linux-kernel - Re: [PATCH v5 00/21] kprobes: Unify kretprobe trampoline handlers and make kretprobe lockless

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Message-ID: <87eendo51o.fsf@redhat.com>
Date:   Mon, 07 Sep 2020 13:44:19 -0400
From:   fche@...hat.com (Frank Ch. Eigler)
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     peterz@...radead.org, Ingo Molnar <mingo@...nel.org>,
        linux-kernel@...r.kernel.org, Eddy_Wu@...ndmicro.com,
        x86@...nel.org, davem@...emloft.net, rostedt@...dmis.org,
        naveen.n.rao@...ux.ibm.com, anil.s.keshavamurthy@...el.com,
        linux-arch@...r.kernel.org, cameron@...dycamel.com,
        oleg@...hat.com, will@...nel.org, paulmck@...nel.org,
        systemtap@...rceware.org
Subject: Re: [PATCH v5 00/21] kprobes: Unify kretprobe trampoline handlers and make kretprobe lockless

Masami Hiramatsu <mhiramat@...nel.org> writes:

> Sorry, for noticing this point, I Cc'd to systemtap. Is systemtap taking
> care of spinlock too?

On PRREMPT_RT configurations, systemtap uses the raw_spinlock_t
types/functions, to keep its probe handlers as atomic as we can make them.

- FChE