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 0A53BC6FD1F for ; Sun, 12 Mar 2023 11:27:06 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id C4E4F8E0008; Sun, 12 Mar 2023 07:27:04 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id BD77D8E0010; Sun, 12 Mar 2023 07:27:04 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8A1FF8E0008; Sun, 12 Mar 2023 07:27:04 -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 7248D8E000E for ; Sun, 12 Mar 2023 07:27:04 -0400 (EDT) Received: from smtpin05.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 4D60C1C5FD1 for ; Sun, 12 Mar 2023 11:27:04 +0000 (UTC) X-FDA: 80560019568.05.3FFCC72 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by imf05.hostedemail.com (Postfix) with ESMTP id 2D8CB10000D for ; Sun, 12 Mar 2023 11:27:01 +0000 (UTC) Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=GsE6ukiM; spf=none (imf05.hostedemail.com: domain of kirill.shutemov@linux.intel.com has no SPF policy when checking 134.134.136.31) smtp.mailfrom=kirill.shutemov@linux.intel.com; dmarc=pass (policy=none) header.from=intel.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1678620422; 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=+t7c0GIEcRYZsAa/7kH4wF7e/+Xbyk3x8s2toycvq8M=; b=zMTJI2IeIsn2nIbn/DqyUI8pFCLCiGFnohqLNXFtKl/BBOhKVV3hkqJtlmmxcVMsib23Lw uvzXW7Xa6vJ6UqeGPI6mcZE/f/BtCIuktn4fCffweCGgWW++Pun+C6FG5pGAaMAzjbMJFy 0FS0iP58T1oCWAwCRLy2IfEKOSDuBWc= ARC-Authentication-Results: i=1; imf05.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=GsE6ukiM; spf=none (imf05.hostedemail.com: domain of kirill.shutemov@linux.intel.com has no SPF policy when checking 134.134.136.31) smtp.mailfrom=kirill.shutemov@linux.intel.com; dmarc=pass (policy=none) header.from=intel.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1678620422; a=rsa-sha256; cv=none; b=3JkaZC2Q7MK00mun/0i+o5ZYYA/JWlfS7WWioISGow0x2uxr6dzjBIY8x6hMarxijlYfAq fWHTR8NbEWA7bBArsUt8zbfG8+6BAIH1WulRknwnwA0tuQAk89VhmoV21TSSoiT3edhTDb Wc4KGjFMXss1cOWsIP4Yn1gxT8xP3N4= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1678620422; x=1710156422; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=dORBfkbxhzi1hEEMwZ37gZ5mNHOdLznvEXqItjRFy7I=; b=GsE6ukiM70jFK2f+Q8SXXhHan4cWoOT+Ye3o5qGzrDCbgpLdyawv7T4Y 0Wbn4DWfB97XZ9xajfZfyRsonqyz7d7qZlJYUQDLWLn09/58J3qS9hBdj VfaWbu4AMXE4WU8Bg/Wh5YgGkbRf98z7PyOfFm8O58o9IdWi9i/KpvoSC E88d/ROGZQ3tCgGTGZsGBjhBZtf2Whc/+gqikutvs3mbPUB92VEavRSKU zIqwSOwvqhIKb+4NfVoPZ9CnRx4gf2+0ADBoIXID5bSfEir3/syB9GDSW M4fG5vbXELAt4j5kVlEPiBZCK+wrnLShpRPp0rDy1mYxrSNi8FZC55L45 g==; X-IronPort-AV: E=McAfee;i="6500,9779,10646"; a="399577588" X-IronPort-AV: E=Sophos;i="5.98,254,1673942400"; d="scan'208";a="399577588" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Mar 2023 04:26:36 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10646"; a="671580737" X-IronPort-AV: E=Sophos;i="5.98,254,1673942400"; d="scan'208";a="671580737" Received: from nmoazzen-mobl1.amr.corp.intel.com (HELO box.shutemov.name) ([10.251.219.215]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Mar 2023 04:26:30 -0700 Received: by box.shutemov.name (Postfix, from userid 1000) id AF00310D7B7; Sun, 12 Mar 2023 14:26:19 +0300 (+03) From: "Kirill A. Shutemov" To: Dave Hansen , Andy Lutomirski , Peter Zijlstra Cc: x86@kernel.org, Kostya Serebryany , Andrey Ryabinin , Andrey Konovalov , Alexander Potapenko , Taras Madan , Dmitry Vyukov , "H . J . Lu" , Andi Kleen , Rick Edgecombe , Bharata B Rao , Jacob Pan , Ashok Raj , Linus Torvalds , linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" , Catalin Marinas Subject: [PATCHv16 09/17] mm: Expose untagging mask in /proc/$PID/status Date: Sun, 12 Mar 2023 14:26:04 +0300 Message-Id: <20230312112612.31869-10-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230312112612.31869-1-kirill.shutemov@linux.intel.com> References: <20230312112612.31869-1-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: u181xteheq6fkgf3rhsrtdzrfeyyz6tt X-Rspam-User: X-Rspamd-Queue-Id: 2D8CB10000D X-Rspamd-Server: rspam06 