From: Peter Zijlstra <peterz@infradead.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: ruipengqi <ruipengqi3@gmail.com>,
jaegeuk@kernel.org, chao@kernel.org,
linux-f2fs-devel@lists.sourceforge.net,
linux-kernel@vger.kernel.org, Lance Yang <ioworker0@gmail.com>,
Mingzhe Yang <mingzhe.yang@ly.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
Anna Schumaker <anna.schumaker@oracle.com>,
Boqun Feng <boqun.feng@gmail.com>, Ingo Molnar <mingo@redhat.com>,
Joel Granados <joel.granados@kernel.org>,
John Stultz <jstultz@google.com>,
Kent Overstreet <kent.overstreet@linux.dev>,
Sergey Senozhatsky <senozhatsky@chromium.org>,
Steven Rostedt <rostedt@goodmis.org>,
Tomasz Figa <tfiga@chromium.org>,
Waiman Long <longman@redhat.com>, Will Deacon <will@kernel.org>,
Yongliang Gao <leonylgao@tencent.com>,
Zi Li <amaindex@outlook.com>
Subject: Re: [PATCH 1/2] hung_task: replace blocker_mutex with encoded blocker
Date: Wed, 25 Mar 2026 16:03:36 +0100 [thread overview]
Message-ID: <20260325150336.GF3738786@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <20260325075332.c32528cd5a16bc7886421a1b@linux-foundation.org>
On Wed, Mar 25, 2026 at 07:53:32AM -0700, Andrew Morton wrote:
> On Wed, 25 Mar 2026 14:54:13 +0100 Peter Zijlstra <peterz@infradead.org> wrote:
>
> >
> > I still fully and totally detest all of this :/
>
> This is one of those mystery sends of material which has been upstream
> for nearly a year.
>
> I don't recall you weighing in when this was under discussion - did I
> miss something?
I'm sure I replied at some point, because the original was going to
abuse the blocked_on field, which we need for something else.
> What's the objection?
Death by a thousand cuts and endless duplication of stuff and nobody
should grub at lock internals.
We have a ton of lock debugging stuff, but because $raisins people don't
want to run their misbehaving crap on a debug kernel, so we must put
'cheap' hacks into production kernels :-(
prev parent reply other threads:[~2026-03-25 15:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-25 13:33 [PATCH 1/2] hung_task: replace blocker_mutex with encoded blocker ruipengqi
2026-03-25 13:54 ` Peter Zijlstra
2026-03-25 14:53 ` Andrew Morton
2026-03-25 15:03 ` Peter Zijlstra [this message]
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