linux-kernel - Re: [PATCH 0/6] tracing/ring-buffer: Fix wakeup of ring buffer waiters

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Message-ID: <CAHk-=whWbhhNLCZgb97PP9Bo-XbNNMdPxqr0YRjYWXP5E3a1ug@mail.gmail.com>
Date: Fri, 8 Mar 2024 13:41:59 -0800
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org, 
	Masami Hiramatsu <mhiramat@...nel.org>, Mark Rutland <mark.rutland@....com>, 
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, Andrew Morton <akpm@...ux-foundation.org>, 
	joel@...lfernandes.org, linke li <lilinke99@...com>, Rabin Vincent <rabin@....in>
Subject: Re: [PATCH 0/6] tracing/ring-buffer: Fix wakeup of ring buffer waiters

On Fri, 8 Mar 2024 at 13:39, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> So the above "complexity" is *literally* just changing the
>
>                   (new = atomic_read_acquire(&my->seq)) != old
>
> condition to
>
>                   should_exit ||
>                   (new = atomic_read_acquire(&my->seq)) != old

. and obviously you'll need to add the exit condition to the actual
"deal with events" loop too.

                Linus