X-HE-Tag: 1678620421-268682 X-HE-Meta: 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 2ogU9LaL uekWP3FPCJAZK5WuIn1HF7VFr8XJ7QQOVadMuqmwp1YoTI9eUEptxHyOih6PIhqnuSHyRI4ZMysVEznV+kNlZjY2mrrnHZATkxpnGV6Ia0o3SBu8Kc0J7LQaarX6WW0jQtW41tWcnwQalymO8536CbJrCWhCzIQNxFc+wiU8NMjo9HbuaFOgNnpySO/mSp13lH/9IQAFuZLTOkDyITp4YlP1Y9hoDjf0yuogY6iRXv2lDM1DuUcob5kHZc1OgFLm/3IDtqqu/fqOZ/r+nuxt0tpqXIqfzXDXG7BIIQQrzx1o6kzbmx9tOkCmif4VeA1PiYj5VKRpOUFaCabr2gVGypydafZMt/6plg14gFDecK21SR4vOfNqTne7NjPU6pHJShL7FCbSR+NpSycypHyfIJj8lJZGGsD7+PCYb X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Add a line in /proc/$PID/status to report untag_mask. It can be used to find out LAM status of the process from the outside. It is useful for debuggers. Signed-off-by: Kirill A. Shutemov Acked-by: Catalin Marinas Acked-by: Peter Zijlstra (Intel) Tested-by: Alexander Potapenko --- arch/arm64/include/asm/mmu_context.h | 6 ++++++ arch/sparc/include/asm/mmu_context_64.h | 6 ++++++ arch/x86/include/asm/mmu_context.h | 6 ++++++ fs/proc/array.c | 7 +++++++ include/linux/mmu_context.h | 7 +++++++ 5 files changed, 32 insertions(+) diff --git a/arch/arm64/include/asm/mmu_context.h b/arch/arm64/include/asm/mmu_context.h index 72dbd6400549..56911691bef0 100644 --- a/arch/arm64/include/asm/mmu_context.h +++ b/arch/arm64/include/asm/mmu_context.h @@ -288,6 +288,12 @@ void post_ttbr_update_workaround(void); unsigned long arm64_mm_context_get(struct mm_struct *mm); void arm64_mm_context_put(struct mm_struct *mm); +#define mm_untag_mask mm_untag_mask +static inline unsigned long mm_untag_mask(struct mm_struct *mm) +{ + return -1UL >> 8; +} + #include #endif /* !__ASSEMBLY__ */ diff --git a/arch/sparc/include/asm/mmu_context_64.h b/arch/sparc/include/asm/mmu_context_64.h index 7a8380c63aab..799e797c5cdd 100644 --- a/arch/sparc/include/asm/mmu_context_64.h +++ b/arch/sparc/include/asm/mmu_context_64.h @@ -185,6 +185,12 @@ static inline void finish_arch_post_lock_switch(void) } } +#define mm_untag_mask mm_untag_mask +static inline unsigned long mm_untag_mask(struct mm_struct *mm) +{ + return -1UL >> adi_nbits(); +} + #include #endif /* !(__ASSEMBLY__) */ diff --git a/arch/x86/include/asm/mmu_context.h b/arch/x86/include/asm/mmu_context.h index eb1387ac40fa..06eaaf75d572 100644 --- a/arch/x86/include/asm/mmu_context.h +++ b/arch/x86/include/asm/mmu_context.h @@ -104,6 +104,12 @@ static inline void dup_lam(struct mm_struct *oldmm, struct mm_struct *mm) mm->context.untag_mask = oldmm->context.untag_mask; } +#define mm_untag_mask mm_untag_mask +static inline unsigned long mm_untag_mask(struct mm_struct *mm) +{ + return mm->context.untag_mask; +} + static inline void mm_reset_untag_mask(struct mm_struct *mm) { mm->context.untag_mask = -1UL; diff --git a/fs/proc/array.c b/fs/proc/array.c index 9b0315d34c58..6daea628bc76 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -91,6 +91,7 @@ #include #include #include +#include #include #include "internal.h" @@ -423,6 +424,11 @@ static inline void task_thp_status(struct seq_file *m, struct mm_struct *mm) seq_printf(m, "THP_enabled:\t%d\n", thp_enabled); } +static inline void task_untag_mask(struct seq_file *m, struct mm_struct *mm) +{ + seq_printf(m, "untag_mask:\t%#lx\n", mm_untag_mask(mm)); +} + int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, struct pid *pid, struct task_struct *task) { @@ -438,6 +444,7 @@ int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, task_mem(m, mm); task_core_dumping(m, task); task_thp_status(m, mm); + task_untag_mask(m, mm); mmput(mm); } task_sig(m, task); diff --git a/include/linux/mmu_context.h b/include/linux/mmu_context.h index b9b970f7ab45..14b9c1fa05c4 100644 --- a/include/linux/mmu_context.h +++ b/include/linux/mmu_context.h @@ -28,4 +28,11 @@ static inline void leave_mm(int cpu) { } # define task_cpu_possible(cpu, p) cpumask_test_cpu((cpu), task_cpu_possible_mask(p)) #endif +#ifndef mm_untag_mask +static inline unsigned long mm_untag_mask(struct mm_struct *mm) +{ + return -1UL; +} +#endif + #endif -- 2.39.2