From: "Tony Luck" <tony.luck@intel.com>
To: "Zou Nan hai" <nanhai.zou@intel.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
"Andrew Morton" <akpm@osdl.org>, "Andi Kleen" <ak@suse.de>,
"Venkatesh Pallipadi" <venkatesh.pallipadi@intel.com>
Subject: Re: [Patch] Move swiotlb_init early on X86_64
Date: Wed, 1 Mar 2006 20:15:12 -0800 [thread overview]
Message-ID: <12c511ca0603012015g7a5bfa8dw4295c59f5dace4f9@mail.gmail.com> (raw)
In-Reply-To: <1141175458.2642.78.camel@linux-znh>
On 01 Mar 2006 09:10:58 +0800, Zou Nan hai <nanhai.zou@intel.com> wrote:
> on X86_64, swiotlb buffer is allocated in mem_init, after memmap and vfs cache allocation.
>
> On platforms with huge physical memory,
> large memmap and vfs cache may eat up all usable system memory
> under 4G.
>
> Move swiotlb_init early before memmap is allocated can
> solve this issue.
Shouldn't memmap be allocated from memory above 4G (if available)? Using
up lots of <4G memory on something that doesn't need to be below 4G
sounds like a poor use of resources.
-Tony
next prev parent reply other threads:[~2006-03-02 4:15 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-01 1:10 Zou Nan hai
2006-03-02 4:15 ` Tony Luck [this message]
2006-03-02 4:30 ` Andi Kleen
2006-03-02 4:33 ` Zou Nan hai
2006-03-07 8:39 ` Andi Kleen
2006-03-07 23:23 ` Zou Nan hai
2006-03-08 9:33 ` Andi Kleen
2006-03-02 9:09 Zhang, Yanmin
2006-03-02 23:35 ` Zou Nan hai
2006-03-03 1:32 ` Andi Kleen
2006-03-03 1:59 Pallipadi, Venkatesh
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