linux-kernel - kernel memory allocation limit

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Message-ID: <FF584854D6FFE547AB2F7515A798AC3A0AF9C98A66@venus.imagineil.tv>
Date:	Thu, 10 Dec 2009 18:09:17 +0200
From:	Jacob Avraham <jacob@...ginecommunications.com>
To:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: kernel memory allocation limit

Hi,

I'm trying to allocation in my module a bunch of contiguous memory segments using __get_free_pages(), 128k at a time, from the NORMAL zone on a x86-64 machine with 24G ram. Kernel is 2.6.18 from CentOS5.3. I ran into a hard limit of 2G.
Where is this limitation coming from and is it changeable?

Thanks,
Jacob Avraham

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