From: Andrew Morton <akpm@osdl.org>
To: "Chen, Kenneth W" <kenneth.w.chen@intel.com>
Cc: mrustad@mac.com, linux-kernel@vger.kernel.org
Subject: Re: 2.6.16 hugetlbfs problem - DEBUG_PAGEALLOC
Date: Fri, 24 Mar 2006 18:53:31 -0800 [thread overview]
Message-ID: <20060324185331.56837b0a.akpm@osdl.org> (raw)
In-Reply-To: <200603250124.k2P1OKg21526@unix-os.sc.intel.com>
"Chen, Kenneth W" <kenneth.w.chen@intel.com> wrote:
>
> Mark Rustad wrote on Friday, March 24, 2006 9:52 AM
> > I have narrowed this down to DEBUG_PAGEALLOC. If that option is
> > enabled, attempts to reference areas mmap-ed from hugetlbfs files
> > fault forever. You can see that I had that set in the failing config
> > I reported below.
>
> Yeah, it turns out that the debug option is not compatible with hugetlb
> page support. That debug option turns off PSE. Once it is turned off in
> CR4, cpu will ignore pse bit in the pmd and causing infinite page-not-
> present fault :-(
I wonder if any of the other architectures which implement both these
features might have problems too.
next prev parent reply other threads:[~2006-03-25 2:57 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-22 22:10 2.6.16 hugetlbfs problem Mark Rustad
2006-03-22 22:13 ` David S. Miller
2006-03-22 23:32 ` Mark Rustad
2006-03-23 5:43 ` Chen, Kenneth W
2006-03-23 15:36 ` Mark Rustad
2006-03-23 19:13 ` Mark Rustad
2006-03-24 17:52 ` 2.6.16 hugetlbfs problem - DEBUG_PAGEALLOC Mark Rustad
2006-03-25 1:24 ` Chen, Kenneth W
2006-03-25 1:47 ` David S. Miller
2006-03-25 2:53 ` Andrew Morton [this message]
2006-03-25 7:29 ` Chen, Kenneth W
2006-03-25 8:15 ` Andrew Morton
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