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Date:      Tue, 30 Jun 2020 15:38:59 +0200
From:      Alexander Leidinger <Alexander@leidinger.net>
To:        Edward Tomasz =?utf-8?b?TmFwaWVyYcWCYQ==?= <trasz@freebsd.org>
Cc:        emulation@freebsd.org
Subject:   Re: [Bug 230160] linuxulator doesn't implement madvise(MADV_DONTNEED) and any MADV_ flags with values >= 8 correctly
Message-ID:  <20200630153859.Horde.h7G-xufvRwckOE0FBCmjA7g@webmail.leidinger.net>
In-Reply-To: <ECA054B9-EEEC-4D46-8085-5ABA9B0BEBE4@FreeBSD.org>
References:  <20200630102834.Horde.gx36pdJxf2UwP6pq0GMUAVL@webmail.leidinger.net> <ECA054B9-EEEC-4D46-8085-5ABA9B0BEBE4@FreeBSD.org>

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Quoting Edward Tomasz Napiera=C5=82a <trasz@freebsd.org> (from Tue, 30 Jun=
=20=20
2020=2012:45:12 +0100):

>> On 30 Jun 2020, at 09:29, Alexander Leidinger=20=20
>>=20<Alexander@leidinger.net> wrote:
>>
>> =EF=BB=BFQuoting bugzilla-noreply@freebsd.org (from Thu, 25 Jun 2020=20=
=20
>>=2020:31:29 +0000):
>>
>>> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D230160
>>>
>>> --- Comment #12 from commit-hook@freebsd.org ---
>>> A commit references this bug:
>>>
>>> Author: markj
>>> Date: Thu Jun 25 20:30:31 UTC 2020
>>> New revision: 362631
>>> URL: https://svnweb.freebsd.org/changeset/base/362631
>>>
>>> Log:
>>>  Implement an approximation of Linux MADV_DONTNEED semantics.
>>
>> Hi,
>>
>> I've updated from r360373 to r362771. When I now try to start some=20=20
>>=20Steam games I get a new error message:
>> linux: pid 80394 (ThreadPoolSingl): possibly incorrect MADV_DONTNEED
>>
>> There are several different processes with this message. What needs=20=
=20
>>=20to be done to determine the "possibily incorrect" part?
>
> FWIW, I=E2=80=99m seeing those messages when running Python regression te=
sts=20=20
>=20(python3.6 -m test -vW -x test_socket), although it doesn=E2=80=99t see=
m to=20=20
>=20break anything.

There are two possibilities:
  1) There is no issue, and the message is not needed and it should be remo=
ved.
  2) There may be an issue, and it needs to be fixed. In this case it=20=20
would=20be interesting to know what the issue is, and maybe also to know=20=
=20
how=20to detect if a particular program runs into the issue.

Bye,
Alexander.

--=20
http://www.Leidinger.net=20Alexander@Leidinger.net: PGP 0x8F31830F9F2772BF
http://www.FreeBSD.org    netchild@FreeBSD.org  : PGP 0x8F31830F9F2772BF

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