From: Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: "Eric W. Biederman" <ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Linus Torvalds
<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Ingo Molnar <mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
Kees Cook <keescook-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
Roland McGrath <roland-/Z5OmTQCD9xF6kxbq+BtvQ@public.gmane.org>,
Al Viro <viro-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>,
David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
"Michael Kerrisk (man-pages)"
<mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH 08/26] exit: Make the runqueue rcu safe
Date: Wed, 7 Jun 2017 15:16:50 +0200 [thread overview]
Message-ID: <20170607131650.GA23434@redhat.com> (raw)
In-Reply-To: <20170606190338.28347-8-ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
On 06/06, Eric W. Biederman wrote:
>
> Add a rcu_usage to task_struct and use it to reuse the delayed rcu put
> logic from release_task in finish_task_switch.
I didn't really read this patch yet, but it first glance it should work and
you can also remove the ->exit_state check/limitation in rcuwait_wait_event().
Oleg.
WARNING: multiple messages have this Message-ID (diff)
From: Oleg Nesterov <oleg@redhat.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Ingo Molnar <mingo@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Kees Cook <keescook@chromium.org>,
Roland McGrath <roland@hack.frob.com>,
Al Viro <viro@ZenIV.linux.org.uk>,
David Howells <dhowells@redhat.com>,
"Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>
Subject: Re: [PATCH 08/26] exit: Make the runqueue rcu safe
Date: Wed, 7 Jun 2017 15:16:50 +0200 [thread overview]
Message-ID: <20170607131650.GA23434@redhat.com> (raw)
In-Reply-To: <20170606190338.28347-8-ebiederm@xmission.com>
On 06/06, Eric W. Biederman wrote:
>
> Add a rcu_usage to task_struct and use it to reuse the delayed rcu put
> logic from release_task in finish_task_switch.
I didn't really read this patch yet, but it first glance it should work and
you can also remove the ->exit_state check/limitation in rcuwait_wait_event().
Oleg.
next prev parent reply other threads:[~2017-06-07 13:16 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-06 19:01 [PATCH 00/26] Fixing wait, exit, ptrace, exec, and CLONE_THREAD Eric W. Biederman
2017-06-06 19:01 ` Eric W. Biederman
2017-06-06 19:03 ` [PATCH 01/26] alpha: Remove unused TASK_GROUP_LEADER Eric W. Biederman
2017-06-06 19:03 ` [PATCH 02/26] cgroup: Don't open code tasklist_empty() Eric W. Biederman
2017-06-06 19:03 ` [PATCH 03/26] signal: Do not perform permission checks when sending pdeath_signal Eric W. Biederman
[not found] ` <20170606190338.28347-3-ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-06-06 20:01 ` Linus Torvalds
2017-06-06 20:01 ` Linus Torvalds
[not found] ` <CA+55aFya7CgNozFrhQ9qk40UhZAD8SMva1+Y1vQ0YUEbpUpQUA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-06-07 11:23 ` Eric W. Biederman
2017-06-07 11:23 ` Eric W. Biederman
2017-06-06 21:42 ` Richard Weinberger
2017-06-06 21:42 ` Richard Weinberger
2017-06-06 19:03 ` [PATCH 04/26] signal: Make group_send_sig_info static Eric W. Biederman
2017-06-06 19:03 ` [PATCH 06/26] rlimit: Remove unnecessary grab of tasklist_lock Eric W. Biederman
2017-06-07 12:36 ` Oleg Nesterov
[not found] ` <20170607123657.GA22199-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-06-07 14:08 ` Eric W. Biederman
2017-06-07 14:08 ` Eric W. Biederman
2017-06-06 19:03 ` [PATCH 07/26] pidns: Improve the error handling in alloc_pid Eric W. Biederman
