From: "Alexei Starovoitov" <alexei.starovoitov@gmail.com>
To: "Vineet Gupta" <vineet.gupta@linux.dev>, <rostedt@goodmis.org>,
<mhiramat@kernel.org>
Cc: <mark.rutland@arm.com>, <mathieu.desnoyers@efficios.com>,
<andrii@kernel.org>, <peterz@infradead.org>,
<linux-trace-kernel@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <bpf@vger.kernel.org>,
<kernel-team@meta.com>
Subject: Re: [PATCH v4 0/2] tracing: fgraph: fix the quadratic shadow stack walk
Date: Wed, 21 Oct 2026 22:01:10 +0000 [thread overview]
Message-ID: <DMAUS3F32198.M27YWDF2F3UV@gmail.com> (raw)
In-Reply-To: <20261021174406.2891598-1-vineet.gupta@linux.dev>
On Wed, Oct 21, 2026 at 10:44 AM Vineet Gupta <vineet.gupta@linux.dev> wrote:
> On a 60-core Sapphire Rapids machine with 400000 idle threads it took
> 227 s, inside a single bpf() syscall for the kprobe_multi case.
Acked-by: Alexei Starovoitov <ast@kernel.org>
prev parent reply other threads:[~2026-10-21 22:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-21 17:44 Vineet Gupta
2026-10-21 17:44 ` [PATCH v4 1/2] tracing: fgraph: allocate shadow stacks inline with GFP_NOWAIT Vineet Gupta
2026-10-21 17:44 ` [PATCH v4 2/2] tracing: fgraph: use scoped_guard() for the task list walk Vineet Gupta
2026-10-21 22:01 ` Alexei Starovoitov [this message]
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