From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 12F363D0A2 for ; Tue, 19 Dec 2023 20:48:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="t3XYfDYf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 576BAC433C8; Tue, 19 Dec 2023 20:48:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1703018883; bh=pJWiRH5YTOBpxpBmA8oQYKRGCFkGnuYnOdRkY/09ErU=; h=Date:To:From:Subject:From; b=t3XYfDYf1C6ZYWoJN1mcOOdXaRFzhGcsa0bo52rwR5SreGewLhDwevQ5hUWS4sWOs MDQaY+d2oGunTwTWh/qGglycTscFnX+HCKzTYqEXjX94uPM6Q3sscTc4UnZ5uMOEoW 6xV1havK+Bl9x7Mb8FwW4mVhfkkngwUX3yxQTSII= Date: Tue, 19 Dec 2023 12:48:02 -0800 To: mm-commits@vger.kernel.org,zhaoyang.huang@unisoc.com,sboyd@kernel.org,rdunlap@infradead.org,pmladek@suse.com,paulmck@kernel.org,kernel@pengutronix.de,keescook@chromium.org,geert+renesas@glider.be,elver@google.com,dianders@chromium.org,u.kleine-koenig@pengutronix.de,akpm@linux-foundation.org From: Andrew Morton Subject: + lib-add-note-about-process-exit-message-for-debug_stack_usage.patch added to mm-nonmm-unstable branch Message-Id: <20231219204803.576BAC433C8@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: lib: add note about process exit message for DEBUG_STACK_USAGE has been added to the -mm mm-nonmm-unstable branch. Its filename is lib-add-note-about-process-exit-message-for-debug_stack_usage.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lib-add-note-about-process-exit-message-for-debug_stack_usage.patch This patch will later appear in the mm-nonmm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Uwe Kleine-König Subject: lib: add note about process exit message for DEBUG_STACK_USAGE Date: Tue, 19 Dec 2023 19:28:09 +0100 DEBUG_STACK_USAGE doesn't only have an influence on the output of sysrq-T and sysrq-P, it also enables a message at process exit. See check_stack_usage() in kernel/exit.c where this is implemented. Link: https://lkml.kernel.org/r/20231219182808.210284-2-u.kleine-koenig@pengutronix.de Signed-off-by: Uwe Kleine-König Cc: Douglas Anderson Cc: Geert Uytterhoeven Cc: Kees Cook Cc: Marco Elver Cc: "Paul E. McKenney" Cc: Pengutronix Kernel Team Cc: Petr Mladek Cc: Randy Dunlap Cc: Stephen Boyd Cc: Zhaoyang Huang Signed-off-by: Andrew Morton --- lib/Kconfig.debug | 2 ++ 1 file changed, 2 insertions(+) --- a/lib/Kconfig.debug~lib-add-note-about-process-exit-message-for-debug_stack_usage +++ a/lib/Kconfig.debug @@ -763,6 +763,8 @@ config DEBUG_STACK_USAGE help Enables the display of the minimum amount of free stack which each task has ever had available in the sysrq-T and sysrq-P debug output. + Also emits a message to dmesg when a process exits if that process + used more stack space than previously exiting processes. This option will slow down process creation somewhat. _ Patches currently in -mm which might be from u.kleine-koenig@pengutronix.de are lib-add-note-about-process-exit-message-for-debug_stack_usage.patch