2017-06-06 19:03 ` [PATCH 08/26] exit: Make the runqueue rcu safe Eric W. Biederman
[not found] ` <20170606190338.28347-8-ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-06-07 13:16 ` Oleg Nesterov [this message]
2017-06-07 13:16 ` Oleg Nesterov
2017-06-06 19:03 ` [PATCH 09/26] signal: Don't allow sending SIGKILL or SIGSTOP to init Eric W. Biederman
2017-06-06 19:03 ` [PATCH 10/26] ptrace: Simplify ptrace_detach & exit_ptrace Eric W. Biederman
2017-06-06 19:03 ` [PATCH 11/26] wait: Properly implement __WCLONE handling in the presence of exec and ptrace Eric W. Biederman
2017-06-06 19:03 ` [PATCH 12/26] wait: Directly test for the two cases where wait_task_zombie is called Eric W. Biederman
2017-06-06 19:03 ` [PATCH 17/26] exit: Rework the exit states for ptracees Eric W. Biederman
[not found] ` <20170606190338.28347-1-ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-06-06 19:03 ` [PATCH 05/26] exit: Remove the pointless clearing of SIGPENDING in __exit_signal Eric W. Biederman
2017-06-06 19:03 ` Eric W. Biederman
2017-06-06 19:03 ` [PATCH 13/26] wait: Remove unused delay_group_leader Eric W. Biederman
2017-06-06 19:03 ` Eric W. Biederman
2017-06-06 19:03 ` [PATCH 14/26] wait: Move changing of ptrace from wait_consider_task into wait_task_stopped Eric W. Biederman
2017-06-06 19:03 ` Eric W. Biederman
2017-06-06 19:03 ` [PATCH 15/26] wait: Don't delay !ptrace_reparented leaders Eric W. Biederman
2017-06-06 19:03 ` Eric W. Biederman
2017-06-06 19:03 ` [PATCH 16/26] exit: Fix reporting a ptraced !reparented leader has exited Eric W. Biederman
2017-06-06 19:03 ` Eric W. Biederman
2017-06-06 19:03 ` [PATCH 18/26] wait: Fix WSTOPPED on a ptraced child Eric W. Biederman
2017-06-06 19:03 ` Eric W. Biederman
2017-06-06 19:03 ` [PATCH 19/26] wait: Simpler code for clearing notask_error in wait_consider_task Eric W. Biederman
2017-06-06 19:03 ` Eric W. Biederman
2017-06-06 19:03 ` [PATCH 20/26] wait: Don't pass the list to wait_consider_task Eric W. Biederman
2017-06-06 19:03 ` Eric W. Biederman
2017-06-06 19:03 ` [PATCH 22/26] exit: Fix auto-wait of ptraced children Eric W. Biederman
2017-06-06 19:03 ` Eric W. Biederman
2017-06-06 19:03 ` [PATCH 23/26] signal: Fix SIGCONT before group stop completes Eric W. Biederman
2017-06-06 19:03 ` Eric W. Biederman
2017-06-06 19:03 ` [PATCH 24/26] signal: In ptrace_stop improve identical signal detection Eric W. Biederman
2017-06-06 19:03 ` Eric W. Biederman
2017-06-06 19:03 ` [PATCH 21/26] wait: Optmize waitpid Eric W. Biederman
2017-06-06 19:03 ` [PATCH 25/26] signal: In ptrace_stop use CLD_TRAPPED in all ptrace signals Eric W. Biederman
2017-06-06 19:03 ` [PATCH 26/26] pidns: Ensure zap_pid_ns_processes always terminates Eric W. Biederman
[not found] ` <877f0pym71.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-06-06 19:40 ` [PATCH 00/26] Fixing wait, exit, ptrace, exec, and CLONE_THREAD Aleksa Sarai
2017-06-06 19:40 ` Aleksa Sarai
[not found] ` <dd16b1bb-e99e-69f2-72f4-1be4cb24d18d-l3A5Bk7waGM@public.gmane.org>
2017-06-07 11:36 ` Eric W. Biederman
2017-06-07 11:36 ` Eric W. Biederman
[not found] ` <87ink8vxkf.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-06-07 12:21 ` Aleksa Sarai
2017-06-07 12:21 ` Aleksa Sarai
2017-06-07 11:36 ` Eric W. Biederman
2017-06-06 20:07 ` Linus Torvalds
2017-06-06 20:07 ` Linus Torvalds
[not found] ` <CA+55aFze5rR+rGcG6kt=8PtfgAcs02jqQ7Gm-1=1MzkbA7_nqA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-06-07 15:59 ` Eric W. Biederman
2017-06-07 15:59 ` Eric W. Biederman
2017-06-07 15:59 ` Eric W. Biederman
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