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From: Dave Hansen <dave.hansen@intel.com>
To: Prakash Sangappa <prakash.sangappa@oracle.com>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH RFC] hugetlbfs 'noautofill' mount option
Date: Tue, 2 May 2017 14:32:42 -0700	[thread overview]
Message-ID: <7ff6fb32-7d16-af4f-d9d5-698ab7e9e14b@intel.com> (raw)
In-Reply-To: <b0efc671-0d7a-0aef-5646-a635478c31b0@oracle.com>

On 05/01/2017 11:00 AM, Prakash Sangappa wrote:
> This patch adds a new hugetlbfs mount option 'noautofill', to indicate that
> pages should not be allocated at page fault time when accessed thru mmapped
> address.

I think the main argument against doing something like this is further
specializing hugetlbfs.  I was really hoping that userfaultfd would be
usable for your needs here.

Could you elaborate on other options that you considered?  Did you look
at userfaultfd?  What about an madvise() option that disallows backing
allocations?

  parent reply	other threads:[~2017-05-02 21:32 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <326e38dd-b4a8-e0ca-6ff7-af60e8045c74@oracle.com>
2017-05-01 18:00 ` [PATCH RFC] hugetlbfs 'noautofill' mount option Prakash Sangappa
2017-05-02 10:53   ` Anshuman Khandual
2017-05-02 16:07     ` Prakash Sangappa
2017-05-02 21:32   ` Dave Hansen [this message]
2017-05-02 23:34     ` Prakash Sangappa
2017-05-02 23:43       ` Dave Hansen
2017-05-03 19:02         ` Prakash Sangappa
2017-05-08  5:57           ` Prakash Sangappa
2017-05-08 15:58           ` Dave Hansen
2017-05-08 22:12             ` prakash.sangappa
2017-05-09  8:58               ` Christoph Hellwig
2017-05-09 20:59                 ` Prakash Sangappa
2017-05-16 16:51                   ` Prakash Sangappa
2017-06-16 13:15                   ` Andrea Arcangeli
2017-06-20 23:35                     ` Prakash Sangappa
2017-06-27 20:57                       ` Prakash Sangappa

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