linux-kernel - Re: memmap exclude boot command: how to check if it was indeed applied

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Message-ID: <51D26D9B.10301@free.fr>
Date:	Tue, 02 Jul 2013 08:05:15 +0200
From:	Eric Valette <eric.valette@...e.fr>
To:	linux-kernel@...r.kernel.org
CC:	eric.valette@...e.fr
Subject: Re: memmap exclude boot command: how to check if it was indeed applied

On 01/07/2013 20:40, Eric Valette wrote:
> Hi,
>
> After  hunting an unreproducible bug, I decided to run memtest86+ and
> found that only 8 byte of memory refuse to write the last two digit on
> the last 4GB memory stick.
>
> Memory is at 0x31db357558
>
> So I decided to add a memmap=4K@...00000031db35000 boot options in
> GRUB_CMDLINE_LINUX. But checking dmesg, I see no mention of this page
> being reserved.
>
> PS: CC me I'm not subscribed.

Analysing /sys/firmware/memmap files, I see no trace of buggy address 
exclusion. Any help?



--eric

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