[Bug 230160] linuxulator doesn't implement madvise(MADV_DONTNEED) and any MADV_ flags with values >= 8 correctly

[Edward Tomasz Napierała]

> On 30 Jun 2020, at 09:29, Alexander Leidinger <Alexander at leidinger.net> wrote:
> 
> Quoting bugzilla-noreply at freebsd.org (from Thu, 25 Jun 2020 20:31:29 +0000):
> 
>> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230160
>> 
>> --- Comment #12 from commit-hook at 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 Steam 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 to be done to determine the "possibily incorrect" part?

FWIW, I’m seeing those messages when running Python regression tests (python3.6 -m test -vW -x test_socket), although it doesn’t seem to break anything.