From: Oleg Nesterov <oleg@redhat.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>,
linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org,
Alexander.Deucher@amd.com, Christian.Koenig@amd.com,
David.Panariti@amd.com, akpm@linux-foundation.org
Subject: Re: [PATCH 2/3] drm/scheduler: Don't call wait_event_killable for signaled process.
Date: Wed, 25 Apr 2018 15:55:52 +0200 [thread overview]
Message-ID: <20180425135552.GD7592@redhat.com> (raw)
In-Reply-To: <877eowa5qh.fsf@xmission.com>
On 04/24, Eric W. Biederman wrote:
>
> Let me respectfully suggest that the wait_event_killable on that code
> path is wrong.
I tend to agree even if I don't know this code.
But if it can be called from f_op->release() then any usage of "current" or
signals looks suspicious. Simply because "current" can be completely irrelevant
task which does the last fput(), say, cat /proc/pid/fdinfo/... or even a kernel
thread.
Oleg.
next prev parent reply other threads:[~2018-04-25 13:56 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-24 15:30 Avoid uninterruptible sleep during process exit Andrey Grodzovsky
2018-04-24 15:30 ` [PATCH 1/3] signals: Allow generation of SIGKILL to exiting task Andrey Grodzovsky
2018-04-24 16:10 ` Eric W. Biederman
2018-04-24 16:42 ` Eric W. Biederman
2018-04-24 16:51 ` Andrey Grodzovsky
2018-04-24 17:29 ` Eric W. Biederman
2018-04-25 13:13 ` Oleg Nesterov
2018-04-24 15:30 ` [PATCH 2/3] drm/scheduler: Don't call wait_event_killable for signaled process Andrey Grodzovsky
2018-04-24 15:46 ` Michel Dänzer
2018-04-24 15:51 ` Andrey Grodzovsky
2018-04-24 15:52 ` Andrey Grodzovsky
2018-04-24 19:44 ` Daniel Vetter
2018-04-24 21:00 ` Eric W. Biederman
2018-04-24 21:02 ` Andrey Grodzovsky
2018-04-24 21:21 ` Eric W. Biederman
2018-04-24 21:37 ` Andrey Grodzovsky
2018-04-24 22:11 ` Eric W. Biederman
2018-04-25 7:14 ` Daniel Vetter
2018-04-25 13:08 ` Andrey Grodzovsky
2018-04-25 15:29 ` Eric W. Biederman
[not found] ` <311660b9-9e46-b960-3088-06e16ac3838d@amd.com>
2018-04-25 16:31 ` Eric W. Biederman
2018-04-24 21:40 ` Daniel Vetter
2018-04-25 13:22 ` Oleg Nesterov
2018-04-25 13:36 ` Daniel Vetter
2018-04-25 14:18 ` Oleg Nesterov
2018-04-25 13:43 ` Andrey Grodzovsky
2018-04-24 16:23 ` Eric W. Biederman
2018-04-24 16:43 ` Andrey Grodzovsky
2018-04-24 17:12 ` Eric W. Biederman
2018-04-25 13:55 ` Oleg Nesterov [this message]
2018-04-25 14:21 ` Andrey Grodzovsky
2018-04-25 17:17 ` Oleg Nesterov
2018-04-25 18:40 ` Andrey Grodzovsky
2018-04-26 0:01 ` Eric W. Biederman
2018-04-26 12:34 ` Andrey Grodzovsky
2018-04-26 12:52 ` Andrey Grodzovsky
2018-04-26 15:57 ` Eric W. Biederman
2018-04-26 20:43 ` Andrey Grodzovsky
2018-04-30 12:08 ` Christian König
2018-04-30 14:32 ` Andrey Grodzovsky
2018-04-30 15:25 ` Christian König
2018-04-30 16:00 ` Oleg Nesterov
2018-04-30 16:10 ` Andrey Grodzovsky
2018-04-30 18:29 ` Christian König
2018-04-30 19:28 ` Andrey Grodzovsky
2018-05-02 11:48 ` Christian König
2018-05-01 14:35 ` Oleg Nesterov
2018-05-23 15:08 ` Andrey Grodzovsky
2018-04-30 15:29 ` Oleg Nesterov
2018-04-30 16:25 ` Eric W. Biederman
2018-04-30 17:18 ` Andrey Grodzovsky
2018-04-25 13:05 ` Oleg Nesterov
2018-04-24 15:30 ` [PATCH 3/3] drm/amdgpu: Switch to interrupted wait to recover from ring hang Andrey Grodzovsky
2018-04-24 15:52 ` Panariti, David
2018-04-24 15:58 ` Andrey Grodzovsky
2018-04-24 16:20 ` Panariti, David
2018-04-24 16:30 ` Eric W. Biederman
2018-04-25 17:17 ` Andrey Grodzovsky
2018-04-25 20:55 ` Eric W. Biederman
2018-04-26 12:28 ` Andrey Grodzovsky
2018-04-24 16:14 ` Eric W. Biederman
2018-04-24 16:38 ` Andrey Grodzovsky
2018-04-30 11:34 ` Christian König
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