From patchwork Thu Feb 15 21:59:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oscar Salvador X-Patchwork-Id: 13559175 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 E1FFEC4829E for ; Thu, 15 Feb 2024 21:58:19 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 8DD178D001C; Thu, 15 Feb 2024 16:58:12 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 868C88D0017; Thu, 15 Feb 2024 16:58:12 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 668778D001C; Thu, 15 Feb 2024 16:58:12 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 4D2CE8D0017 for ; Thu, 15 Feb 2024 16:58:12 -0500 (EST) Received: from smtpin18.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 0F3D6A0EF9 for ; Thu, 15 Feb 2024 21:58:12 +0000 (UTC) X-FDA: 81795402024.18.4EFF201 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.223.131]) by imf22.hostedemail.com (Postfix) with ESMTP id CF37BC001B for ; Thu, 15 Feb 2024 21:58:09 +0000 (UTC) Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=suse.de header.s=susede2_rsa header.b=xKXjuvM6; dkim=pass header.d=suse.de header.s=susede2_ed25519 header.b=ISzZj3yO; dkim=pass header.d=suse.de header.s=susede2_rsa header.b=xKXjuvM6; dkim=pass header.d=suse.de header.s=susede2_ed25519 header.b=ISzZj3yO; dmarc=pass (policy=none) header.from=suse.de; spf=pass (imf22.hostedemail.com: domain of osalvador@suse.de designates 195.135.223.131 as permitted sender) smtp.mailfrom=osalvador@suse.de ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1708034290; 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:dkim-signature; bh=TdFOtzOx20tmIdKDlysiVW3d7kQDyZIV9s1KqsDHXqU=; b=eC+S25xuOUxE/uE7P+8XMc0vnX2gmVFtrrzZH12h8yemfN3smsbv9nblZ3UgbvyIbnK0c6 8BDgfScL63aRzvISNmjci1TMpTDqdIQoN6sa3OiQdu32QkdgLvqaqTMsQq4SWOVXy/9nap DqFDxSdOUPhX0RI9w66iNDhNX785d+0= ARC-Authentication-Results: i=1; imf22.hostedemail.com; dkim=pass header.d=suse.de header.s=susede2_rsa header.b=xKXjuvM6; dkim=pass header.d=suse.de header.s=susede2_ed25519 header.b=ISzZj3yO; dkim=pass header.d=suse.de header.s=susede2_rsa header.b=xKXjuvM6; dkim=pass header.d=suse.de header.s=susede2_ed25519 header.b=ISzZj3yO; dmarc=pass (policy=none) header.from=suse.de; spf=pass (imf22.hostedemail.com: domain of osalvador@suse.de designates 195.135.223.131 as permitted sender) smtp.mailfrom=osalvador@suse.de ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1708034290; a=rsa-sha256; cv=none; b=CaIq9LIANyvEmZgfG+bO2HD1ZGG/nUBkNtUKs4hrUYqlaJdD8kZSBxARy32YfZa7UCSOhe U1CLZ7n3kYuMBy3B+zJlV/u67gTY16inNDYeIAK4MGhKGPU6sZb6zKUAeTAz0igQE1FUBc gCQWFsMipYQsvPXevFdIWTcDCPz5saY= Received: from imap2.dmz-prg2.suse.org (imap2.dmz-prg2.suse.org [10.150.64.98]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 665111FB3D; Thu, 15 Feb 2024 21:58:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1708034288; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=TdFOtzOx20tmIdKDlysiVW3d7kQDyZIV9s1KqsDHXqU=; b=xKXjuvM64ri4D1udjo/jUaR0xlKobKbyI/1DWsmWrRQm/ske/AndH267ENTEACSWoGiQ1K 8ETMBUYzKYV88SALUr1/KlcDe9zw0MBnWkpPXHLr+t3RP2R8ClJjBVnuFxArFufQl0yTxX bB767jlMSLQELB/TO3vVfQ0u8To9zAU= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1708034288; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=TdFOtzOx20tmIdKDlysiVW3d7kQDyZIV9s1KqsDHXqU=; b=ISzZj3yOabo2ChHLC1ocsTD4f+4ly25Gzqxmli5CBnhIYpISGnqIWI18xzqAUpZyD0OWNq YrATsok0rfl/DIAA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1708034288; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=TdFOtzOx20tmIdKDlysiVW3d7kQDyZIV9s1KqsDHXqU=; b=xKXjuvM64ri4D1udjo/jUaR0xlKobKbyI/1DWsmWrRQm/ske/AndH267ENTEACSWoGiQ1K 8ETMBUYzKYV88SALUr1/KlcDe9zw0MBnWkpPXHLr+t3RP2R8ClJjBVnuFxArFufQl0yTxX bB767jlMSLQELB/TO3vVfQ0u8To9zAU= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1708034288; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=TdFOtzOx20tmIdKDlysiVW3d7kQDyZIV9s1KqsDHXqU=; b=ISzZj3yOabo2ChHLC1ocsTD4f+4ly25Gzqxmli5CBnhIYpISGnqIWI18xzqAUpZyD0OWNq YrATsok0rfl/DIAA== Received: from imap2.