Messages in this thread Patch in this message | | | Date | Wed, 21 Feb 2018 02:42:24 -0800 | From | tip-bot for Andrea Parri <> | Subject | [tip:locking/core] Documentation/memory-barriers.txt: Cross-reference "tools/memory-model/" |
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Commit-ID: 621df431b0ac931e318679f54047c47eb23cfdd2 Gitweb: https://git.kernel.org/tip/621df431b0ac931e318679f54047c47eb23cfdd2 Author: Andrea Parri <parri.andrea@gmail.com> AuthorDate: Tue, 20 Feb 2018 15:25:07 -0800 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Wed, 21 Feb 2018 09:58:14 +0100
Documentation/memory-barriers.txt: Cross-reference "tools/memory-model/"
A memory consistency model is now available for the Linux kernel [1], which "can (roughly speaking) be thought of as an automated version of memory-barriers.txt" and which is (in turn) "accompanied by extensive documentation on its use and its design".
Inform the (occasional) reader of memory-barriers.txt of these developments.
[1] https://marc.info/?l=linux-kernel&m=151687290114799&w=2
Co-developed-by: Andrea Parri <parri.andrea@gmail.com> Co-developed-by: Akira Yokosawa <akiyks@gmail.com> Signed-off-by: Andrea Parri <parri.andrea@gmail.com> Signed-off-by: Akira Yokosawa <akiyks@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: boqun.feng@gmail.com Cc: dhowells@redhat.com Cc: j.alglave@ucl.ac.uk Cc: linux-arch@vger.kernel.org Cc: luc.maranget@inria.fr Cc: nborisov@suse.com Cc: npiggin@gmail.com Cc: stern@rowland.harvard.edu Cc: will.deacon@arm.com Link: http://lkml.kernel.org/r/1519169112-20593-7-git-send-email-paulmck@linux.vnet.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org> --- Documentation/memory-barriers.txt | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/Documentation/memory-barriers.txt b/Documentation/memory-barriers.txt index a863009..a37d3af 100644 --- a/Documentation/memory-barriers.txt +++ b/Documentation/memory-barriers.txt @@ -14,7 +14,11 @@ DISCLAIMER This document is not a specification; it is intentionally (for the sake of brevity) and unintentionally (due to being human) incomplete. This document is meant as a guide to using the various memory barriers provided by Linux, but -in case of any doubt (and there are many) please ask. +in case of any doubt (and there are many) please ask. Some doubts may be +resolved by referring to the formal memory consistency model and related +documentation at tools/memory-model/. Nevertheless, even this memory +model should be viewed as the collective opinion of its maintainers rather +than as an infallible oracle. To repeat, this document is not a specification of what Linux expects from hardware.
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