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([2001:a61:2553:a401:cfc6:2039:a9ec:21ff]) by smtp.gmail.com with ESMTPSA id v7sm698118wme.47.2021.04.05.14.13.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 05 Apr 2021 14:13:24 -0700 (PDT) Cc: mtk.manpages@gmail.com, Peter Xu , linux-man@vger.kernel.org, Mike Rapoport Subject: Re: [PATCH 4/5] ioctl_userfaultfd.2: Add UFFD_FEATURE_THREAD_ID docs To: Alejandro Colomar References: <20210405131307.2892-1-alx.manpages@gmail.com> <20210405131307.2892-5-alx.manpages@gmail.com> From: "Michael Kerrisk (man-pages)" Message-ID: <7560ffa5-cd0e-0d46-8558-abed963d0bac@gmail.com> Date: Mon, 5 Apr 2021 23:13:23 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.0 MIME-Version: 1.0 In-Reply-To: <20210405131307.2892-5-alx.manpages@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org Hello Alex, Peter. On 4/5/21 3:13 PM, Alejandro Colomar wrote: > From: Peter Xu > > UFFD_FEATURE_THREAD_ID is supported in Linux 4.14. > > Acked-by: Mike Rapoport > Signed-off-by: Peter Xu > Signed-off-by: Alejandro Colomar Patch applied. Thanks, Michael > --- > man2/ioctl_userfaultfd.2 | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/man2/ioctl_userfaultfd.2 b/man2/ioctl_userfaultfd.2 > index 9120bdf40..014c0b5c1 100644 > --- a/man2/ioctl_userfaultfd.2 > +++ b/man2/ioctl_userfaultfd.2 > @@ -208,6 +208,11 @@ signal will be sent to the faulting process. > Applications using this > feature will not require the use of a userfaultfd monitor for processing > memory accesses to the regions registered with userfaultfd. > +.TP > +.BR UFFD_FEATURE_THREAD_ID " (since Linux 4.14)" > +If this feature bit is set, > +.I uffd_msg.pagefault.feat.ptid > +will be set to the faulted thread ID for each page fault message. > .PP > The returned > .I ioctls > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/