From patchwork Sat Jan 21 10:23:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gregory Price X-Patchwork-Id: 646852 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ACDF8C52D11 for ; Sat, 21 Jan 2023 10:23:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229735AbjAUKXa (ORCPT ); Sat, 21 Jan 2023 05:23:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57966 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229697AbjAUKXZ (ORCPT ); Sat, 21 Jan 2023 05:23:25 -0500 Received: from mail-qt1-x842.google.com (mail-qt1-x842.google.com [IPv6:2607:f8b0:4864:20::842]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5006846D74; Sat, 21 Jan 2023 02:23:24 -0800 (PST) Received: by mail-qt1-x842.google.com with SMTP id h24so2186928qta.12; Sat, 21 Jan 2023 02:23:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ACObeGmvp/0Nnei4QCSvOb8xescxKyeceEFZIuDD2Fc=; b=MvgOXV4a9b8FFR7E4w2hZdj30Z7Om2ZS7Br9wR9ZecVYL0MBWrr3ZF/16KQF1f6vCZ w23Rx/4Tndk44FpOoUlbZBivV1wBCqWpzj+E6/MS/lywaipbEcUncSWuXXkBxfXYvcQy r7v2HiJnWour4ErFmxvtX0jggEevVsdIEgesXbK+G/e8eJB6yW72LWAK4TYJPwIweo01 AY2ShvdvDwyeJV+MbTk2zYJ+zTX2gEN3hXiM51a3D6E/yNUJxrBcrWWDcPUxdqxDC/HH r/sUIuu/8QJd1A2tDXOoq3ml6CWvY68DWhbDmB3WEUEA/gaPJWgHpy33kWGxCktu7VAw VWkQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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=ACObeGmvp/0Nnei4QCSvOb8xescxKyeceEFZIuDD2Fc=; b=cIh6Zb/FQyK+2yq7G9o37q7iGzBpPlIe8sVe7Gb5qVJUOSMbIBL9l0Pqz/la7+Bgh8 17ZMO5f+h02L/snYb8EkaggbelbTHwFNnG7gHrAMyi6yfmJj3W0W09EgZaFCw/WRdXNn j4VGEkKS5aJMKxeQfbV6U2SXBsk1pw04Gl6ncQ5mTjqk3zUBuj1BIoMGCvv3y/SuY8UP zU3RjbKoX277Bp9ODTZO8dn2j0gypqRn4ilhKa4NAzTeXSPsxACVzSs6nOs1DCOeHj8Q Q4c0oYAb5+Dp4mJSJ0P5fxIIXzOr7KXsanAf1f+0dS32Bv0Z6P5SJEmLrmUGGt7LXs2D 8ZQg== X-Gm-Message-State: AFqh2kqzRhdmixUTEqexrCuWq5d4S9S0chRPFQrKEeTxjs1rxQK9hIl2 foV1XoecOakw/P1CqcQHfsU+vDWzYsLm X-Google-Smtp-Source: AMrXdXsGXw83Ni91md2ApeibRl6pO81Y36UffPwEt335DPhivm/9X3h+XjnIgYI9k5wTzoGnIXhlXw== X-Received: by 2002:a05:622a:22a5:b0:3b4:a6ac:770c with SMTP id ay37-20020a05622a22a500b003b4a6ac770cmr25548530qtb.45.1674296603337; Sat, 21 Jan 2023 02:23:23 -0800 (PST) Received: from fedora.mshome.net (pool-173-79-56-208.washdc.fios.verizon.net. [173.79.56.208]) by smtp.gmail.com with ESMTPSA id y2-20020a05620a44c200b006e42a8e9f9bsm14128630qkp.121.2023.01.21.02.23.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 21 Jan 2023 02:23:23 -0800 (PST) From: Gregory Price X-Google-Original-From: Gregory Price To: linux-kernel@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, krisman@collabora.com, tglx@linutronix.de, luto@kernel.org, oleg@redhat.com, peterz@infradead.org, ebiederm@xmission.com, akpm@linux-foundation.org, adobriyan@gmail.com, corbet@lwn.net, shuah@kernel.org, Gregory Price Subject: [PATCH v4 2/3] fs/proc/array: Add Syscall User Dispatch to proc status Date: Sat, 21 Jan 2023 05:23:15 -0500 Message-Id: <20230121102316.331935-3-gregory.price@memverge.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230121102316.331935-1-gregory.price@memverge.com> References: <20230121102316.331935-1-gregory.price@memverge.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Report the value of test_syscall_work(SYSCALL_USER_DISPATCH)) in proc/status. This provides an indicator to userland checkpoint/resume software that it must manage special signal conditions (similar to SECCOMP) Signed-off-by: Gregory Price --- fs/proc/array.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/fs/proc/array.c b/fs/proc/array.c index 49283b8103c7..2275ac153c4c 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -428,6 +428,13 @@ 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_syscall_user_dispatch(struct seq_file *m, + struct task_struct *p) +{ + seq_put_decimal_ull(m, "\nSyscall_user_dispatch:\t", + test_syscall_work(SYSCALL_USER_DISPATCH)); +} + int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, struct pid *pid, struct task_struct *task) { @@ -451,6 +458,7 @@ int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, task_cpus_allowed(m, task); cpuset_task_status_allowed(m, task); task_context_switch_counts(m, task); + task_syscall_user_dispatch(m, task); return 0; }