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Date:      Mon, 18 Apr 2016 19:59:51 -0700
From:      Devin Teske <dteske@freebsd.org>
To:        Allan Jude <allanjude@FreeBSD.org>
Cc:        Pedro Giffuni <pfg@FreeBSD.org>, Adrian Chadd <adrian.chadd@gmail.com>, "src-committers@freebsd.org" <src-committers@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>, Devin Teske <dteske@FreeBSD.org>
Subject:   Re: svn commit: r298230 - in head: lib/libstand sys/boot/common sys/boot/efi/libefi sys/boot/efi/loader sys/boot/i386/libfirewire sys/boot/i386/libi386 sys/boot/i386/loader sys/boot/mips/beri/loader sy...
Message-ID:  <F9B9BE55-60CE-4592-9897-11F3567F8174@freebsd.org>
In-Reply-To: <57158BF3.3060605@freebsd.org>
References:  <201604182309.u3IN9MC6047480@repo.freebsd.org> <CAJ-Vmo=WX8xwnuvbPJMib3BMuVKjQMkKt1qXkx=TPH5wZYPM1A@mail.gmail.com> <57157108.6090500@freebsd.org> <84FB3FCC-4779-4ED1-B0A6-142C90D08EEF@freebsd.org> <5715848F.7020805@FreeBSD.org> <CE15B9D5-C830-427B-9656-FFCBDDD25B9C@freebsd.org> <57158BF3.3060605@freebsd.org>

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> On Apr 18, 2016, at 6:37 PM, Allan Jude <allanjude@FreeBSD.org> wrote:
>=20
> On 2016-04-18 21:32, Devin Teske wrote:
>>=20
>>> On Apr 18, 2016, at 6:06 PM, Pedro Giffuni <pfg@FreeBSD.org> wrote:
>>>=20
>>>=20
>>>=20
>>> On 04/18/16 19:30, Devin Teske wrote:
>>>>=20
>>>>=20
>>>>> On Apr 18, 2016, at 4:43 PM, Allan Jude <allanjude@FreeBSD.org
>>>>> <mailto:allanjude@FreeBSD.org>> wrote:
>>>>>=20
>>>>> On 2016-04-18 19:36, Adrian Chadd wrote:
>>>>>> Someone pointed out how this bloats out memory requirement in =
loader.
>>>>>>=20
>>>>>> Did anyone check that?
>>>>>>=20
>>>>>> -adrian
>>>>>>=20
>>>>>=20
>>>>> I tested down to 128mb of ram in QEMU, booted from the installer =
ISO,
>>>>> did the install, and booted the installed system without issue.
>>>>=20
>>>> Hmm. Would be nice if we could claim success under 64MB too.
>>>> If you get the chance.
>>>> How low can it go?
>>>=20
>>> FWIW, The code review comments state:
>>>=20
>>> <quote>
>>>=20
>>> BTW: as mentioned in very beginning of this project, I'm reserving =
fairly large chunk of memory (64MB) for loader and using same amount for =
both BIOS/UEFI variants, default in freebsd is 3MB, eventually this =
should be reviewed, but currently it will affect very small setups.
>>>=20
>>> </quote>
>>>=20
>>> I still think it's pretty cool, thanks to everyone involved.
>>>=20
>>=20
>> Does anyone know what the original memory reservation amount was =
before it was upped to 64MB?
>>=20
>=20
> It was 3MB
>=20

Next [possibly] dumb question(s).

Is it easily tunable?
If not, why not?
What happens when we want to bump it further in the future?
--=20
Devin=



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