From a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656 Mon Sep 17 00:00:00 2001 From: Breno Leitao Date: Wed, 5 Aug 2026 07:52:36 -0700 Subject: workqueue: skip the node_nr_active update for non-unbound workqueues apply_wqattrs_commit() updates node_nr_active->max unconditionally. wq->node_nr_active[] is only allocated for unbound workqueues, so guard the call before per-cpu workqueues start using this path. No functional change: only unbound workqueues reach apply_wqattrs_*() today. Signed-off-by: Breno Leitao Signed-off-by: Tejun Heo --- tools/perf/util/namespaces.h | 84 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 tools/perf/util/namespaces.h (limited to 'tools/perf/util/namespaces.h') diff --git a/tools/perf/util/namespaces.h b/tools/perf/util/namespaces.h new file mode 100644 index 000000000..e95c79b80 --- /dev/null +++ b/tools/perf/util/namespaces.h @@ -0,0 +1,84 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * + * Copyright (C) 2017 Hari Bathini, IBM Corporation + */ + +#ifndef __PERF_NAMESPACES_H +#define __PERF_NAMESPACES_H + +#include +#include +#include +#include +#include +#include +#include + +#ifndef HAVE_SETNS_SUPPORT +int setns(int fd, int nstype); +#endif + +struct perf_record_namespaces; + +struct namespaces { + struct list_head list; + u64 end_time; + struct perf_ns_link_info link_info[]; +}; + +struct namespaces *namespaces__new(struct perf_record_namespaces *event); +void namespaces__free(struct namespaces *namespaces); + +DECLARE_RC_STRUCT(nsinfo) { + pid_t pid; + pid_t tgid; + pid_t nstgid; + bool need_setns; + bool in_pidns; + char *mntns_path; + refcount_t refcnt; +}; + +struct nscookie { + int oldns; + int newns; + char *oldcwd; +}; + +int nsinfo__init(struct nsinfo *nsi); +struct nsinfo *nsinfo__new(pid_t pid); +struct nsinfo *nsinfo__copy(const struct nsinfo *nsi); + +struct nsinfo *nsinfo__get(struct nsinfo *nsi); +void nsinfo__put(struct nsinfo *nsi); + +bool nsinfo__need_setns(const struct nsinfo *nsi); +void nsinfo__clear_need_setns(struct nsinfo *nsi); +pid_t nsinfo__tgid(const struct nsinfo *nsi); +pid_t nsinfo__nstgid(const struct nsinfo *nsi); +pid_t nsinfo__pid(const struct nsinfo *nsi); +bool nsinfo__in_pidns(const struct nsinfo *nsi); +void nsinfo__set_in_pidns(struct nsinfo *nsi); + +void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc); +void nsinfo__mountns_exit(struct nscookie *nc); + +char *nsinfo__realpath(const char *path, struct nsinfo *nsi); +int nsinfo__stat(const char *filename, struct stat *st, struct nsinfo *nsi); + +bool nsinfo__is_in_root_namespace(void); + +static inline void __nsinfo__zput(struct nsinfo **nsip) +{ + if (nsip) { + nsinfo__put(*nsip); + *nsip = NULL; + } +} + +#define nsinfo__zput(nsi) __nsinfo__zput(&nsi) + +const char *perf_ns__name(unsigned int id); + +#endif /* __PERF_NAMESPACES_H */ -- cgit v1.3.1