From: "Sanjay AG" <agsanjay@email.com>
To: linux-mm@kvack.org
Subject: HighMem test
Date: Sat, 22 Jun 2002 06:00:53 +0800 [thread overview]
Message-ID: <20020621220053.26673.qmail@email.com> (raw)
Hi,
I am trying to test a ethernet driver that supports 64-bit addressing. I was hoping that I would see buffers which are mapped beyond the 4G physical addr (i.e > 32-bit) if I have HIGHMEM enabled and use apps that make use of "sendfile" for Zero-copy (like in pure-ftpd) on a IA-32 machine. However my pci_map_page for the buffer seems to have the upper-32 bits all 0's. Is there something I am missing w/regard to HighMem operation? or is there a better test app that I can use?
BTW my test machine setup has 5GB of RAM running a 2.4.16 HIGHMEM enabled kernel.
Would appreciate any responses or pointers...
-Sanjay
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next reply other threads:[~2002-06-21 22:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-21 22:00 Sanjay AG [this message]
2002-06-21 22:17 ` Benjamin LaHaise
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