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=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 C0C8BC33CB1 for ; Fri, 17 Jan 2020 08:24:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8FD9B20728 for ; Fri, 17 Jan 2020 08:24:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="YPB5am7u" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729636AbgAQIY1 (ORCPT ); Fri, 17 Jan 2020 03:24:27 -0500 Received: from mail-pg1-f193.google.com ([209.85.215.193]:36728 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729317AbgAQIY1 (ORCPT ); Fri, 17 Jan 2020 03:24:27 -0500 Received: by mail-pg1-f193.google.com with SMTP id k3so11308540pgc.3 for ; Fri, 17 Jan 2020 00:24:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=c3CLbGH3yNmegqMMrTOsWM1VXAtdVUHSPp5sdhxItpE=; b=YPB5am7urRYdi3ZEg/wc/wYUlIoNarzwCR501g4ss4efAaGox/Tf/xNZL1/PFI9BLD tA/yPz7irn4d1SqeNQSJRfhDI7HNRpnralnmvN/mPSoFwj24VPVQ23oXgQ92iJlozJxm 998lr08BWiEO849l6fn03UuXyfCf0dkH+eNjlYh+zKJbx2kCk3GDcgjXgwlPLylFWl5Y B+a7zYi4ZouoNeo0nLtLTJ35dCfWMjaAI9myoD0YHmp1ZILfBz3hFeX+xIPdpaPcUNGC i2Gmpjy02T22QRYOWO4LduTo0HZDqAOx5lV1DWgdA2hY05Kh7I0SEjrz1zO/pJKtzD1J 2Rtg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=c3CLbGH3yNmegqMMrTOsWM1VXAtdVUHSPp5sdhxItpE=; b=Dj7amEyLvpxZ3l47HA5LnFQSkqHGpfbaIXW1/3epe1XV/jshxC+H2MoOjHM1VyrMgm NQm8vlfZP4G84eYuQOq7aH+OF4V11FbaLbRkAFnYuJiY3qJmDedTWQmycKDa4TybgRLY PvNVEshF4vpBSWuBZ2lVkIQbOtxQPHHmVmm79xi2BCu80VeQUIPn8gp4hL4rpQLpK6s0 xOSyyDW1ZUedYccJzeodVF/E0XG+XBQipWT5K9Hn5Ex55wBVDUK1EFu+mVz851Gv3WLA OyI3xEyI0NRUO2xAJI/JRSMFESn+vjGjy52E4SDUfvMEOatlRz/8eMQ7dIPXq4hAVGcg nzGw== X-Gm-Message-State: APjAAAUmaWcQ8GYF5tWkYM+4iLuuOenmjMS8gVeMgDpwauiJXbRmwqVL LkxA6duYks8iHlDxl30fpws= X-Google-Smtp-Source: APXvYqzYGKHy+cjwfqHiazgyLGUHkNRWvGtu8myj7Q3ns2krT7/XXq6cncKglnA05RG2OBg+a5QPMw== X-Received: by 2002:aa7:9edd:: with SMTP id r29mr1807945pfq.14.1579249466692; Fri, 17 Jan 2020 00:24:26 -0800 (PST) Received: from bj08259pcu1.spreadtrum.com ([117.18.48.82]) by smtp.gmail.com with ESMTPSA id d1sm6158471pjx.6.2020.01.17.00.24.23 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 17 Jan 2020 00:24:26 -0800 (PST) From: Jing Xia To: akpm@linux-foundation.org Cc: npiggin@gmail.com, rppt@linux.ibm.com, allison@lohutok.net, tglx@linutronix.de, linux-mm@kvack.org, linux-kernel@vger.kernel.org, yuming.han@unisoc.com, chunyang.zhang@unisoc.com, Jing Xia Subject: [RFC] lib/show_mem.c: extend show_mem() to support showing drivers' memory consumption Date: Fri, 17 Jan 2020 16:24:05 +0800 Message-Id: <1579249445-27429-1-git-send-email-jing.xia.mail@gmail.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jing Xia In low memory situations, sometimes we need to check how much memory a driver using.This patch add a notifer chain to show_mem.So a driver can show their memory usage when show_mem_extend() is called. Co-developed-by: Yuming Han Signed-off-by: Yuming Han Signed-off-by: Jing Xia --- include/linux/mm.h | 9 +++++++++ lib/show_mem.c | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 45 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index cfaa8fe..a37274a 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2201,6 +2201,15 @@ extern void memmap_init_zone(unsigned long, int, unsigned long, unsigned long, #ifdef __HAVE_ARCH_RESERVED_KERNEL_PAGES extern unsigned long arch_reserved_kernel_pages(void); #endif +enum show_mem_extend_type { + SHOW_MEM_EXTEND_BASIC, + SHOW_MEM_EXTEND_CLASSIC, + SHOW_MEM_EXTEND_ALL +}; +extern int register_show_mem_notifier(struct notifier_block *nb); +extern int unregister_show_mem_notifier(struct notifier_block *nb); +extern void show_mem_extend(unsigned int flags, nodemask_t *nodemask, + enum show_mem_extend_type type); extern __printf(3, 4) void warn_alloc(gfp_t gfp_mask, nodemask_t *nodemask, const char *fmt, ...); diff --git a/lib/show_mem.c b/lib/show_mem.c index 1c26c14..6b013cb 100644 --- a/lib/show_mem.c +++ b/lib/show_mem.c @@ -7,6 +7,8 @@ #include #include +#include +#include void show_mem(unsigned int filter, nodemask_t *nodemask) { @@ -42,3 +44,37 @@ void show_mem(unsigned int filter, nodemask_t *nodemask) printk("%lu pages hwpoisoned\n", atomic_long_read(&num_poisoned_pages)); #endif } + +static BLOCKING_NOTIFIER_HEAD(show_mem_notify_list); + +int register_show_mem_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&show_mem_notify_list, nb); +} +EXPORT_SYMBOL_GPL(register_show_mem_notifier); + +int unregister_show_mem_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_unregister(&show_mem_notify_list, nb); +} +EXPORT_SYMBOL_GPL(unregister_show_mem_notifier); + +void show_mem_extend(unsigned int filter, nodemask_t *nodemask, + enum show_mem_extend_type type) +{ + unsigned long used = 0; + struct sysinfo si; + + pr_info("Mem-Info-Extend:\n"); + show_mem(filter, NULL); + si_meminfo(&si); + pr_info("MemTotal: %8lu KB\n" + "Buffers: %8lu KB\n" + "SwapCached: %8lu KB\n", + (si.totalram) << (PAGE_SHIFT - 10), + (si.bufferram) << (PAGE_SHIFT - 10), + total_swapcache_pages() << (PAGE_SHIFT - 10)); + + blocking_notifier_call_chain(&show_mem_notify_list, + (unsigned long)type, &used); +} -- 1.9.1