linux-kernel - Re: [RFC PATCH v3 1/1] mmap_lock: add tracepoints around mmap

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Date:   Fri, 19 Jun 2020 10:29:02 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Axel Rasmussen <axelrasmussen@...gle.com>
Cc:     Michel Lespinasse <walken@...gle.com>,
        David Howells <dhowells@...hat.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Jonathan Adams <jwadams@...gle.com>,
        David Rientjes <rientjes@...gle.com>,
        Ying Han <yinghan@...gle.com>
Subject: Re: [RFC PATCH v3 1/1] mmap_lock: add tracepoints around mmap_lock
 acquisition

On Thu, Jun 18, 2020 at 03:22:25PM -0700, Axel Rasmussen wrote:

> 
>  include/linux/lockdep.h          |  47 ++++++
>  include/linux/mmap_lock.h        |  27 ++-
>  include/linux/rwsem.h            |  12 ++
>  include/trace/events/mmap_lock.h |  76 +++++++++
>  kernel/locking/rwsem.c           |  64 +++++++
>  mm/Kconfig                       |  19 +++
>  mm/Makefile                      |   1 +
>  mm/mmap_lock.c                   | 281 +++++++++++++++++++++++++++++++
>  8 files changed, 526 insertions(+), 1 deletion(-)
>  create mode 100644 include/trace/events/mmap_lock.h
>  create mode 100644 mm/mmap_lock.c

This should have been at least a hand-full of patches. Most definitely
not a single patch.