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From: Suren Baghdasaryan <surenb@google.com>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Michal Hocko <mhocko@kernel.org>, Michal Hocko <mhocko@suse.com>,
	David Rientjes <rientjes@google.com>,
	Matthew Wilcox <willy@infradead.org>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Roman Gushchin <guro@fb.com>, Rik van Riel <riel@surriel.com>,
	Minchan Kim <minchan@kernel.org>,
	Christian Brauner <christian@brauner.io>,
	Tim Murray <timmurray@google.com>,
	linux-api@vger.kernel.org, linux-mm <linux-mm@kvack.org>,
	LKML <linux-kernel@vger.kernel.org>,
	kernel-team <kernel-team@android.com>
Subject: Re: [PATCH 2/2] mm/madvise: add process_madvise MADV_DONTNEER support
Date: Tue, 24 Nov 2020 08:42:28 -0800	[thread overview]
Message-ID: <CAJuCfpGdH0EzA9KjNBtKm-yywx4XbvpXXBskQ-pzExXYsTqTRg@mail.gmail.com> (raw)
In-Reply-To: <20201124134208.GA30125@redhat.com>

On Tue, Nov 24, 2020 at 5:42 AM Oleg Nesterov <oleg@redhat.com> wrote:
>
> On 11/23, Suren Baghdasaryan wrote:
> >
> > +     if (madvise_destructive(behavior)) {
> > +             /* Allow destructive madvise only on a dying processes */
> > +             if (!signal_group_exit(task->signal)) {
>
> signal_group_exit(task) is true if this task execs and kills other threads,
> see the comment above this helper.
>
> I think you need !(task->signal->flags & SIGNAL_GROUP_EXIT).

I see. Thanks for the feedback, Oleg. I'll test and fix it in the next version.

>
> Oleg.
>

  reply	other threads:[~2020-11-24 16:42 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-24  5:39 [PATCH 0/2] userspace memory reaping using process_madvise Suren Baghdasaryan
2020-11-24  5:39 ` [PATCH 1/2] mm/madvise: allow process_madvise operations on entire memory range Suren Baghdasaryan
2020-11-25 23:13   ` Minchan Kim
2020-11-25 23:23     ` Suren Baghdasaryan
2020-11-25 23:43       ` Minchan Kim
2020-11-30 19:01         ` Suren Baghdasaryan
2020-12-08  7:23           ` Suren Baghdasaryan
2020-12-11 20:27     ` Jann Horn
2020-12-11 23:01       ` Minchan Kim
2020-12-12  0:16         ` Jann Horn
2020-12-22 13:44       ` Christoph Hellwig
2020-12-22 17:48         ` Suren Baghdasaryan
2020-12-23  4:09           ` Suren Baghdasaryan
2020-12-23  7:57           ` Christoph Hellwig
2020-12-23 17:32             ` Suren Baghdasaryan
2020-11-24  5:39 ` [PATCH 2/2] mm/madvise: add process_madvise MADV_DONTNEER support Suren Baghdasaryan
2020-11-24 13:42   ` Oleg Nesterov
2020-11-24 16:42     ` Suren Baghdasaryan [this message]
2020-12-08 23:40   ` Jann Horn
2020-12-08 23:59     ` Suren Baghdasaryan

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