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From:   Andy Lutomirski <luto@amacapital.net>
Mime-Version: 1.0 (1.0)
Subject: Re: Why do kprobes and uprobes singlestep?
Date:   Tue, 2 Mar 2021 13:02:57 -0800
Message-Id: <EECBE373-7CA1-4ED8-9F03-406BBED607FD@amacapital.net>
References: <CAADnVQ+czV6u4CM-A+o5U+WhApkocunZXiCMJBB_Zbs0mvNSwQ@mail.gmail.com>
Cc:     Andy Lutomirski <luto@kernel.org>, bpf <bpf@vger.kernel.org>,
        Oleg Nesterov <oleg@redhat.com>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>,
        "David S. Miller" <davem@davemloft.net>, X86 ML <x86@kernel.org>,
        Andrew Cooper <andrew.cooper3@citrix.com>
In-Reply-To: <CAADnVQ+czV6u4CM-A+o5U+WhApkocunZXiCMJBB_Zbs0mvNSwQ@mail.gmail.com>
To:     Alexei Starovoitov <alexei.starovoitov@gmail.com>
Precedence: bulk


> On Mar 2, 2021, at 12:24 PM, Alexei Starovoitov <alexei.starovoitov@gmail.=
com> wrote:
>=20
> =EF=BB=BFOn Tue, Mar 2, 2021 at 10:38 AM Andy Lutomirski <luto@kernel.org>=
 wrote:
>>=20
>> Is there something like a uprobe test suite?  How maintained /
>> actively used is uprobe?
>=20
> uprobe+bpf is heavily used in production.
> selftests/bpf has only one test for it though.
>=20
> Why are you asking?

Because the integration with the x86 entry code is a mess, and I want to kno=
w whether to mark it BROKEN or how to make sure the any cleanups actually wo=
rk.=