From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2240722371B for ; Fri, 21 Mar 2025 11:37:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742557042; cv=none; b=tI5l9KGSfJkKVE7fF5dXStA0PGFI525p+tE8AOG+I2+4vZlVBUXDXd6PpxyjAZjuXR+HMWprFTwBrLftGlcTExQu4Dh1LdvBalxdtNe2X2BmdqAa7PFFz+MZDIdzy+eHJv4DIef8TUEG6O2LwsSu0/CvPEJBpawQPly3FpN+4Gs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742557042; c=relaxed/simple; bh=XqLEM356KJ4Nr3KBH7m+aoqP3r0tyveu5sLdaxismyE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mZO3u5b9sDbywBF4xGGLMrkWrZ19vTl7r43iq1+714D7TtWV85sSVK5EFGaUiwMI9tov1RHCz7drUrY9fiN5Gu9WuX3B28BqWwOLcGTs9DsHnc0ccMsMbekdSL+Pzm7OZszqQVf7VqYv5JvTDoLHbV9Z67r61y2PlFB/niRVBtI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=ZNiyceq6; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ZNiyceq6" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1742557040; h=from:from:reply-to:subject:subject: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=/AdkIGrCnMsc+er9X66uqVETmxKiULUWSewMsh5Pldk=; b=ZNiyceq6mVerUlngThger5Bp4PHwJ8/EXAlLpA980qEtSfJ3ikz72XFYvnMu6uaaaG3LM9 oM9Kegy9PlqCeB4jAh9z8qapARf9xJ4vVR1uRmOt4OVD9rnFzUVyFsDVow3CIHaP/3FJzx /HrONctspIWKVRrCnz1JzyJrPDuBrsI= Received: from mail-wr1-f72.google.com (mail-wr1-f72.google.com [209.85.221.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-137-61Lj-RZwMUmOpwU4foVkOw-1; Fri, 21 Mar 2025 07:37:18 -0400 X-MC-Unique: 61Lj-RZwMUmOpwU4foVkOw-1 X-Mimecast-MFC-AGG-ID: 61Lj-RZwMUmOpwU4foVkOw_1742557038 Received: by mail-wr1-f72.google.com with SMTP id ffacd0b85a97d-39143311936so882682f8f.0 for ; Fri, 21 Mar 2025 04:37:18 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1742557037; x=1743161837; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=/AdkIGrCnMsc+er9X66uqVETmxKiULUWSewMsh5Pldk=; b=Ba2zjpPVaxTo2pb2lzORlUZ863WiJ+9cW6JnT5k9mXvdjXE1QMBDc6jW7ylpJ/jcQJ ThGTPYNXb/Vd8vEtraw547lGOJ6R/py+W6GgkLyiQQdpvETMgHGlgGwSDMSnHJ9ZLDBc JLwLPlHYWXgoiMduglbUMR+oVkn5xddXuUtxWdP2F18Xfe0VpTmpdYFeKShRlKxclOh5 sW1+a79mLi3MroLsy0vrvlEv3J/FpcJ31EYIa1KwL8FYAkLkI/Xlcq44kW9PrJPx8C8Z a8kBkxY/n9EbHXfVu3zaAdUB5hoKERwHDL9LFhQL9JQIpCVyJTcgPu7nSmWs48g2OR5T RF7w== X-Forwarded-Encrypted: i=1; AJvYcCWYOw1/GJ7mZJJseTQmLgmfvHqER0I1vOcPTE40huLUR0dwF4QMvv9DXFIr4kgirtRrv6yKCpR1qM1cvoCBbxkU@vger.kernel.org X-Gm-Message-State: AOJu0YyZ7aNsQSgbR2VKUbh8Rb1z9Jf9Ul2rZXA9lyRbvltAFVlt3PrN FypjaNtMNcYYvEQ+Wynl7ZzfXmBOIq10rR78TpzashyuqFeOLQ47KojMeVqvTO61ofYM2pN1TtY yE+3w1ncdfzrJ/WeueuvfierA+C3c3e415k5NYuxgwjc2o2sabU8xNVBOOUOspwaQNDk= X-Gm-Gg: ASbGnctbibvYpv4Q0NksCP3e65ArxyknHDHIjEjOENKZK0axIlwk8dJcnIoUHK7ZMuL D6BuEIYBQ+MVn7LftO9hUENclVmbA98ZoY9DUvdLeAxYQv0+yk3NMJqQggnpHrp8AzC1nmv8tdL eHh50eu6HWB/nDEdH7HMapqLXuaJaQLnx5Hmgg+7FaJeGR+a/LCcy7s3S9b0kapMYiwpCTmRH3b tP6wHW3tZCogyn9aPGJCNvATeK0yuQwwOx7+sZyIzt1in6cY4ljIlhzwjBZdtWBkiGFziIMHpAG PN0u4QtOM1fTq6Z56IPvtsa7wbdrs9HKXQXeNb8Lo5NGEUBdbcD6DQf5EDXbNP+rY1xHwatn2rm l X-Received: by 2002:a05:6000:144c:b0:390:ea34:7d83 with SMTP id ffacd0b85a97d-3997f90e7c2mr2841353f8f.31.1742557037619; Fri, 21 Mar 2025 04:37:17 -0700 (PDT) X-Google-Smtp-Source: AGHT+IG49ODTrypvf9tYQ5TgQ34vttK3IHB4Rj01M+eydlpDxfAmjxfWJ7Zgo7XydYKuCca6cGe7VQ== X-Received: by 2002:a05:6000:144c:b0:390:ea34:7d83 with SMTP id ffacd0b85a97d-3997f90e7c2mr2841314f8f.31.1742557037213; Fri, 21 Mar 2025 04:37:17 -0700 (PDT) Received: from localhost (p200300cbc72a910023d23800cdcc90f0.dip0.t-ipconnect.de. [2003:cb:c72a:9100:23d2:3800:cdcc:90f0]) by smtp.gmail.com with UTF8SMTPSA id ffacd0b85a97d-3997f9a3f36sm2189825f8f.32.2025.03.21.04.37.