From patchwork Wed Mar 22 19:44:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frederic Weisbecker X-Patchwork-Id: 13184539 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D7640C6FD1F for ; Wed, 22 Mar 2023 19:45:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229539AbjCVTpS (ORCPT ); Wed, 22 Mar 2023 15:45:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52616 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229796AbjCVTpQ (ORCPT ); Wed, 22 Mar 2023 15:45:16 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1A37A305E0; Wed, 22 Mar 2023 12:45:05 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id AAA1C622AF; Wed, 22 Mar 2023 19:45:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4F738C433D2; Wed, 22 Mar 2023 19:45:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1679514304; bh=PPkDyBVVf8w8v6mw+4XPEuSPjWp6kxHOeiuCNFfBI38=; h=From:To:Cc:Subject:Date:From; b=HcWR+Ff+mJbTZ0G5yBcSNlIGCRNjfC/0Kdp9cp8WdHWqAaJ0+an/R5Mac/g5WjFPe 64t/xa4KeUdJXCUjljOBoY+UVPMUxa6hnVivDCaPu7dQhqJqJmrS7/w5unHOxNLru+ yHhfD1P9UwrLQ/TKq/Sv1s2KisBn7BuCnLOgGajPxs3U2chDZD0Ss50H4EkHy18f97 RnKts3CsAOUKPhwfJpFdDpGeM90QZpi76Q+9tN28DSdf25JMJwdhtFRhqJrCzIzss/ Ax1YbFf7BIm4gDYd6y+rf/DCtnBc5GblaBCCKB+yVuh1OHoo0BN2tnOogNFoKFnP5X JZDCq6xpQVPeg== From: Frederic Weisbecker To: "Paul E . McKenney" Cc: LKML , Frederic Weisbecker , rcu , Uladzislau Rezki , Neeraj Upadhyay , Boqun Feng , Joel Fernandes Subject: [PATCH 0/4] rcu/nocb: Shrinker related boring fixes Date: Wed, 22 Mar 2023 20:44:52 +0100 Message-Id: <20230322194456.2331527-1-frederic@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org Hi, Just a couple of boring fixes related to the shrinker. 1/4: is related to (de-)offloading so the issue only concerns rcutorture right now (which doesn't seem to test lazy so hardly possible to trigger). 2/4: fix ignored flush, making the shrinker more efficient but nothing critical. 3/4: optimization 4/4: optimization As such none of these patches carry a "Fixes:" because none fix an actual regression. Nothing worth backportng. Frederic Weisbecker (4): rcu/nocb: Protect lazy shrinker against concurrent (de-)offloading rcu/nocb: Fix shrinker race against callback enqueuer rcu/nocb: Recheck lazy callbacks under the ->nocb_lock from shrinker rcu/nocb: Make shrinker to iterate only NOCB CPUs kernel/rcu/tree_nocb.h | 43 +++++++++++++++++++++++++++++++++++++----- 1 file changed, 38 insertions(+), 5 deletions(-)