From: David Rientjes <rientjes@google.com>
To: Randy Dunlap <rdunlap@infradead.org>
Cc: Andiry Xu <andiry@gmail.com>,
linux-kernel@vger.kernel.org, Andiry Xu <andiry.xu@gmail.com>,
Linux MM <linux-mm@kvack.org>
Subject: Re: [BUG] Description for memmap in kernel-parameters.txt is wrong
Date: Thu, 30 Jan 2014 14:17:28 -0800 (PST) [thread overview]
Message-ID: <alpine.DEB.2.02.1401301416030.15271@chino.kir.corp.google.com> (raw)
In-Reply-To: <52EAB56E.2030102@infradead.org>
On Thu, 30 Jan 2014, Randy Dunlap wrote:
> >>> Hi,
> >>>
> >>> In kernel-parameters.txt, there is following description:
> >>>
> >>> memmap=nn[KMG]$ss[KMG]
> >>> [KNL,ACPI] Mark specific memory as reserved.
> >>> Region of memory to be used, from ss to ss+nn.
> >>
> >> Should be:
> >> Region of memory to be reserved, from ss to ss+nn.
> >>
> >> but that doesn't help with the problem that you describe, does it?
> >>
> >
> > Actually it should be:
> > Region of memory to be reserved, from nn to nn+ss.
> >
> > That is, exchange nn and ss.
>
> Yes, I understand that that's what you are reporting. I just haven't yet
> worked out how the code manages to exchange those 2 values.
>
It doesn't, the documentation is correct as written and could be improved
by your suggestion of "Region of memory to be reserved, from ss to ss+nn."
I think Andiry probably is having a problem with his bootloader
interpreting the '$' incorrectly (or variable expansion if coming from the
shell) or interpreting the resulting user-defined e820 map incorrectly.
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next prev parent reply other threads:[~2014-01-30 22:17 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAOvWMLa334E8CYJLrHy6-0ZXBRneoMf-05v422SQw+dbGRubow@mail.gmail.com>
2014-01-30 19:25 ` Randy Dunlap
2014-01-30 19:33 ` Andiry Xu
2014-01-30 20:26 ` Randy Dunlap
2014-01-30 22:17 ` David Rientjes [this message]
2014-01-30 22:54 ` Randy Dunlap
2014-01-30 23:43 ` Andiry Xu
2014-01-30 23:49 ` Randy Dunlap
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