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From: Prakash Sangappa <prakash.sangappa@oracle.com>
To: Andrea Arcangeli <aarcange@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>,
	Dave Hansen <dave.hansen@intel.com>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Mike Rapoport <rppt@linux.vnet.ibm.com>,
	Mike Kravetz <mike.kravetz@oracle.com>
Subject: Re: [PATCH RFC] hugetlbfs 'noautofill' mount option
Date: Tue, 27 Jun 2017 13:57:48 -0700	[thread overview]
Message-ID: <b769dc7b-2486-b703-6346-1f80a092cc3f@oracle.com> (raw)
In-Reply-To: <47ea78b4-3b14-264e-2c92-e5e507fd3cba@oracle.com>



On 6/20/17 4:35 PM, Prakash Sangappa wrote:
>
>
> On 6/16/17 6:15 AM, Andrea Arcangeli wrote:
>> Adding a single if (ctx->feature & UFFD_FEATURE_SIGBUS) goto out,
>> branch for this corner case to handle_userfault() isn't great and the
>> hugetlbfs mount option is absolutely zero cost to the handle_userfault
>> which is primarily why I'm not against it.. although it's not going to
>> be measurable so it would be ok also to add such feature.
>
>
> If implementing UFFD_FEATURE_SIGBUS is preferred instead of the mount 
> option, I could look into that.
>
Implementing UFFD_FEATURE_SIGBUS seems reasonable.

I wanted to note here on this thread that I sent out a seperate
RFC patch review for adding UFFD_FEATURE_SIGBUS.

See,
http://marc.info/?l=linux-mm&m=149857975906880&w=2

      reply	other threads:[~2017-06-27 20:58 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 ` Prakash Sangappa
2017-05-02 10:53   ` Anshuman Khandual
2017-05-02 16:07     ` Prakash Sangappa
2017-05-02 21:32   ` Dave Hansen
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 [this message]

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