From: Peter Zijlstra <peterz@infradead.org>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
andrii@kernel.org, Martin KaFai Lau <kafai@fb.com>,
David Miller <davem@davemloft.net>,
kpsingh@kernel.org, John Fastabend <john.fastabend@gmail.com>,
netdev <netdev@vger.kernel.org>, bpf <bpf@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: extended bpf_send_signal_thread with argument
Date: Mon, 1 Feb 2021 10:22:27 +0100 [thread overview]
Message-ID: <YBfIUwtK+QqVlfRt@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <CACT4Y+a7UBQpAY4vwT8Od0JhwbwcDrbJXZ_ULpPfJZ42Ew-yCQ@mail.gmail.com>
On Sun, Jan 31, 2021 at 12:14:02PM +0100, Dmitry Vyukov wrote:
> Hi,
>
> I would like to send a signal from a bpf program invoked from a
> perf_event. There is:
You can't. Sending signals requires sighand lock, and you're not allowed
to take locks from perf_event context.
next parent reply other threads:[~2021-02-01 9:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CACT4Y+a7UBQpAY4vwT8Od0JhwbwcDrbJXZ_ULpPfJZ42Ew-yCQ@mail.gmail.com>
2021-02-01 9:22 ` Peter Zijlstra [this message]
2021-02-01 9:42 ` Dmitry Vyukov
2021-02-01 13:33 ` Peter Zijlstra
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