From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paul Boddie <paul@boddie.org.uk>
Subject: Re: Bootstrapping on a new platform
Date: Tue, 12 Dec 2017 17:29:22 +0100
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	<201712111736.12484.paul@boddie.org.uk> <87indcorjg.fsf@gnu.org>
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To: Ludovic =?utf-8?q?Court=C3=A8s?= <ludo@gnu.org>
Cc: help-guix@gnu.org

On Tuesday 12. December 2017 17.10.59 Ludovic Court=C3=A8s wrote:
> Paul Boddie <paul@boddie.org.uk> skribis:
> >=20
> > Sorry for the noise, but I guess this is what happens when someone tries
> > to do things the hard way. Thanks for identifying the cause of the
> > problem!
>=20
> Great that you found out!

I'll keep you posted about the end result. I managed to encounter a problem=
=20
with User Mode Linux that is known:

do_syscall_stub : ret =3D -12, offset =3D 1052680, data =3D 09b80008
do_syscall_stub: syscall 192 failed, return value =3D 0xfffffff4, expected=
=20
return value =3D 0x1cff8000
    syscall parameters: 0x1cff8000 0x1000 0x7 0x11 0x3 0xd464
=46ailed to flush page for address 0x1cff8000

Apparently, this scary error, which causes the offending process to termina=
te,=20
is the result of an insufficiently large value in /proc/sys/vm/max_map_coun=
t.=20
Since I don't have huge amounts of memory by modern standards, I'm used to=
=20
occasional problems with UML, and I guess that some of the build tasks are=
=20
quite demanding.

Hopefully, I'll be able to complete the build of GCC 5.4, which is the thin=
g=20
that repeatably causes this. Then we'll see what happens.

Thanks once again!

Paul