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=-8.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=ham 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 7E9DCC63793 for ; Thu, 22 Jul 2021 12:39:03 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2780F61278 for ; Thu, 22 Jul 2021 12:39:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2780F61278 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:43626 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m6Xyg-0005nk-9Z for qemu-devel@archiver.kernel.org; Thu, 22 Jul 2021 08:39:02 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50984) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m6Xwa-0002zY-H5 for qemu-devel@nongnu.org; Thu, 22 Jul 2021 08:36:52 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:51097) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m6XwX-0004RC-V1 for qemu-devel@nongnu.org; Thu, 22 Jul 2021 08:36:51 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1626957409; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=67KhO+RWmcoZZ9vDhr4KbLwNOua7cxusSO/6zFq+C0g=; b=AVFdr8ZTUiNGaDtb0nWYueWo9OZUh4G1+3qGD+YhIsFXF9ZIj+weyxBDJOYBofpzdjiwt4 5j01sGlrz8JCD2yksjIYLhL5NYlCCdRRAzr4oDZs4qikrrsCsux72BVTL1f5Zx6eDgLnme KSrLKSBsXvPoBv6CB8l/mX05BXp6/7A= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-392-AXHFotTBMhi_WdlpRvcp8A-1; Thu, 22 Jul 2021 08:36:46 -0400 X-MC-Unique: AXHFotTBMhi_WdlpRvcp8A-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 0941A107BEF5; Thu, 22 Jul 2021 12:36:46 +0000 (UTC) Received: from t480s.redhat.com (ovpn-112-116.ams2.redhat.com [10.36.112.116]) by smtp.corp.redhat.com (Postfix) with ESMTP id 446299329; Thu, 22 Jul 2021 12:36:36 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Subject: [PATCH v2 0/6] util/oslib-posix: Support MADV_POPULATE_WRITE for os_mem_prealloc() Date: Thu, 22 Jul 2021 14:36:29 +0200 Message-Id: <20210722123635.60608-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=david@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=david@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.472, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Pankaj Gupta , =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , Eduardo Habkost , "Michael S. Tsirkin" , David Hildenbrand , "Dr . David Alan Gilbert" , Igor Mammedov , Paolo Bonzini , Marek Kedzierski Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" #1 adds support for MADV_POPULATE_WRITE, #2 cleans up the code to avoid global variables and prepare for concurrency, #3 and #4 optimize thread handling, #5 makes os_mem_prealloc() safe to be called from multiple threads concurrently and #6 makes the SIGBUS handler coexist cleanly with the MCE SIGBUS handler under Linux. Details regarding MADV_POPULATE_WRITE can be found in introducing upstream Linux commit 4ca9b3859dac ("mm/madvise: introduce MADV_POPULATE_(READ|WRITE) to prefault page tables") and in the latest man page patch [1]. v1 -> v2: - "util/oslib-posix: Support MADV_POPULATE_WRITE for os_mem_prealloc()" -- Handle thread with no data to initialize -- Always set use_madv_populate_write properly -- Add comment regarding future fallocate() optimization - "util/oslib-posix: Don't create too many threads with small memory or little pages" -- Added - "util/oslib-posix: Avoid creating a single thread with MADV_POPULATE_WRITE" -- Added - "util/oslib-posix: Support concurrent os_mem_prealloc() invocation" -- Add missing g_once_init_leave() -- Move g_once_init_enter() to the place where it is actually needed - "util/oslib-posix: Forward SIGBUS to MCE handler under Linux" -- Added [1] https://lkml.kernel.org/r/20210712083917.16361-1-david@redhat.com Cc: Paolo Bonzini Cc: "Michael S. Tsirkin" Cc: Igor Mammedov Cc: Eduardo Habkost Cc: Dr. David Alan Gilbert Cc: Marek Kedzierski Cc: Pankaj Gupta Cc: Daniel P. Berrangé David Hildenbrand (6): util/oslib-posix: Support MADV_POPULATE_WRITE for os_mem_prealloc() util/oslib-posix: Introduce and use MemsetContext for touch_all_pages() util/oslib-posix: Don't create too many threads with small memory or little pages util/oslib-posix: Avoid creating a single thread with MADV_POPULATE_WRITE util/oslib-posix: Support concurrent os_mem_prealloc() invocation util/oslib-posix: Forward SIGBUS to MCE handler under Linux include/qemu/osdep.h | 7 ++ softmmu/cpus.c | 4 + util/oslib-posix.c | 220 +++++++++++++++++++++++++++++++++---------- 3 files changed, 181 insertions(+), 50 deletions(-) -- 2.31.1