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[82.69.66.36]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-46fb4982b30sm230224825e9.6.2025.10.14.03.12.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Oct 2025 03:12:08 -0700 (PDT) Date: Tue, 14 Oct 2025 11:11:25 +0100 From: David Laight To: Geert Uytterhoeven Cc: Andrew Morton , Lance Yang , Eero Tamminen , Kent Overstreet , amaindex@outlook.com, anna.schumaker@oracle.com, boqun.feng@gmail.com, ioworker0@gmail.com, joel.granados@kernel.org, jstultz@google.com, leonylgao@tencent.com, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, longman@redhat.com, mhiramat@kernel.org, mingo@redhat.com, mingzhe.yang@ly.com, peterz@infradead.org, rostedt@goodmis.org, Finn Thain , senozhatsky@chromium.org, tfiga@chromium.org, will@kernel.org, stable@vger.kernel.org Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock pointers Message-ID: <20251014111125.731ab016@pumpkin> In-Reply-To: References: <20250909145243.17119-1-lance.yang@linux.dev> <99410857-0e72-23e4-c60f-dea96427b85a@linux-m68k.org> <20251007135600.6fc4a031c60b1384dffaead1@linux-foundation.org> <56784853-b653-4587-b850-b03359306366@linux.dev> <693a62e0-a2b5-113b-d5d9-ffb7f2521d6c@linux-m68k.org> <23b67f9d-20ff-4302-810c-bf2d77c52c63@linux.dev> <2bd2c4a8-456e-426a-aece-6d21afe80643@linux.dev> <3fa8182f-0195-43ee-b163-f908a9e2cba3@linux.dev> <3e0b7551-698f-4ef6-919b-ff4cbe3aa11c@linux.dev> <20251008210453.71ba81a635fc99ce9262be7e@linux-foundation.org> X-Mailer: Claws Mail 4.1.1 (GTK 3.24.38; arm-unknown-linux-gnueabihf) Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Thu, 9 Oct 2025 09:11:06 +0200 Geert Uytterhoeven wrote: > Hi Andrew, > > On Thu, 9 Oct 2025 at 06:04, Andrew Morton wrote: > > On Thu, 9 Oct 2025 10:01:18 +0800 Lance Yang wrote: > > > I think we fundamentally disagree on whether this fix for known > > > false-positive warnings is needed for -stable. > > > > Having the kernel send scary warnings to our users is really bad > > behavior. And if we don't fix it, people will keep reporting it. > > As the issue is present in v6.16 and v6.17, I think that warrants -stable. > > > And removing a WARN_ON is a perfectly good way of fixing it. The > > kernel has 19,000 WARNs, probably seven of which are useful :( > > Right. And there is panic_on_warn... Which, like panic_on_oops, panics before syslogd has a chance to write the error message to /var/log/kernel. Both are set in some environments. Tracking down those crashes is a right PITA. David > > Gr{oetje,eeting}s, > > Geert > > -- > Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org > > In personal conversations with technical people, I call myself a hacker. But > when I'm talking to journalists I just say "programmer" or something like that. > -- Linus Torvalds >