From: Steven Rostedt <rostedt@goodmis.org>
To: Vineet Gupta <vineet.gupta@linux.dev>
Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com>,
mhiramat@kernel.org, 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, stable@vger.kernel.org
Subject: Re: [PATCH v4 1/2] tracing: fgraph: allocate shadow stacks inline with GFP_NOWAIT
Date: Fri, 23 Oct 2026 18:09:02 -0400 [thread overview]
Message-ID: <20261023180902.2bf7cef4@gandalf.local.home> (raw)
In-Reply-To: <75b66acc-354e-4cd2-b9cb-4c22e8a02635@linux.dev>
On Fri, 23 Oct 2026 13:13:41 -0700
Vineet Gupta <vineet.gupta@linux.dev> wrote:
> On 10/23/26 11:38 AM, Steven Rostedt wrote:
> > On Fri, 23 Oct 2026 11:13:44 -0700
> > Andrii Nakryiko <andrii.nakryiko@gmail.com> wrote:
> >
> >> Acked-by: Andrii Nakryiko <andrii@kernel.org>
> >>
> >> I presume this will go through Masami and Steven's tree, is that right?
> > Yes, but it came in during the merge window, and since it's just a speed up
> > and not fixing something that's broken, I was going to let this go in the
> > next merge window. I rather have a change like this sit through a full -rc
> > release.
>
> It is a speed up but not for optimization sake but to cure rcu stalls in
> production at Meta. IMHO it should go in sooner than wait a full release
> cycle.
>
Either way, I'd like to give it a bit more testing first. That is, the
earliest it will go is after -rc1.
-- Steve
next prev parent reply other threads:[~2026-10-23 22:09 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-21 17:44 [PATCH v4 0/2] tracing: fgraph: fix the quadratic shadow stack walk Vineet Gupta
2026-10-21 17:44 ` [PATCH v4 1/2] tracing: fgraph: allocate shadow stacks inline with GFP_NOWAIT Vineet Gupta
2026-10-23 18:13 ` Andrii Nakryiko
2026-10-23 18:38 ` Steven Rostedt
2026-10-23 20:13 ` Vineet Gupta
2026-10-23 22:09 ` Steven Rostedt [this message]
2026-10-23 22:25 ` 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 ` [PATCH v4 0/2] tracing: fgraph: fix the quadratic shadow stack walk Alexei Starovoitov
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