From: David Hildenbrand <david@redhat.com>
To: Karim Manaouil <kmanaouil.dev@gmail.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: Debug: mm: meminfo reports 222GiB of AnonPages but sum of RSS in ps is barely 400MiB
Date: Wed, 17 Jan 2024 16:53:44 +0100 [thread overview]
Message-ID: <0998c7cc-8480-4e4e-8c29-4e9718354cc3@redhat.com> (raw)
In-Reply-To: <CA+uifjNw0W=EaUHbhq_CN8uOj0H_Yfu9JKSL1=EH6dnYkN3-ng@mail.gmail.com>
On 17.01.24 16:50, Karim Manaouil wrote:
> On Wed, Jan 17, 2024 at 2:15 PM David Hildenbrand <david@redhat.com> wrote:
>
>> Maybe we have something call mmget(mm) but never mmput(mm)? Are you
>> running any OOT drivers or "special" hw?
>
> That's exactly the reason! I was writing some code to count the number
> of empty page tables in the system
> at any given point in time. I called get_task_mm(), but I forgot to
> call mmput() after that, and thus
> the memory was never released.
If you want to work on reclaiming empty page tables, please talk to me :D
--
Cheers,
David / dhildenb
prev parent reply other threads:[~2024-01-17 15:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CA+uifjNcZbb6=9-o9_cWCMyXRFZPHhyvWS2mys-YhfP9gaJ75w@mail.gmail.com>
2024-01-17 14:15 ` David Hildenbrand
[not found] ` <CA+uifjNw0W=EaUHbhq_CN8uOj0H_Yfu9JKSL1=EH6dnYkN3-ng@mail.gmail.com>
2024-01-17 15:53 ` David Hildenbrand [this message]
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