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 61403C00A5A for ; Thu, 19 Jan 2023 13:59:27 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id CDE9C6B0072; Thu, 19 Jan 2023 08:59:26 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id C66EC6B0073; Thu, 19 Jan 2023 08:59:26 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B2E9F6B0074; Thu, 19 Jan 2023 08:59:26 -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 A0D346B0072 for ; Thu, 19 Jan 2023 08:59:26 -0500 (EST) Received: from smtpin17.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 51835120D7B for ; Thu, 19 Jan 2023 13:59:26 +0000 (UTC) X-FDA: 80371705932.17.15B5661 Received: from r3-19.sinamail.sina.com.cn (r3-19.sinamail.sina.com.cn [202.108.3.19]) by imf05.hostedemail.com (Postfix) with ESMTP id D50E710000F for ; Thu, 19 Jan 2023 13:59:22 +0000 (UTC) Authentication-Results: imf05.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf05.hostedemail.com: domain of hdanton@sina.com designates 202.108.3.19 as permitted sender) smtp.mailfrom=hdanton@sina.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1674136764; 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-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=AFTBn+22L61Jfk5h6t4YQw2ZMHvC4XcoMVsyJcW8fAY=; b=1538hQQuGcPUiIjjb4Ly4RN77F+zK3xJ188ysrySIdlPZOysuQPq0yxGTom02UfZI+oHU5 CF2cdzHIyRyENW6Zmo0IhC/fe6KHS+Fo8zYqnumZ4m+gXLyBLnv7ZCxYYgdNaNtrCRaSO3 V/TNndqA4HZyIJgMj1eSw1vTJBT3zz0= ARC-Authentication-Results: i=1; imf05.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf05.hostedemail.com: domain of hdanton@sina.com designates 202.108.3.19 as permitted sender) smtp.mailfrom=hdanton@sina.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1674136764; a=rsa-sha256; cv=none; b=nkwEFq5lenzFYF5WA9FFnLVMDNWIeCL9ai0UySACu8yiODjpZEOuFBEboZbT5Y0/HwYDRj xS4TSmK/UyAWQQLSC0xmJMEA4FfYqD/YvwDup/+AI6rUboxRko5OrMEOTsGRNXOw8xgRwB qU7zNCfn+yfuWEpe2n6nTbg2XYnbK7Q= Received: from unknown (HELO localhost.localdomain)([114.249.61.130]) by sina.com (172.16.97.35) with ESMTP id 63C94BDE00022E1B; Thu, 19 Jan 2023 21:55:43 +0800 (CST) X-Sender: hdanton@sina.com X-Auth-ID: hdanton@sina.com X-SMAIL-MID: 55343715073761 From: Hillf Danton To: Sebastian Andrzej Siewior Cc: Mel Gorman , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Davidlohr Bueso , linux-mm@kvack.org, LKML Subject: Re: [PATCH v2] locking/rwbase: Prevent indefinite writer starvation Date: Thu, 19 Jan 2023 21:59:03 +0800 Message-Id: <20230119135903.3524-1-hdanton@sina.com> In-Reply-To: References: <20230117083817.togfwc5cy4g67e5r@techsingularity.net> <20230117165021.t5m7c2d6frbbfzig@techsingularity.net> <20230119011538.3247-1-hdanton@sina.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: D50E710000F X-Rspamd-Server: rspam09 X-Rspam-User: X-Stat-Signature: 8tqp49xnos5kkt5euhmpyhy4gy85g77h X-HE-Tag: 1674136762-253858 X-HE-Meta: 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.009093, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, 19 Jan 2023 09:32:22 +0100 Sebastian Andrzej Siewior > > As far as Mel's efforts go, I am satisfied so far. If not because you can, could you specify why 4ms fails to cure starvation?