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 A605BC32789 for ; Mon, 22 Aug 2022 11:38:32 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 2AD048D0005; Mon, 22 Aug 2022 07:38:32 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 25D4B8D0001; Mon, 22 Aug 2022 07:38:32 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 14BF48D0005; Mon, 22 Aug 2022 07:38:32 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 06EF68D0001 for ; Mon, 22 Aug 2022 07:38:32 -0400 (EDT) Received: from smtpin14.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id CC87A8119D for ; Mon, 22 Aug 2022 11:38:31 +0000 (UTC) X-FDA: 79827030822.14.6E695DB Received: from relay.virtuozzo.com (relay.virtuozzo.com [130.117.225.111]) by imf27.hostedemail.com (Postfix) with ESMTP id 81CDD4002B for ; Mon, 22 Aug 2022 11:38:28 +0000 (UTC) Received: from dev011.ch-qa.sw.ru ([172.29.1.16]) by relay.virtuozzo.com with esmtp (Exim 4.95) (envelope-from ) id 1oQ5jW-00Gyo9-Jf; Mon, 22 Aug 2022 13:38:05 +0200 From: Alexander Atanasov To: Andrew Morton Cc: kernel@openvz.org, Alexander Atanasov , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v3 2/4] Enable balloon drivers to report inflated memory Date: Mon, 22 Aug 2022 14:37:45 +0300 Message-Id: <20220822113747.3630776-3-alexander.atanasov@virtuozzo.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220822113747.3630776-1-alexander.atanasov@virtuozzo.com> References: <20220822113747.3630776-1-alexander.atanasov@virtuozzo.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit ARC-Authentication-Results: i=1; imf27.hostedemail.com; dkim=none; spf=pass (imf27.hostedemail.com: domain of alexander.atanasov@virtuozzo.com designates 130.117.225.111 as permitted sender) smtp.mailfrom=alexander.atanasov@virtuozzo.com; dmarc=pass (policy=quarantine) header.from=virtuozzo.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1661168308; a=rsa-sha256; cv=none; b=n6LheOSDfTYTNOEh6diFcyh2NHkHKJBO3s/McGfC0+x2DyQFWN7545ENM75+8mT1Ng4bxz LtoLi/2ylR7IiiuNw+JQDWx6sPdyjHPu4fGtoFnH6xprQDYUCOGphJ6jsKN8r9Br9LuFC9 HvfTwVVEe1WwC5DuaGOSunh4WyBhs4w= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1661168308; 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=W1Qualv07jAb7hBW1fXyEkKq4YxXnRaD0fxYQrBWXEw=; b=cpdfm4mW6ZqgHhDrEYFCjfXGRiAGcV4XLtZui+/WUhvDRn5Dpf71PyfLYjxVbqmLhAiQ4w pC9ilAwAdJEDYmMaOCj4YlSM93ZTOHNYfGy2ApjNyVkbPI9+RgGfCNjUvQRozMlMIh4t8g h7ms8AzXL2C2aPS1zezVM/x02ZUyw78= X-Stat-Signature: 67fxdrnxxarococpsb79746yks5d38uc X-Rspamd-Queue-Id: 81CDD4002B X-Rspam-User: Authentication-Results: imf27.hostedemail.com; dkim=none; spf=pass (imf27.hostedemail.com: domain of alexander.atanasov@virtuozzo.com designates 130.117.225.111 as permitted sender) smtp.mailfrom=alexander.atanasov@virtuozzo.com; dmarc=pass (policy=quarantine) header.from=virtuozzo.com X-Rspamd-Server: rspam05 X-HE-Tag: 1661168308-543851 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: Add counters to be updated by the balloon drivers. Create balloon notifier to propagate changes. Signed-off-by: Alexander Atanasov --- include/linux/balloon.h | 18 ++++++++++++++++++ mm/balloon.c | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 54 insertions(+) diff --git a/include/linux/balloon.h b/include/linux/balloon.h index 46ac8f61f607..59657da77d95 100644 --- a/include/linux/balloon.h +++ b/include/linux/balloon.h @@ -57,6 +57,24 @@ struct balloon_dev_info { struct page *page, enum migrate_mode mode); }; +extern atomic_long_t mem_balloon_inflated_total_kb; +extern atomic_long_t mem_balloon_inflated_free_kb; + +void balloon_set_inflated_total(long inflated_kb); +void balloon_set_inflated_free(long inflated_kb); + +#define BALLOON_CHANGED_TOTAL 0 +#define BALLOON_CHANGED_FREE 1 + +int register_balloon_notifier(struct notifier_block *nb); +void unregister_balloon_notifier(struct notifier_block *nb); + +#define balloon_notifier(fn, pri) ({ \ + static struct notifier_block fn##_mem_nb __meminitdata =\ + { .notifier_call = fn, .priority = pri }; \ + register_balloon_notifier(&fn##_mem_nb); \ +}) + struct page *balloon_page_alloc(void); void balloon_page_enqueue(struct balloon_dev_info *b_dev_info, struct page *page); diff --git a/mm/balloon.c b/mm/balloon.c index 22b3e876bc78..8e1d5855fef8 100644 --- a/mm/balloon.c +++ b/mm/balloon.c @@ -7,8 +7,44 @@ #include #include #include +#include #include +atomic_long_t mem_balloon_inflated_total_kb = ATOMIC_LONG_INIT(0); +atomic_long_t mem_balloon_inflated_free_kb = ATOMIC_LONG_INIT(0); +SRCU_NOTIFIER_HEAD_STATIC(balloon_chain); + +int register_balloon_notifier(struct notifier_block *nb) +{ + return srcu_notifier_chain_register(&balloon_chain, nb); +} +EXPORT_SYMBOL(register_balloon_notifier); + +void unregister_balloon_notifier(struct notifier_block *nb) +{ + srcu_notifier_chain_unregister(&balloon_chain, nb); +} +EXPORT_SYMBOL(unregister_balloon_notifier); + +static int balloon_notify(unsigned long val) +{ + return srcu_notifier_call_chain(&balloon_chain, val, NULL); +} + +void balloon_set_inflated_total(long inflated_kb) +{ + atomic_long_set(&mem_balloon_inflated_total_kb, inflated_kb); + balloon_notify(BALLOON_CHANGED_TOTAL); +} +EXPORT_SYMBOL(balloon_set_inflated_total); + +void balloon_set_inflated_free(long inflated_kb) +{ + atomic_long_set(&mem_balloon_inflated_free_kb, inflated_kb); + balloon_notify(BALLOON_CHANGED_FREE); +} +EXPORT_SYMBOL(balloon_set_inflated_free); + static void balloon_page_enqueue_one(struct balloon_dev_info *b_dev_info, struct page *page) { -- 2.31.1