From mboxrd@z Thu Jan 1 00:00:00 1970 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC92DC64ED6 for ; Sun, 26 Feb 2023 19:51:08 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D991A6B0072; Sun, 26 Feb 2023 14:51:07 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id D49816B0073; Sun, 26 Feb 2023 14:51:07 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C37A26B0074; Sun, 26 Feb 2023 14:51:07 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id B17C56B0072 for ; Sun, 26 Feb 2023 14:51:07 -0500 (EST) Received: from smtpin01.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 3D47140338 for ; Sun, 26 Feb 2023 19:51:07 +0000 (UTC) X-FDA: 80510486574.01.CDC4BB7 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by imf04.hostedemail.com (Postfix) with ESMTP id 427964000A for ; Sun, 26 Feb 2023 19:51:04 +0000 (UTC) Authentication-Results: imf04.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=EfIBXqfA; spf=pass (imf04.hostedemail.com: domain of akpm@linux-foundation.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1677441065; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=kHFCXPWzSduSqK52+N+RPazPNDMnSbFnYjgJ7N6/n3Q=; b=sATPriSBPYAioMpMTtMTRYbv/0/kv2PzSSFrTyK9qYyuHQkMyI+idpufnYZCyUNFntVlCD WREN/iY/UlyiTvixsfV/jHwjkL81PaNfkWg27VwpPdnzz6gQIe1vVUoW4e0Gd420DC1s/3 JE7LeYJ6DBTJFxN4EqDem33oj++3frs= ARC-Authentication-Results: i=1; imf04.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=EfIBXqfA; spf=pass (imf04.hostedemail.com: domain of akpm@linux-foundation.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1677441065; a=rsa-sha256; cv=none; b=BPWQ19g6SYFHaEe21KSJJFCQy7t1UPeuX0Ck6zS0hRmErxUcgn+gt0eZA19DisnnLlq9DZ Urs2TIytB0jQyG0JCOTZUVTs67w1dObMvHgWiXJV8GSfofPduQTdtLVb7tqQiKte5JkpwS D4Z/AH4DAyHqbDJ9O03u28FRHqswZlU= 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 ams.source.kernel.org (Postfix) with ESMTPS id 8A749B80C8D; Sun, 26 Feb 2023 19:51:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 83AABC433D2; Sun, 26 Feb 2023 19:51:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1677441062; bh=2QXctkD8k3HFIzMIRhHltAB2/f2+KokissGTQsAOBGU=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=EfIBXqfAuly+kWLKq1/3UeS/SZpxE/UfiuKnucLBUhnsL+pzC3TOBPJCicsVnhyHI Hu8mdoYa1t/aK/e49MyuSuOXvvyDkSf9su6G7qIYhX/nFEaZ3AW560KtgYoOPU4Ur+ IE8zaxeJB+iQEI7NwYkurhGKaI+21NcLw2daev4M= Date: Sun, 26 Feb 2023 11:51:00 -0800 From: Andrew Morton To: Qi Zheng Cc: tkhai@ya.ru, hannes@cmpxchg.org, shakeelb@google.com, mhocko@kernel.org, roman.gushchin@linux.dev, muchun.song@linux.dev, david@redhat.com, shy828301@gmail.com, sultan@kerneltoast.com, dave@stgolabs.net, penguin-kernel@I-love.SAKURA.ne.jp, paulmck@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 0/8] make slab shrink lockless Message-Id: <20230226115100.7e12bda7931dd65dbabcebe3@linux-foundation.org> In-Reply-To: <20230226144655.79778-1-zhengqi.arch@bytedance.com> References: <20230226144655.79778-1-zhengqi.arch@bytedance.com> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 427964000A X-Rspam-User: X-Stat-Signature: 8ai135nmep5y7jfj37nsiwposooq5q4d X-HE-Tag: 1677441064-133631 X-HE-Meta: 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 amtuhL/c MEskRWnYdVIeO1CikRkPH3LLb9Z+cgHLf85L4BGYZfWppaffXdOTn+AB2RdTMIsBbU/z+LNV9+xqqQzswMsj67NVNZgj7dheE04TdSIXHaN+01JiFwpli4YTpakHKNOGf8IBnRr8blIRIcuewPxBbGOVCcFUWFfTkyV/iotc9L47WYOe3vUOUYWUuDcC9rqVJq2GkQGBBGZO0leQjspmT/QmYCxUqLiAT6vACDIyXAa+1jHDjKdObBuFjf2bZTqfGXOELipGGduW3Lw9xakezOAsPPa+JYZuCxtQQjBJzKPcmyqMpfN3LyS5ICiYmkGoDBAomQ1PwcOCQsDtjIWYnlVf7NXmAvbXsHAy0Sh7RgodZ/8AxFFz6Oo2cHjCFO7OkDLykPs6AmT1ZBuvcWT8iKqBaxg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Sun, 26 Feb 2023 22:46:47 +0800 Qi Zheng wrote: > Hi all, > > This patch series aims to make slab shrink lockless. What an awesome changelog. > 2. Survey > ========= Especially this part. Looking through all the prior efforts and at this patchset I am not immediately seeing any statements about the overall effect upon real-world workloads. For a good example, does this patchset measurably improve throughput or energy consumption on your servers?