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 --- tools/lib/thermal/sampling.c | 77 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 tools/lib/thermal/sampling.c (limited to 'tools/lib/thermal/sampling.c') diff --git a/tools/lib/thermal/sampling.c b/tools/lib/thermal/sampling.c new file mode 100644 index 000000000..f67c1f9ea --- /dev/null +++ b/tools/lib/thermal/sampling.c @@ -0,0 +1,77 @@ +// SPDX-License-Identifier: LGPL-2.1+ +// Copyright (C) 2022, Linaro Ltd - Daniel Lezcano +#include +#include +#include +#include + +#include +#include "thermal_nl.h" + +static int handle_thermal_sample(struct nl_msg *n, void *arg) +{ + struct nlmsghdr *nlh = nlmsg_hdr(n); + struct genlmsghdr *genlhdr = genlmsg_hdr(nlh); + struct nlattr *attrs[THERMAL_GENL_ATTR_MAX + 1]; + struct thermal_handler_param *thp = arg; + struct thermal_handler *th = thp->th; + + arg = thp->arg; + + genlmsg_parse(nlh, 0, attrs, THERMAL_GENL_ATTR_MAX, NULL); + + switch (genlhdr->cmd) { + + case THERMAL_GENL_SAMPLING_TEMP: + return th->ops->sampling.tz_temp( + nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_ID]), + nla_get_u32(attrs[THERMAL_GENL_ATTR_TZ_TEMP]), arg); + default: + return THERMAL_ERROR; + } +} + +thermal_error_t thermal_sampling_handle(struct thermal_handler *th, void *arg) +{ + struct thermal_handler_param thp = { .th = th, .arg = arg }; + + if (!th) + return THERMAL_ERROR; + + if (nl_cb_set(th->cb_sampling, NL_CB_VALID, NL_CB_CUSTOM, + handle_thermal_sample, &thp)) + return THERMAL_ERROR; + + return nl_recvmsgs(th->sk_sampling, th->cb_sampling); +} + +int thermal_sampling_fd(struct thermal_handler *th) +{ + if (!th) + return -1; + + return nl_socket_get_fd(th->sk_sampling); +} + +thermal_error_t thermal_sampling_exit(struct thermal_handler *th) +{ + if (nl_unsubscribe_thermal(th->sk_sampling, th->cb_sampling, + THERMAL_GENL_SAMPLING_GROUP_NAME)) + return THERMAL_ERROR; + + nl_thermal_disconnect(th->sk_sampling, th->cb_sampling); + + return THERMAL_SUCCESS; +} + +thermal_error_t thermal_sampling_init(struct thermal_handler *th) +{ + if (nl_thermal_connect(&th->sk_sampling, &th->cb_sampling)) + return THERMAL_ERROR; + + if (nl_subscribe_thermal(th->sk_sampling, th->cb_sampling, + THERMAL_GENL_SAMPLING_GROUP_NAME)) + return THERMAL_ERROR; + + return THERMAL_SUCCESS; +} -- cgit v1.3.1