linux-kernel - Re: [PATCH 2/5] ioctl_userfaultfd.2: describe memory types that can be used from 4.11

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Message-ID: <d22cd916-d9fc-71f7-d451-e4cbd818874c@gmail.com>
Date:   Wed, 26 Apr 2017 08:52:50 +0200
From:   "Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>
To:     Mike Rapoport <rppt@...ux.vnet.ibm.com>
Cc:     mtk.manpages@...il.com, Andrea Arcangeli <aarcange@...hat.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linux-man@...r.kernel.org
Subject: Re: [PATCH 2/5] ioctl_userfaultfd.2: describe memory types that can
 be used from 4.11

On 04/25/2017 06:29 PM, Mike Rapoport wrote:
> Signed-off-by: Mike Rapoport <rppt@...ux.vnet.ibm.com>

Thanks, Mike. Applied.

Cheers,

Michael

> ---
>  man2/ioctl_userfaultfd.2 | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/man2/ioctl_userfaultfd.2 b/man2/ioctl_userfaultfd.2
> index 66fbfdc..78abc4d 100644
> --- a/man2/ioctl_userfaultfd.2
> +++ b/man2/ioctl_userfaultfd.2
> @@ -169,11 +169,15 @@ field was not zero.
>  (Since Linux 4.3.)
>  Register a memory address range with the userfaultfd object.
>  The pages in the range must be "compatible".
> -In the current implementation,
> -.\" According to Mike Rapoport, this will change in Linux 4.11.
> +
> +Up to Linux kernel 4.11,
>  only private anonymous ranges are compatible for registering with
>  .BR UFFDIO_REGISTER .
>  
> +Since Linux 4.11,
> +hugetlbfs and shared memory ranges are also compatible with
> +.BR UFFDIO_REGISTER .
> +
>  The
>  .I argp
>  argument is a pointer to a
> 


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/