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Message-ID: <20190214122638.GD26714@krava> Date: Thu, 14 Feb 2019 13:26:38 +0100 From: Jiri Olsa <jolsa@...hat.com> To: Song Liu <songliubraving@...com> Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, ast@...nel.org, daniel@...earbox.net, kernel-team@...com, peterz@...radead.org, acme@...hat.com Subject: Re: [PATCH 5/9] perf, bpf: save bpf_prog_info in a rbtree in perf_env On Fri, Feb 08, 2019 at 05:17:01PM -0800, Song Liu wrote: SNIP > diff --git a/tools/perf/util/env.h b/tools/perf/util/env.h > index d01b8355f4ca..5894a177b7cf 100644 > --- a/tools/perf/util/env.h > +++ b/tools/perf/util/env.h > @@ -3,7 +3,10 @@ > #define __PERF_ENV_H > > #include <linux/types.h> > +#include <linux/rbtree.h> > #include "cpumap.h" > +#include "rwsem.h" > +#include "bpf-event.h" > > struct cpu_topology_map { > int socket_id; > @@ -64,6 +67,8 @@ struct perf_env { > struct memory_node *memory_nodes; > unsigned long long memory_bsize; > u64 clockid_res_ns; > + struct rw_semaphore bpf_info_lock; why's the lock needed? jirka
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