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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" This patchset adds a couple new options to kernel_clone_args for IO thread like/related users. Instead of adding new fields to kernel_clone_args for each option, this moves us to a flags based approach by first converting io_thread. Signed-off-by: Mike Christie Suggested-by: Christian Brauner Acked-by: Christian Brauner Reviewed-by: Christoph Hellwig --- include/linux/sched/task.h | 4 +++- kernel/fork.c | 4 ++-- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h index 058d7f371e25..65d5ec3a8a04 100644 --- a/include/linux/sched/task.h +++ b/include/linux/sched/task.h @@ -18,8 +18,11 @@ struct css_set; /* All the bits taken by the old clone syscall. */ #define CLONE_LEGACY_FLAGS 0xffffffffULL +#define USER_WORKER_IO BIT(0) + struct kernel_clone_args { u64 flags; + u32 worker_flags; int __user *pidfd; int __user *child_tid; int __user *parent_tid; @@ -31,7 +34,6 @@ struct kernel_clone_args { /* Number of elements in *set_tid */ size_t set_tid_size; int cgroup; - int io_thread; struct cgroup *cgrp; struct css_set *cset; }; diff --git a/kernel/fork.c b/kernel/fork.c index 3244cc56b697..6effd839d566 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -2023,7 +2023,7 @@ static __latent_entropy struct task_struct *copy_process( p = dup_task_struct(current, node); if (!p) goto fork_out; - if (args->io_thread) { + if (args->worker_flags & USER_WORKER_IO) { /* * Mark us an IO worker, and block any signal that isn't * fatal or STOP @@ -2524,7 +2524,7 @@ struct task_struct *create_io_thread(int (*fn)(void *), void *arg, int node) .exit_signal = (lower_32_bits(flags) & CSIGNAL), .stack = (unsigned long)fn, .stack_size = (unsigned long)arg, - .io_thread = 1, + .worker_flags = USER_WORKER_IO, }; return copy_process(NULL, 0, node, &args); -- 2.25.1 _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 27D81C433FE for ; Mon, 29 Nov 2021 19:49:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1379117AbhK2TxF (ORCPT ); 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b=ET/E0MgApx4cD9Vg6JnUq6pGOfHiTX8Dkz0wKs8W06T1VfVadTj66IbOfjXGm4nYPWS5PU2QM6CNY6GrIhaUBOgYaDA6ewML/6DIFEHwqx2Rsfn3VVPOaDBlr5b6DY6ETAHda+5ADhnOvmdoaAM9LhnYFIvNLckokrgTNYJ+pxc= Received: from DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) by DM5PR10MB1307.namprd10.prod.outlook.com (2603:10b6:3:e::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4734.21; Mon, 29 Nov 2021 19:47:16 +0000 Received: from DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::601a:d0f6:b9db:f041]) by DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::601a:d0f6:b9db:f041%11]) with mapi id 15.20.4734.024; Mon, 29 Nov 2021 19:47:16 +0000 From: Mike Christie To: geert@linux-m68k.org, vverma@digitalocean.com, hdanton@sina.com, hch@infradead.org, stefanha@redhat.com, jasowang@redhat.com, mst@redhat.com, sgarzare@redhat.com, virtualization@lists.linux-foundation.org, christian.brauner@ubuntu.com, axboe@kernel.dk, linux-kernel@vger.kernel.org Cc: Mike Christie , Christoph Hellwig Subject: [PATCH V6 01/10] fork: Make IO worker options flag based Date: Mon, 29 Nov 2021 13:46:58 -0600 Message-Id: <20211129194707.5863-2-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211129194707.5863-1-michael.christie@oracle.com> References: <20211129194707.5863-1-michael.christie@oracle.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: CH0PR03CA0086.namprd03.prod.outlook.com (2603:10b6:610:cc::31) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 Received: from localhost.localdomain (73.88.28.6) by CH0PR03CA0086.namprd03.prod.outlook.com (2603:10b6:610:cc::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4734.22 via Frontend Transport; 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Instead of adding new fields to kernel_clone_args for each option, this moves us to a flags based approach by first converting io_thread. Signed-off-by: Mike Christie Suggested-by: Christian Brauner Acked-by: Christian Brauner Reviewed-by: Christoph Hellwig --- include/linux/sched/task.h | 4 +++- kernel/fork.c | 4 ++-- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h index 058d7f371e25..65d5ec3a8a04 100644 --- a/include/linux/sched/task.h +++ b/include/linux/sched/task.h @@ -18,8 +18,11 @@ struct css_set; /* All the bits taken by the old clone syscall. */ #define CLONE_LEGACY_FLAGS 0xffffffffULL +#define USER_WORKER_IO BIT(0) + struct kernel_clone_args { u64 flags; + u32 worker_flags; int __user *pidfd; int __user *child_tid; int __user *parent_tid; @@ -31,7 +34,6 @@ struct kernel_clone_args { /* Number of elements in *set_tid */ size_t set_tid_size; int cgroup; - int io_thread; struct cgroup *cgrp; struct css_set *cset; }; diff --git a/kernel/fork.c b/kernel/fork.c index 3244cc56b697..6effd839d566 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -2023,7 +2023,7 @@ static __latent_entropy struct task_struct *copy_process( p = dup_task_struct(current, node); if (!p) goto fork_out; - if (args->io_thread) { + if (args->worker_flags & USER_WORKER_IO) { /* * Mark us an IO worker, and block any signal that isn't * fatal or STOP @@ -2524,7 +2524,7 @@ struct task_struct *create_io_thread(int (*fn)(void *), void *arg, int node) .exit_signal = (lower_32_bits(flags) & CSIGNAL), .stack = (unsigned long)fn, .stack_size = (unsigned long)arg, - .io_thread = 1, + .worker_flags = USER_WORKER_IO, }; return copy_process(NULL, 0, node, &args); -- 2.25.1