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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 E8FC0C433E3 for ; Mon, 22 Mar 2021 22:09:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BB414619AA for ; Mon, 22 Mar 2021 22:09:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230167AbhCVWJI (ORCPT ); Mon, 22 Mar 2021 18:09:08 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:42320 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230258AbhCVWI6 (ORCPT ); Mon, 22 Mar 2021 18:08:58 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1616450938; 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=BRu817/U099Z69O52DlP7850OjT0QzngDMzivy9vMy0=; b=Xj/pAn5Ng3jbI3R15QwYU28Bau3W/QuWhCjpTm/u8oMT94jqa2+oPEhGg5rwF5E5ycbaXX yWKZPvxjg55KsOvhYtlCEUrboGFIEnOXiHTgKsRJ0Wpi2LL7g8RM0AhJ35WHjh8iKOe/EP 5SlC1i2zSKg1JQYb2yUl7PtCP5InTi8= Received: from mail-qv1-f71.google.com (mail-qv1-f71.google.com [209.85.219.71]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-144-HHi8yUsiO-OL4Hl2PZcncg-1; Mon, 22 Mar 2021 18:08:56 -0400 X-MC-Unique: HHi8yUsiO-OL4Hl2PZcncg-1 Received: by mail-qv1-f71.google.com with SMTP id h12so373020qvm.9 for ; Mon, 22 Mar 2021 15:08:56 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=BRu817/U099Z69O52DlP7850OjT0QzngDMzivy9vMy0=; b=qwvCmfXoUUqeKudE+lLBgMpqtzuayhiMQFa64S7nWyamWqJVI9wgouRyHl78LFACkU pJkUwdhrPUyR0RxFPcn+CzoEygFRCpgrvpmOKypha6dTxpB9MXmnilfxp92FLuh8wcK1 SOD6ueX0/iDI216uQW7Csy1U6hNK/ctEfIgxpdB6gs9nTlZNMrtVCx6xbCs8hsVYLw44 CSf9mg5dqFb0P69AVmsDAhqnqkLoTOVRtQesVHmlLMyjr2v4T4OoYLZq57cDBDN+AAYp H5N/lH42TGyrLWz6a7lLB7UQbqlgPLWticPGzOsWbqrjpSemoXhKnLs/KjZL71xztWZp yqPg== X-Gm-Message-State: AOAM5313WSbQY+YZhqvxTNYlPHeOU8Ffx577CbGcFxFxMFym1wtOo+AG AVVpFsRyMS7TsVwFpNLsJ5FlyzjdIjnJYWNnj+NtEPLgJHLcp7645A1bS/cwEzWtqD7q2prbqFU MLhVxEaY87QVCxFg1/7NjwhsIgAH4DFRRQU1F89ecoLNSBQbjhSuq/inBgtfajA6urvtKYQ== X-Received: by 2002:a0c:8365:: with SMTP id j92mr1838983qva.19.1616450935947; Mon, 22 Mar 2021 15:08:55 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwCbjzyxBUp80nxRyYOsjXe3EhMn6ViF263Myc1EobEUgW3DpX04+Jg+RKXYZDbze77kuVtcQ== X-Received: by 2002:a0c:8365:: with SMTP id j92mr1838955qva.19.1616450935685; Mon, 22 Mar 2021 15:08:55 -0700 (PDT) Received: from xz-x1.redhat.com (bras-base-toroon474qw-grc-82-174-91-135-175.dsl.bell.ca. [174.91.135.175]) by smtp.gmail.com with ESMTPSA id x1sm9627850qtr.97.2021.03.22.15.08.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Mar 2021 15:08:54 -0700 (PDT) From: Peter Xu To: linux-man@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Andrea Arcangeli , Mike Rapoport , Axel Rasmussen , Alejandro Colomar , peterx@redhat.com, Michael Kerrisk , Nadav Amit , Andrew Morton Subject: [PATCH v4 3/4] ioctl_userfaultfd.2: Add UFFD_FEATURE_THREAD_ID docs Date: Mon, 22 Mar 2021 18:08:47 -0400 Message-Id: <20210322220848.52162-4-peterx@redhat.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210322220848.52162-1-peterx@redhat.com> References: <20210322220848.52162-1-peterx@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org UFFD_FEATURE_THREAD_ID is supported in Linux 4.14. Signed-off-by: Peter Xu --- man2/ioctl_userfaultfd.2 | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/man2/ioctl_userfaultfd.2 b/man2/ioctl_userfaultfd.2 index 47ae5f473..d4a8375b8 100644 --- a/man2/ioctl_userfaultfd.2 +++ b/man2/ioctl_userfaultfd.2 @@ -208,6 +208,11 @@ signal will be sent to the faulting process. Applications using this feature will not require the use of a userfaultfd monitor for processing memory accesses to the regions registered with userfaultfd. +.TP +.BR UFFD_FEATURE_THREAD_ID " (since Linux 4.14)" +If this feature bit is set, +.I uffd_msg.pagefault.feat.ptid +will be set to the faulted thread ID for each page fault message. .PP The returned .I ioctls -- 2.26.2