linux-kernel - Re: [PATCH] n_tty: use kmalloc() instead of vmalloc() to avoid crash on armada-xp

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Message-ID: <550187A4.8010704@hurleysoftware.com>
Date:	Thu, 12 Mar 2015 08:33:40 -0400
From:	Peter Hurley <peter@...leysoftware.com>
To:	Stas Sergeev <stsp@...t.ru>,
	Russell King - ARM Linux <linux@....linux.org.uk>
CC:	Catalin Marinas <catalin.marinas@....com>,
	Linux kernel <linux-kernel@...r.kernel.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] n_tty: use kmalloc() instead of vmalloc() to avoid crash
 on armada-xp

On 03/11/2015 10:24 AM, Stas Sergeev wrote:
> However, while testing, I've suddenly got another crash happened
> a bit earlier than the previous one used to happen: (OOM? How??)
> ---
> [    0.000000] Booting Linux on physical CPU 0x0
> [    0.000000] Linux version 4.0.0-rc2-00137-gb672c98-dirty
> (root@...t-010-117) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) )
> #2 SMP 5
> [    0.000000] CPU: ARMv7 Processor [562f5842] revision 2 (ARMv7),
> cr=10c5387d
> [    0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction
> cache
> [    0.000000] Machine model: Marvell Armada XP Development Board
> DB-MV784MP-GP
> [    0.000000] Ignoring memory block 0x100000000 - 0x200000000

Once you patch your bootloader, you'll want to configure your kernel
for CONFIG_ARM_LPAE=y to enable the high 4GB of memory you have, as
it's being ignored in this config right now (as shown above and in
the oom message below).

> [    7.055570] Mem-info:
[...]
> [    7.314368] 983040 pages of RAM

Regards,
Peter Hurley
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