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=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 853E9C33CB6 for ; Fri, 17 Jan 2020 08:24:29 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 493512082F for ; Fri, 17 Jan 2020 08:24:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="YPB5am7u" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 493512082F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id D76BB6B032D; Fri, 17 Jan 2020 03:24:28 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id CFE5D6B032E; Fri, 17 Jan 2020 03:24:28 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C146E6B032F; Fri, 17 Jan 2020 03:24:28 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0171.hostedemail.com [216.40.44.171]) by kanga.kvack.org (Postfix) with ESMTP id A6B276B032D for ; Fri, 17 Jan 2020 03:24:28 -0500 (EST) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with SMTP id 69BE740D0 for ; Fri, 17 Jan 2020 08:24:28 +0000 (UTC) X-FDA: 76386439416.18.rule19_44173ea757f19 X-HE-Tag: rule19_44173ea757f19 X-Filterd-Recvd-Size: 5625 Received: from mail-pg1-f194.google.com (mail-pg1-f194.google.com [209.85.215.194]) by imf17.hostedemail.com (Postfix) with ESMTP for ; Fri, 17 Jan 2020 08:24:27 +0000 (UTC) Received: by mail-pg1-f194.google.com with SMTP id k197so11287061pga.10 for ; Fri, 17 Jan 2020 00:24:27 -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=Too9v2cZMA06MpDHbT1MLtDXqZGJhocPk258qBtau+rry4sBJXROcxBCjD24dsJhFv zc0dX3X7xxynKoGWmK1UVAaAwosHUu7ntIXjOIfSXKOiuo9ZKtUqLUhAZCLNS+qMtoRk h5G1b6kDEbW5/UpqE7C5mTa53YjjC8ItoptUmhwU3OfCM1hJfldA4KS7Hl4qO9ZZVfUK 0lV3O7oFdSq91Kb31JVjP+klDyv+E+HVKMFfxrf6U3wVKowVw24CZnUFCTg4MGJ+yRzN Z2vPmBzRZ5Vm4ZrUzVhiAPjdGd1drgt5vSbsBUTMmAIYE1rBc8Fd1N1XBnQIhm/W/8+n 3cRg== X-Gm-Message-State: APjAAAUrXC6KSZJEgU8BWpYKi6RGsMndEqPtceu3XXgWDBQZ0g6EnYv0 RWQT/csK016JUUoXkxmy/6o= 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 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: 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