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap2.dmz-prg2.suse.org (Postfix) with ESMTPS id 40B301346A; Thu, 15 Feb 2024 21:58:07 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap2.dmz-prg2.suse.org with ESMTPSA id SM9hCe+IzmXPAQAAn2gu4w (envelope-from ); Thu, 15 Feb 2024 21:58:07 +0000 From: Oscar Salvador To: Andrew Morton Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Michal Hocko , Vlastimil Babka , Marco Elver , Andrey Konovalov , Alexander Potapenko , Oscar Salvador Subject: [PATCH v10 6/7] mm,page_owner: Filter out stacks by a threshold Date: Thu, 15 Feb 2024 22:59:06 +0100 Message-ID: <20240215215907.20121-7-osalvador@suse.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240215215907.20121-1-osalvador@suse.de> References: <20240215215907.20121-1-osalvador@suse.de> MIME-Version: 1.0 X-Rspamd-Queue-Id: CF37BC001B X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: c5qiqbqph1yk8gd5r7pxgemhj6kiq4ac X-HE-Tag: 1708034289-809899 X-HE-Meta: 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 iFTsx5E2 I8zyDp1scnMhM+iwaephD4C4kBfGQxlp8yY6FLtJXK7ztzmb6N6f4qpaAoVFmRRg6tASgKbgzho+HElsjjXj3DtLJHkMT3BaCzw6davlL4lcJ2QuS00Mnb73BwyT8tvBhlKbrUSmYK91wJKXR/u/EjlB86LfJY6IoRhochg791gYocNqgoMItzALMiK1p3YmbwWH0ikGjtiswBSajcW3bw5l8/PaLpBiOfg53UC/Wa0FSoGGGUZOPHL9gs2dYlSHQBKgM 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: List-Subscribe: List-Unsubscribe: We want to be able to filter out the stacks based on a threshold we can can tune. By writing to 'count_threshold' file, we can adjust the threshold value. Signed-off-by: Oscar Salvador Reviewed-by: Vlastimil Babka --- mm/page_owner.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/mm/page_owner.c b/mm/page_owner.c index e99fbf822dd6..e56c1e92eccf 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -846,6 +846,8 @@ static void *stack_next(struct seq_file *m, void *v, loff_t *ppos) return stack; } +static unsigned long page_owner_stack_threshold; + static int stack_print(struct seq_file *m, void *v) { int i, stack_count; @@ -858,7 +860,8 @@ static int stack_print(struct seq_file *m, void *v) entries = stack_record->entries; stack_count = refcount_read(&stack_record->count) - 1; - if (!nr_entries || nr_entries < 0 || stack_count < 1) + if (!nr_entries || nr_entries < 0 || stack_count < 1 || + stack_count < page_owner_stack_threshold) return 0; for (i = 0; i < nr_entries; i++) @@ -891,6 +894,22 @@ static const struct file_operations page_owner_stack_operations = { .release = seq_release, }; +static int page_owner_threshold_get(void *data, u64 *val) +{ + *val = READ_ONCE(page_owner_stack_threshold); + return 0; +} + +static int page_owner_threshold_set(void *data, u64 val) +{ + WRITE_ONCE(page_owner_stack_threshold, val); + return 0; +} + +DEFINE_SIMPLE_ATTRIBUTE(proc_page_owner_threshold, &page_owner_threshold_get, + &page_owner_threshold_set, "%llu"); + + static int __init pageowner_init(void) { struct dentry *dir; @@ -905,6 +924,8 @@ static int __init pageowner_init(void) dir = debugfs_create_dir("page_owner_stacks", NULL); debugfs_create_file("show_stacks", 0400, dir, NULL, &page_owner_stack_operations); + debugfs_create_file("count_threshold", 0600, dir, NULL, + &proc_page_owner_threshold); return 0; }