From: Rohit Seth <rseth@unix-os.sc.intel.com>
To: Benjamin LaHaise <bcrl@redhat.com>, rohit.seth@intel.com
Cc: dada1 <dada1@cosmosbay.com>,
Christoph Hellwig <hch@infradead.org>,
Rik van Riel <riel@conectiva.com.br>,
Andrew Morton <akpm@digeo.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [patch] remove hugetlb syscalls
Date: Thu, 14 Nov 2002 12:11:32 -0800 [thread overview]
Message-ID: <3DD40374.9050001@unix-os.sc.intel.com> (raw)
In-Reply-To: 20021114103147.A17468@redhat.com
Benjamin LaHaise wrote:
>On Thu, Nov 14, 2002 at 04:13:56PM +0100, dada1 wrote:
>
>
>>Thanks Christoph
>>
>>If I asked, this is because I tried the obvious and it doesnt work.
>>
>>
>
>It's a file. You need to use MAP_SHARED.
>
>
This is not the problem with MAP_SHARED. It is the lack of (arch
specific) hugepage aligned function support in the kernel. You can use
the mmap on hugetlbfs using only MAP_FIXED with properly aligned
addresses (but then this also is only a hint to kernel). With addr ==
NULL in mmap, the function is bound to fail almost all the times.
Thanks Ben for letting me know the problem with previous post.
>
>
WARNING: multiple messages have this Message-ID (diff)
From: Rohit Seth <rseth@unix-os.sc.intel.com>
To: Benjamin LaHaise <bcrl@redhat.com>, rohit.seth@intel.com
Cc: dada1 <dada1@cosmosbay.com>,
Christoph Hellwig <hch@infradead.org>,
Rik van Riel <riel@conectiva.com.br>,
Andrew Morton <akpm@digeo.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [patch] remove hugetlb syscalls
Date: Thu, 14 Nov 2002 12:11:32 -0800 [thread overview]
Message-ID: <3DD40374.9050001@unix-os.sc.intel.com> (raw)
In-Reply-To: 20021114103147.A17468@redhat.com
Benjamin LaHaise wrote:
>On Thu, Nov 14, 2002 at 04:13:56PM +0100, dada1 wrote:
>
>
>>Thanks Christoph
>>
>>If I asked, this is because I tried the obvious and it doesnt work.
>>
>>
>
>It's a file. You need to use MAP_SHARED.
>
>
This is not the problem with MAP_SHARED. It is the lack of (arch
specific) hugepage aligned function support in the kernel. You can use
the mmap on hugetlbfs using only MAP_FIXED with properly aligned
addresses (but then this also is only a hint to kernel). With addr ==
NULL in mmap, the function is bound to fail almost all the times.
Thanks Ben for letting me know the problem with previous post.
>
>
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next prev parent reply other threads:[~2002-11-14 20:07 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-13 23:45 [patch] remove hugetlb syscalls Benjamin LaHaise
2002-11-13 23:45 ` Benjamin LaHaise
2002-11-14 0:42 ` Rik van Riel
2002-11-14 0:42 ` Rik van Riel
2002-11-14 8:52 ` dada1
2002-11-14 8:52 ` dada1
2002-11-14 14:13 ` Christoph Hellwig
2002-11-14 14:13 ` Christoph Hellwig
[not found] ` <ugel9oa vk4.fsf@panda.mostang.com>
2002-11-14 15:13 ` dada1
2002-11-14 15:13 ` dada1
2002-11-14 15:31 ` Benjamin LaHaise
2002-11-14 15:31 ` Benjamin LaHaise
2002-11-14 15:38 ` dada1
2002-11-14 15:38 ` dada1
2002-11-14 20:11 ` Rohit Seth [this message]
2002-11-14 20:11 ` Rohit Seth
2002-11-14 20:36 ` William Lee Irwin III
2002-11-14 20:36 ` William Lee Irwin III
[not found] ` <3DD3FED2.2010901@unix-os.sc.intel.com>
2002-11-14 20:01 ` Benjamin LaHaise
2002-11-14 20:01 ` Benjamin LaHaise
2002-11-14 21:06 ` Benjamin LaHaise
2002-11-14 21:06 ` Benjamin LaHaise
2002-11-14 17:51 ` David Mosberger-Tang
2002-11-14 18:31 ` Alan Cox
2002-11-14 18:53 ` David Mosberger-Tang
2002-11-14 19:52 ` Alan Cox
2002-11-14 20:14 ` Alan Cox
2002-11-16 18:23 ` Jan Niehusmann
2002-11-14 20:34 ` William Lee Irwin III
2002-11-14 21:31 ` David Mosberger-Tang
2002-11-14 21:38 ` William Lee Irwin III
2002-11-14 21:46 ` David Mosberger-Tang
2002-11-14 19:28 ` Jeff Garzik
2002-11-14 20:15 ` Alan Cox
2002-11-16 18:00 ` Rik van Riel
2002-11-16 18:15 ` Linus Torvalds
2002-11-14 20:30 ` William Lee Irwin III
2002-11-14 20:30 ` William Lee Irwin III
2002-11-14 20:48 ` Benjamin LaHaise
2002-11-14 20:48 ` Benjamin LaHaise
2002-11-14 21:02 ` William Lee Irwin III
2002-11-14 21:02 ` William Lee Irwin III
2002-11-14 21:11 ` Benjamin LaHaise
2002-11-14 21:11 ` Benjamin LaHaise
2002-11-14 21:31 ` William Lee Irwin III
2002-11-14 21:31 ` William Lee Irwin III
2002-11-14 21:40 ` Rohit Seth
2002-11-14 21:40 ` Rohit Seth
2002-11-14 21:59 ` Benjamin LaHaise
2002-11-14 21:59 ` Benjamin LaHaise
2002-11-14 21:06 ` Benjamin LaHaise
2002-11-14 21:06 ` Benjamin LaHaise
2002-11-14 21:06 ` Benjamin LaHaise
2002-11-14 21:06 ` Benjamin LaHaise
-- strict thread matches above, loose matches on Subject: below --
2002-11-14 22:12 Seth, Rohit
2002-11-14 22:12 ` Seth, Rohit
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