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b=GOE5Rr4qgmLYU2OH4Qi47OtekLjs+ja1Duqn/llCdgWOet+tpqceQ/ScTNFQT81uq p+tCsjAb/YkYh4ONw8FYpMf5VZE9ff3ECyxpUHXUwzfvEvKqvUGk8X+O/+gH5DuMlP 6z0lZfunwTkL0qJ3/YYMeCxMlltNiapBGZG0ZSCz9yFLFuJmKQfr7HhFJagDekaW5S MRKXMmOp5lGba67NTRMOX4/oV6NHBgYZl4rKau4kKBq94ePVbTQJ8peCjE9dJ82k6h wClQA1L/NANAfFyuMgMTiyxy785U6AuedrPKMIfR6tVaf+NFmq9KxpNrLKyO0GI5uM KHe56FJUFh4Pg== Date: Tue, 7 Apr 2026 15:33:00 +0100 From: Lorenzo Stoakes To: Kevin Brodsky Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Yury Khrustalev , Jonathan Corbet , Shuah Khan , Dave Hansen , Andrew Morton , Vlastimil Babka , David Hildenbrand , Mark Rutland , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH] docs: proc: document ProtectionKey in smaps Message-ID: References: <20260407125133.564182-1-kevin.brodsky@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260407125133.564182-1-kevin.brodsky@arm.com> X-Rspam-User: X-Rspamd-Queue-Id: 5855F180008 X-Stat-Signature: 9joy7mc1sk7szx9gza3zbw44ryhk1qbr X-Rspamd-Server: rspam06 X-HE-Tag: 1775572387-735677 X-HE-Meta: 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 71iEqYLK 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Apr 07, 2026 at 01:51:33PM +0100, Kevin Brodsky wrote: > The ProtectionKey entry was added in v4.9; back then it was > x86-specific, but it now lives in generic code and applies to all > architectures supporting pkeys (currently x86, power, arm64). > > Time to document it: add a paragraph to proc.rst about the > ProtectionKey entry. > > Reported-by: Yury Khrustalev > Signed-off-by: Kevin Brodsky LGTM, So: Reviewed-by: Lorenzo Stoakes > --- > Cc: Jonathan Corbet > Cc: Shuah Khan > Cc: Dave Hansen > Cc: Andrew Morton > Cc: Lorenzo Stoakes > Cc: Vlastimil Babka > Cc: David Hildenbrand > Cc: Mark Rutland > Cc: linux-fsdevel@vger.kernel.org > Cc: linux-mm@kvack.org > --- > Documentation/filesystems/proc.rst | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst > index b0c0d1b45b99..d673cad7dbe4 100644 > --- a/Documentation/filesystems/proc.rst > +++ b/Documentation/filesystems/proc.rst > @@ -549,6 +549,10 @@ does not take into account swapped out page of underlying shmem objects. > naturally aligned THP pages of any currently enabled size. 1 if true, 0 > otherwise. > > +If both the kernel and the system support protection keys (pkeys), > +"ProtectionKey" indicates the memory protection key associated with the > +virtual memory area. > + > "VmFlags" field deserves a separate description. This member represents the > kernel flags associated with the particular virtual memory area in two letter > encoded manner. The codes are the following: > -- > 2.51.2 >