From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) (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 EA4343B8D7E; Tue, 9 Dec 2025 00:38:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=216.40.44.14 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765240740; cv=none; b=h88FVJDjOGaq+LG+D+PWTqa64ims2Jlnpc+Hxu2CTQyDuScyAwKP6SQ3ZNACU1em1qCfDvsMA2j2Zd9XcWfsxk7mz79qLCWsqokkZ+TVSRJH9fMaOiHgOvJKSHjnd3ylJx6rRHfJYgfefv5I8A/NpVEINBlucCc/txg0dUvOAKk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765240740; c=relaxed/simple; bh=K5SZ53rvRg+l4CX4EBlALPhPJQhW/y0zMG1HwyKwauE=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=R9n45+Gh1zzdpWzKpFs+U1Uql2vCLq721UBZnoPuiR82MDON3OTtwNx+hSeT5yDsttOjHElR1UEhSQC6OvsJS9a2rVh3Z6hCrxynnKUP4CWPDd5okbdsSHlXvbAmGJkwYciW5jiQGcaGPJh0N1RuZRTbCjDGe3pVsgPhC7aoEW4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=goodmis.org; spf=pass smtp.mailfrom=goodmis.org; arc=none smtp.client-ip=216.40.44.14 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=goodmis.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=goodmis.org Received: from omf14.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id B960D13A941; Tue, 9 Dec 2025 00:38:56 +0000 (UTC) Received: from [HIDDEN] (Authenticated sender: rostedt@goodmis.org) by omf14.hostedemail.com (Postfix) with ESMTPA id E705F30; Tue, 9 Dec 2025 00:38:53 +0000 (UTC) Date: Mon, 8 Dec 2025 19:38:49 -0500 From: Steven Rostedt To: "Paul E. McKenney" Cc: linux-kernel@vger.kernel.org, Mathieu Desnoyers , Sebastian Andrzej Siewior , bpf@vger.kernel.org Subject: Re: [PATCH v3] tracing: Guard __DECLARE_TRACE() use of __DO_TRACE_CALL() with SRCU-fast Message-ID: <20251208193849.3a51648a@debian> In-Reply-To: <075fd9e5-2db8-4030-9364-0be5e22e9902@paulmck-laptop> References: <20251208044352.38360456@debian> <075fd9e5-2db8-4030-9364-0be5e22e9902@paulmck-laptop> X-Mailer: Claws Mail 4.3.1 (GTK 3.24.51; x86_64-redhat-linux-gnu) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Stat-Signature: 4jwx8sbbass9mdh3tu1ap3egb3wfkksn X-Rspamd-Server: rspamout03 X-Rspamd-Queue-Id: E705F30 X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Session-ID: U2FsdGVkX19derb2eVp8QjlHpOljct6+9mc+dJwWLNI= X-HE-Tag: 1765240733-482286 X-HE-Meta: U2FsdGVkX1+rIEqrvrEFWEx8WUkjrN72JFefj5I8vS5+kDbTTwJgUeJzawmsJIHTEKS3IlkcnkpVZ8hOzayipuxSAFk/FPEB8Q7sqiGF945pYXmo4MpTjDH5eIws/BdpHuodSQ4RSzjT4KH3aa0k1n4S3pVU3CQ1RfYaw73xJH+2Fp+fw24WumugZjez4IRkM6hWb4BDbXYW0CyJjeGWqrQ3MxuasMMLABaYUBMYkLpw/lWfBaJcwRsey45vKORk1zVLRuEuoiHwdeeqtYgJHQWdZiHxCiG80PManPLszhh8Bmt9yNXqmhivEWQtFiSOQltA1KqBXbVsAZssWxJcYExGybgMNjAR On Mon, 8 Dec 2025 12:46:32 -0800 "Paul E. McKenney" wrote: > > bash-1165 [001] DBZ.f 269.955762: sys_rt_sigaction -> 0x0 > > ^^^^^ > > This is just garbage. > > Yes, but is is the original garbage, and garbage obtained by acceding > to your request. ;-) Yes, here's what it looks like before patch: bash-1168 [001] ..... 77.498737: sys_wait4 -> 0xfffffffffffffff6 bash-1168 [001] ..... 77.498740: sys_rt_sigreturn() bash-1168 [001] ..... 77.498765: sys_rt_sigaction(sig: 2, act: 0x7ffef2f08c50, oact: 0x7ffef2f08cf0, sigsetsize: 8) bash-1168 [001] ..... 77.498770: sys_rt_sigaction -> 0x0 bash-1168 [001] ..... 77.498794: sys_rt_sigprocmask(how: 0, nset: 0, oset: 0x7ffef2f08c70, sigsetsize: 8) bash-1168 [001] ..... 77.498795: sys_rt_sigprocmask -> 0x0 bash-1168 [001] ..... 77.499055: sys_write(fd: 1, buf: 0x562f0f3aba90 (1b:5d:38:30:30:33:3b:65:6e:64:3d:36:62:62:34:38:38:39:38:2d:32:33:31:33:2d:34:64:38:30:2d:39:30:62:39 :2d:66:33:63:31:36:36:37:62:63:37:37:34:3b:65:78:69:74:3d:73:75:63:63:65:73:73:1b:5c) ".]8003;end=6bb48898-2313-4d80-90b9-f3c1667bc774;exit=success.\", count: 0x3e) bash-1168 [001] .l... 77.499099: sys_write -> 0x3e bash-1168 [001] ..... 77.499196: sys_rt_sigprocmask(how: 0, nset: 0, oset: 0x7ffef2f080c0, sigsetsize: 8) bash-1168 [001] ..... 77.499198: sys_rt_sigprocmask -> 0x0 [ that lone "l" (el not one) is LAZY_NEED_RESCHED ] After adding the patch: bash-1212 [005] DBZ.f 72.179808: sys_rt_sigprocmask -> 0x0 bash-1212 [005] DBZ.f 72.179811: sys_ioctl(fd: 0xff, cmd: 0x5401, arg: 0x7ffcaef0e1b0) bash-1212 [005] DBZ.f 72.179815: sys_ioctl -> 0x0 bash-1212 [005] DBZ.f 72.179818: sys_ioctl(fd: 0xff, cmd: 0x5413, arg: 0x7ffcaef0e1c0) bash-1212 [005] DBZ.f 72.179823: sys_ioctl -> 0x0 bash-1212 [005] DBZ.f 72.179862: sys_rt_sigprocmask(how: 2, nset: 0x7ffcaef0e290, oset: 0, sigsetsize: 8) bash-1212 [005] DBZ.f 72.179866: sys_rt_sigprocmask -> 0x0 bash-1212 [005] DBZ.f 72.179884: sys_wait4(upid: 0xffffffffffffffff, stat_addr: 0x7ffcaef0db50, options: 0xb, ru: 0) bash-1212 [005] DBZ.f 72.179891: sys_wait4 -> 0xfffffffffffffff6 bash-1212 [005] DBZ.f 72.179894: sys_rt_sigreturn() > > Perhaps a little bit more constructively, have your conflicting changes > hit mainline yet? All my changes have hit mainline. I believe I did have a solution for fixing the above issue but I was planning to implement it after the merge window. I can probably do that today during the keynotes ;-) -- Steve