion.c (limited to 'lib/memregion.c') diff --git a/lib/memregion.c b/lib/memregion.c new file mode 100644 index 000000000..be5cfa5a3 --- /dev/null +++ b/lib/memregion.c @@ -0,0 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* identifiers for device / performance-differentiated memory regions */ +#include +#include +#include + +static DEFINE_IDA(memregion_ids); + +int memregion_alloc(gfp_t gfp) +{ + return ida_alloc(&memregion_ids, gfp); +} +EXPORT_SYMBOL(memregion_alloc); + +void memregion_free(int id) +{ + ida_free(&memregion_ids, id); +} +EXPORT_SYMBOL(memregion_free); -- cgit v1.3.1