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Tue, 25 Oct 2022 16:07:28 +0100 Date: Tue, 25 Oct 2022 16:07:28 +0100 Message-ID: <86mt9kdjrj.wl-maz@kernel.org> From: Marc Zyngier To: "Tyler Hicks (Microsoft)" Cc: Mark Rutland , Daniel Lezcano , Thomas Gleixner , Vijay Balakrishna , Will Deacon , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] clocksource/drivers/arm_arch_timer: Fix event stream param in Kconfig In-Reply-To: <20221025141854.22ppd7mw3vb6esgr@sequoia> References: <20221024195118.871907-1-code@tyhicks.com> <86pmegdwug.wl-maz@kernel.org> <20221025141854.22ppd7mw3vb6esgr@sequoia> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/27.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: code@tyhicks.com, mark.rutland@arm.com, daniel.lezcano@linaro.org, tglx@linutronix.de, vijayb@linux.microsoft.com, will@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221025_080734_010027_BD71282E X-CRM114-Status: GOOD ( 26.20 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Tyler, On Tue, 25 Oct 2022 15:18:54 +0100, "Tyler Hicks (Microsoft)" wrote: > > On 2022-10-25 11:24:55, Marc Zyngier wrote: > > Hi Tyler, > > > > On Mon, 24 Oct 2022 20:51:18 +0100, > > Tyler Hicks wrote: > > > > > > From: "Tyler Hicks (Microsoft)" > > > > > > Fix the event stream timer command line parameter name that's documented > > > in the Kconfig description for CONFIG_ARM_ARCH_TIMER_EVTSTREAM. It > > > didn't match the command line parameter name that's actually honored in > > > the source code. > > > > > > Reported-by: Vijay Balakrishna > > > Fixes: 46fd5c6b3059 ("clocksource/drivers/arm_arch_timer: Control the evtstrm via the cmdline") > > > Cc: stable@vger.kernel.org > > > > No, this really doesn't deserve a Cc: stable. This bit may be wrong, > > but we have the correct information in the kernel-parameters.txt file, > > which is authoritative AFAIC. > > Thanks for the review! > > I added the stable tag because it caused an actual waste of time in an > investigation. Upon discovering this option, I didn't notice the subtle > difference in cmdline parameter name from the Kconfig, to the > kernel-parameters.txt file and the code. I ran long-running stress tests > with the incorrect parameter name copied and pasted from the Kconfig. > This error resulted in a bad data point in the investigation and it took > a second set of eyes (Vijay's) to uncover my mistake days later when we > were trying to reconcile the bad data point with other good data points. I appreciate this has caused a certain waste of time, but the rules for stable inclusion are pretty clear: it has to be a runtime bug. Documentation bugs, as irritating as they are, do not fall into this category (it really *is* a typo). Thanks, M. -- Without deviation from the norm, progress is not possible. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel