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 X-Spam-Level: X-Spam-Status: No, score=-8.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4F560C432BE for ; Tue, 27 Jul 2021 12:19:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3284461A3D for ; Tue, 27 Jul 2021 12:19:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231877AbhG0MTK (ORCPT ); Tue, 27 Jul 2021 08:19:10 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:56750 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236347AbhG0MTI (ORCPT ); Tue, 27 Jul 2021 08:19:08 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1627388347; h=from:from: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; bh=Cyg4OzSfCVK2ArH8hMcR0QU6etJZdNnz5j7NaiTQwfM=; b=A1gqzgtgdu7+x37KOe4R+lmlTDVNXFYvhghjcMmRNIEKMbaGOVJUpwF4HvPh4/Ucc4ZJt1 qpTZXzPKYfMM5Pexkcvdp1jjTr6bc2vnDX4nSFwFGQvlCCnN4RhcaNyxCOb09zGOkhL+D/ /oPxxBwBpd0fgV0bFv924zRv/SGogXE= Received: from mail-wm1-f70.google.com (mail-wm1-f70.google.com [209.85.128.70]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-545-QhOI6nDHPjWvhWZjnArq8g-1; Tue, 27 Jul 2021 08:19:05 -0400 X-MC-Unique: QhOI6nDHPjWvhWZjnArq8g-1 Received: by mail-wm1-f70.google.com with SMTP id a25-20020a05600c2259b02902540009f03cso194496wmm.4 for ; Tue, 27 Jul 2021 05:19:05 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:organization :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=Cyg4OzSfCVK2ArH8hMcR0QU6etJZdNnz5j7NaiTQwfM=; b=njZpD9BfiXExbAXMf8Zl9VgeC42kuth9CI8o7NtTrarXxlCCPXwqeGwvGk7oMUuJ3w I7zICeVENvRaWzEk3SlTWvcqNmEeineqVCH08r2GmFysj3I/s9MT4NF+1NGTgOU5v/Yo w8BstS53pdp10KleKf1XCl+plxCUlngYMxPnyynpRIkR6P52zgZZltVk4bhBUvwH2SsJ +KlH3OgrT/LtKAp0U0snh4KD3iV++nuLgQ5w3vlw1fWvIT2reaOz3yZ8lZGCOkPNxfCS TWgDKtMA9p9IsYhZVYc9Z2FAQ59YR7LvP1blTLwMZURU6Zef2Tq0/Kh7tuKhLmQc9m7H ApVA== X-Gm-Message-State: AOAM530CHVcII8V3RHYmbcS863w+o8ut4RU1U6qc/Gu+DAVws7B00ke0 YvZ+nYeIAsNlDHDon67S+A42cJ2QgpWjN+1TtuB4vqduGyyqb0uxo9lv3NU61g6VVUQZT10uwx1 d5WXqBG9Bkg5yUNRx41JRe8MqfqILp07whQE5LXZLvEsyNp7xCpGlyd8sNSRhPAdMPudW X-Received: by 2002:a5d:6da3:: with SMTP id u3mr24255766wrs.394.1627388344546; Tue, 27 Jul 2021 05:19:04 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzoTD6xViLCv6Sh6eedwOX3/SDyry/1WTpnxYqWWSunam9tACK6ql5CgDJUDnxSNGHSYP0KSA== X-Received: by 2002:a5d:6da3:: with SMTP id u3mr24255732wrs.394.1627388344358; Tue, 27 Jul 2021 05:19:04 -0700 (PDT) Received: from [192.168.3.132] (p4ff23c36.dip0.t-ipconnect.de. [79.242.60.54]) by smtp.gmail.com with ESMTPSA id y66sm2904831wmy.39.2021.07.27.05.19.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 27 Jul 2021 05:19:03 -0700 (PDT) Subject: Re: [PATCH v2] mm: Enable suspend-only swap spaces To: Pavel Machek Cc: Michal Hocko , Evan Green , Andrew Morton , Alex Shi , Alistair Popple , Jens Axboe , Johannes Weiner , Joonsoo Kim , "Matthew Wilcox (Oracle)" , Miaohe Lin , Minchan Kim , Vlastimil Babka , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-api@vger.kernel.org References: <20210709105012.v2.1.I09866d90c6de14f21223a03e9e6a31f8a02ecbaf@changeid> <30dddfb1-388c-a593-0987-73e821216da9@redhat.com> <20210727120413.GB32265@duo.ucw.cz> From: David Hildenbrand Organization: Red Hat Message-ID: Date: Tue, 27 Jul 2021 14:19:02 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <20210727120413.GB32265@duo.ucw.cz> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-api@vger.kernel.org On 27.07.21 14:04, Pavel Machek wrote: > Hi! > >> Let's take a look at hibernate() callers: >> >> drivers/mfd/tps65010.c: calls hibernate() from IRQ contex, based on HW >> event > > No it does not. Look again. > Oh, dead code :) >> kernel/power/autosleep.c: calls hibernate() when it thinks it might be >> a good time to go to sleep > > Ok, you are right, it is there. But I don't believe anyone uses this > configuration. If it's dead code, we might want to look into deprecating and removing it. It was introduced around 2012: https://lwn.net/Articles/479841/ -- Thanks, David / dhildenb