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 21 Mar 2025 04:37:16 -0700 (PDT) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-trace-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, David Hildenbrand , Andrew Morton , Andrii Nakryiko , Matthew Wilcox , Russell King , Masami Hiramatsu , Oleg Nesterov , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , "Liang, Kan" , Tong Tiangen Subject: [PATCH v3 1/3] kernel/events/uprobes: pass VMA instead of MM to remove_breakpoint() Date: Fri, 21 Mar 2025 12:37:11 +0100 Message-ID: <20250321113713.204682-2-david@redhat.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250321113713.204682-1-david@redhat.com> References: <20250321113713.204682-1-david@redhat.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit ... and remove the "MM" argument from install_breakpoint(), because it can easily be derived from the VMA. Acked-by: Oleg Nesterov Signed-off-by: David Hildenbrand --- kernel/events/uprobes.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index 5d6f3d9d29f44..259038d099819 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -1134,10 +1134,10 @@ static bool filter_chain(struct uprobe *uprobe, struct mm_struct *mm) return ret; } -static int -install_breakpoint(struct uprobe *uprobe, struct mm_struct *mm, - struct vm_area_struct *vma, unsigned long vaddr) +static int install_breakpoint(struct uprobe *uprobe, struct vm_area_struct *vma, + unsigned long vaddr) { + struct mm_struct *mm = vma->vm_mm; bool first_uprobe; int ret; @@ -1162,9 +1162,11 @@ install_breakpoint(struct uprobe *uprobe, struct mm_struct *mm, return ret; } -static int -remove_breakpoint(struct uprobe *uprobe, struct mm_struct *mm, unsigned long vaddr) +static int remove_breakpoint(struct uprobe *uprobe, struct vm_area_struct *vma, + unsigned long vaddr) { + struct mm_struct *mm = vma->vm_mm; + set_bit(MMF_RECALC_UPROBES, &mm->flags); return set_orig_insn(&uprobe->arch, mm, vaddr); } @@ -1296,10 +1298,10 @@ register_for_each_vma(struct uprobe *uprobe, struct uprobe_consumer *new) if (is_register) { /* consult only the "caller", new consumer. */ if (consumer_filter(new, mm)) - err = install_breakpoint(uprobe, mm, vma, info->vaddr); + err = install_breakpoint(uprobe, vma, info->vaddr); } else if (test_bit(MMF_HAS_UPROBES, &mm->flags)) { if (!filter_chain(uprobe, mm)) - err |= remove_breakpoint(uprobe, mm, info->vaddr); + err |= remove_breakpoint(uprobe, vma, info->vaddr); } unlock: @@ -1472,7 +1474,7 @@ static int unapply_uprobe(struct uprobe *uprobe, struct mm_struct *mm) continue; vaddr = offset_to_vaddr(vma, uprobe->offset); - err |= remove_breakpoint(uprobe, mm, vaddr); + err |= remove_breakpoint(uprobe, vma, vaddr); } mmap_read_unlock(mm); @@ -1610,7 +1612,7 @@ int uprobe_mmap(struct vm_area_struct *vma) if (!fatal_signal_pending(current) && filter_chain(uprobe, vma->vm_mm)) { unsigned long vaddr = offset_to_vaddr(vma, uprobe->offset); - install_breakpoint(uprobe, vma->vm_mm, vma, vaddr); + install_breakpoint(uprobe, vma, vaddr); } put_uprobe(uprobe); } -- 2.48.1