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NFS mount fails with CONFIG_HIGHMEM on MIPS 24Kc system on 2.6.24

To: linux-mips@linux-mips.org
Subject: NFS mount fails with CONFIG_HIGHMEM on MIPS 24Kc system on 2.6.24
From: David VomLehn <dvomlehn@cisco.com>
Date: Fri, 15 Feb 2008 12:17:45 -0800
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We have a 2.6.24final port to a MIPS 24Kc-based system which works normally without CONFIG_HIGHMEM enabled. When we enable HIGHMEM, the system boots normally using a CRAMFS root filesystem. If we use an NFS root filesystem, however, it appears to go through a normal boot, including the freeing of init memory, but then just sits indefinitely in r4k_wait().

I can see that using HIGHMEM enables use of kmap_atomic in networking code. Are there issues with networking or NFS with HIGHMEM enabled?

--
David VomLehn, dvomlehn@cisco.com
The opinions expressed herein are likely mine, but might not be my employer's...


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