Re: 2.6.16 hugetlbfs problem

[Mark Rustad <mrustad@mac.com>]

On Mar 22, 2006, at 4:13 PM, David S. Miller wrote:

> From: Mark Rustad <mrustad@mac.com>
> Date: Wed, 22 Mar 2006 16:10:33 -0600
>
>> I seem to be having trouble using hugetlbfs with kernel 2.6.16. I
>> have a small test program that worked with 2.6.16-rc5, but fails with
>> 2.6.16-rc6 or the release. The program is below. Given a path to a
>> file on a hugetlbfs, it opens/creates the file, mmaps it and tries to
>> access the first word. On 2.6.16-rc5, it works. On 2.6.16, it hangs
>> page-faulting until it is killed.
>
> On what platform?  Things like hugetlb and address space layout
> (you're requesting a specific mmap() address I noticed) are very
> platform specific.

This is on a Xeon, without PAE with the 1GB no-highmem memory map, in  
all three cases. This is a 32-bit kernel running on a Nacona CPU. I  
also had an unmap call over the range to be mmap-ed, but the failure/ 
success cases were the same, so I removed it to reduce the test  
program further.

-- 
Mark Rustad, MRustad@mac.com