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 C5C593876AE; Wed, 21 Jan 2026 19:58:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769025512; cv=none; b=i0hgKXf4HVPOEyx785vzkT96Y9JEqaDl7s7OQg6dwZ7cH6XEgHrZ1isKuHzucGxqlKRFTtaw3aSeoTeOBQJ0h3GJ1eP9yruaQIEXnFkMRkesGCr8RrXo64nf5IFKscFBW9GEk8uOuGeBjCo5jLFfIeN/oXspB9+dt78/uBvxgG4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769025512; c=relaxed/simple; bh=u9hB4pLwe6JOFHSSDGj57dMWborYAw5noiN3Xu+JTOg=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=M84n6qzoswi91zFhv+qx0iKs/lZhZS5J7WySGlhgdulhfKt8Ga33T3gK8a+J7Clo6fFuOxKKTHbLNQmaJs1RVMSC6xw/SGJFT82y9slHOfxT2pYxGfJIH9xAYbCfQMs2PrFdH2qk4y2qzfwl0FFsIvFAbFwabIu8xd7VV3cHSNU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=N7sB6IZh; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="N7sB6IZh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 619D7C4CEF1; Wed, 21 Jan 2026 19:58:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1769025512; bh=u9hB4pLwe6JOFHSSDGj57dMWborYAw5noiN3Xu+JTOg=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=N7sB6IZhUHWc5akko4O9pcNu+4NTfQ/BJz7xwCeiVOAlMwN9t0otepE8ObQ+48jXq b9fJB91VE6sBYxuDJIlBAWUxWY1Qwr8ssmORpfahbFy2l4eIMiDmm1nC+9QsYLP0ZN CcOmEnM6//mwhpeOqlNSYGXIYBVfle+GEMI34qveqNqaC0K9ck6MRd9LdMAyufy2ol 8oJpgvrnO4JHBW8lRFW8HZG7X+VEkwiDi9LQtGlcqPNKtaY94DZveg0hgfxe7PCTFO 2puxDOxKYib5CoA0Pl4eawd4NU9CTpWZjP93yZ/crj2dMO5PJucXzrI4oha5Ex0gs6 SzFIfbpUrgeMg== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 03E5DCE0B79; Wed, 21 Jan 2026 11:58:32 -0800 (PST) Date: Wed, 21 Jan 2026 11:58:31 -0800 From: "Paul E. McKenney" To: Joel Fernandes Cc: linux-kernel@vger.kernel.org, Boqun Feng , rcu@vger.kernel.org, Frederic Weisbecker , Neeraj Upadhyay , Josh Triplett , Uladzislau Rezki , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Zqiang Subject: Re: [PATCH -next v3 0/3] rcu/nocb: Cleanup patches for next merge window Message-ID: Reply-To: paulmck@kernel.org References: <20260119231223.989409-1-joelagnelf@nvidia.com> <78a11bfa-4613-450d-bc3c-238e0b44557b@paulmck-laptop> 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-Disposition: inline In-Reply-To: On Wed, Jan 21, 2026 at 02:50:54PM -0500, Joel Fernandes wrote: > > > On 1/21/2026 2:41 PM, Paul E. McKenney wrote: > > On Wed, Jan 21, 2026 at 02:13:56PM -0500, Joel Fernandes wrote: > >> > >> > >> On 1/21/2026 2:09 PM, Paul E. McKenney wrote: > >>> On Mon, Jan 19, 2026 at 06:12:20PM -0500, Joel Fernandes wrote: > >>>> These are a few nocb related cleanup patches for the next merge window. > >>>> > >>>> Also Frederic please object to the second patch ("Remove dead callback overload > >>>> handling") if you would like, but I think based on our discussion I have > >>>> implemented your suggestion, so it should be good. > >>>> > >>>> Changes from v2: > >>>> - Dropped patch 2 "Add warning if no rcuog wake up attempt happened during > >>>> overload" as it was not needed since we removed the dead CB overload handling. > >>>> - Replaced "Add warning to detect if overload advancement is ever useful" with > >>>> "Remove dead callback overload handling" per Frederic's feedback - instead of > >>>> adding a warning, just remove the dead code path entirely. > >>>> > >>>> nocb rcutorture scenarios passed overnight testing on my system. > >>> > >>> I reverted three of your earlier patches in order to apply this, only > >>> one of which I am really confident in. Please check my -rcu tree to see > >>> if any of the three should be added back in, and I am starting tests in > >>> the meantime.Age Commit message (Expand) Author Files Lines > >> > >> Per your latest /dev branch > >> (https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git/log/?h=dev), > >> you have the latest 3 patches: > >> > >> Extract nocb_defer_wakeup_cancel() helperdev Joel Fernandes 1 -8/+11 > >> rcu/nocb: Remove dead callback overload handling Joel Fernandes 1 -12/+0 > >> rcu/nocb: Remove unnecessary WakeOvfIsDeferred wake path Joel Fernandes 3 -36/+18 > > > > Thank you for checking! > > > > And just to double-check, all of the patches that I reverted are obsolete, > > correct? > > Yes, those patches were from v2. You have correctly applied the latest v3 version. Woo-hoo!!! ;-) Thanx, Paul