From patchwork Thu Oct 17 14:21:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oscar Salvador X-Patchwork-Id: 11196209 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 53BF814ED for ; Thu, 17 Oct 2019 14:22:19 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2AF152089C for ; Thu, 17 Oct 2019 14:22:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2AF152089C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 5CCE78E001A; Thu, 17 Oct 2019 10:21:41 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 52B498E0019; Thu, 17 Oct 2019 10:21:41 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3389A8E001A; Thu, 17 Oct 2019 10:21:41 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0038.hostedemail.com [216.40.44.38]) by kanga.kvack.org (Postfix) with ESMTP id E6DCD8E0019 for ; Thu, 17 Oct 2019 10:21:40 -0400 (EDT) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with SMTP id 88CBD180366FB for ; Thu, 17 Oct 2019 14:21:40 +0000 (UTC) X-FDA: 76053489960.28.lunch14_e92c9679df53 X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,osalvador@suse.de,:n-horiguchi@ah.jp.nec.com:mhocko@kernel.org:mike.kravetz@oracle.com::linux-kernel@vger.kernel.org:osalvador@suse.de,RULES_HIT:30003:30054,0,RBL:195.135.220.15:@suse.de:.lbl8.mailshell.net-62.2.6.2 64.100.201.201,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:suse.de-dnsbl7.mailshell.net-127.0.0.120,Custom_rules:0:0:0,LFtime:26,LUA_SUMMARY:none X-HE-Tag: lunch14_e92c9679df53 X-Filterd-Recvd-Size: 4565 Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) by imf34.hostedemail.com (Postfix) with ESMTP for ; Thu, 17 Oct 2019 14:21:39 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 9F88DB4C5; Thu, 17 Oct 2019 14:21:38 +0000 (UTC) From: Oscar Salvador To: n-horiguchi@ah.jp.nec.com Cc: mhocko@kernel.org, mike.kravetz@oracle.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Oscar Salvador Subject: [RFC PATCH v2 16/16] mm, soft-offline: convert parameter to pfn Date: Thu, 17 Oct 2019 16:21:23 +0200 Message-Id: <20191017142123.24245-17-osalvador@suse.de> X-Mailer: git-send-email 2.13.7 In-Reply-To: <20191017142123.24245-1-osalvador@suse.de> References: <20191017142123.24245-1-osalvador@suse.de> 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: From: Naoya Horiguchi Currently soft_offline_page() receives struct page, and its sibling memory_failure() receives pfn. This discrepancy looks weird and makes precheck on pfn validity tricky. So let's align them. Signed-off-by: Naoya Horiguchi Signed-off-by: Oscar Salvador Reviewed-by: David Hildenbrand --- drivers/base/memory.c | 7 +------ include/linux/mm.h | 2 +- mm/madvise.c | 2 +- mm/memory-failure.c | 17 +++++++++-------- 4 files changed, 12 insertions(+), 16 deletions(-) diff --git a/drivers/base/memory.c b/drivers/base/memory.c index b3cae2eb1c4f..b510b4d176c9 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -538,12 +538,7 @@ static ssize_t soft_offline_page_store(struct device *dev, if (kstrtoull(buf, 0, &pfn) < 0) return -EINVAL; pfn >>= PAGE_SHIFT; - if (!pfn_valid(pfn)) - return -ENXIO; - /* Only online pages can be soft-offlined (esp., not ZONE_DEVICE). */ - if (!pfn_to_online_page(pfn)) - return -EIO; - ret = soft_offline_page(pfn_to_page(pfn)); + ret = soft_offline_page(pfn); return ret == 0 ? count : ret; } diff --git a/include/linux/mm.h b/include/linux/mm.h index 0f80a1ce4e86..40722854d357 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2791,7 +2791,7 @@ extern int sysctl_memory_failure_early_kill; extern int sysctl_memory_failure_recovery; extern void shake_page(struct page *p, int access); extern atomic_long_t num_poisoned_pages __read_mostly; -extern int soft_offline_page(struct page *page); +extern int soft_offline_page(unsigned long pfn); /* diff --git a/mm/madvise.c b/mm/madvise.c index 9ca48345ce45..f83b7d4c68c1 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -890,7 +890,7 @@ static int madvise_inject_error(int behavior, if (behavior == MADV_SOFT_OFFLINE) { pr_info("Soft offlining pfn %#lx at process virtual address %#lx\n", pfn, start); - ret = soft_offline_page(page); + ret = soft_offline_page(pfn); } else { pr_info("Injecting memory failure for pfn %#lx at process virtual address %#lx\n", pfn, start); diff --git a/mm/memory-failure.c b/mm/memory-failure.c index c038896bedf0..bfecb61fc064 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1521,7 +1521,7 @@ static void memory_failure_work_func(struct work_struct *work) if (!gotten) break; if (entry.flags & MF_SOFT_OFFLINE) - soft_offline_page(pfn_to_page(entry.pfn)); + soft_offline_page(entry.pfn); else memory_failure(entry.pfn, entry.flags); } @@ -1834,7 +1834,7 @@ static int soft_offline_free_page(struct page *page) /** * soft_offline_page - Soft offline a page. - * @page: page to offline + * @pfn: pfn to soft-offline * * Returns 0 on success, otherwise negated errno. * @@ -1853,16 +1853,17 @@ static int soft_offline_free_page(struct page *page) * This is not a 100% solution for all memory, but tries to be * ``good enough'' for the majority of memory. */ -int soft_offline_page(struct page *page) +int soft_offline_page(unsigned long pfn) { int ret; - unsigned long pfn = page_to_pfn(page); + struct page *page; - if (is_zone_device_page(page)) { - pr_debug_ratelimited("soft_offline: %#lx page is device page\n", - pfn); + if (!pfn_valid(pfn)) + return -ENXIO; + /* Only online pages can be soft-offlined (esp., not ZONE_DEVICE). */ + page = pfn_to_online_page(pfn); + if (!page) return -EIO; - } if (PageHWPoison(page)) { pr_info("soft offline: %#lx page already poisoned\n", pfn);