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[77.234.64.129]) by smtp.gmail.com with ESMTPSA id d9sm4677050wrw.26.2021.08.17.23.39.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Aug 2021 23:39:15 -0700 (PDT) Sender: Ingo Molnar Date: Wed, 18 Aug 2021 08:39:13 +0200 From: Ingo Molnar To: "Paul E. McKenney" Cc: elver@google.com, mark.rutland@arm.com, tglx@linutronix.de, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, kernel-team@fb.com, Peter Zijlstra Subject: Re: [GIT PULL kcsan] KCSAN commits for v5.15 Message-ID: References: <20210812001359.GA404252@paulmck-ThinkPad-P17-Gen-1> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210812001359.GA404252@paulmck-ThinkPad-P17-Gen-1> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Paul E. McKenney wrote: > Hello, Ingo, > > This pull request contains updates for the Kernel concurrency sanitizer > (KCSAN). > > These updates improve comments, introduce CONFIG_KCSAN_STRICT (which RCU > uses), optimize use of get_ctx() by kcsan_found_watchpoint(), rework > atomic.h into permissive.h, and add the ability to ignore writes that > change only one bit of a given data-racy variable. > > These updates have been posted on LKML: > > https://lore.kernel.org/lkml/20210721210726.GA828672@paulmck-ThinkPad-P17-Gen-1/ > > These changes are based on v5.14-rc2, have been exposed to -next and to > kbuild test robot, and are available in the Git repository at: > > git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git kcsan > > for you to fetch changes up to e04938042d77addc7f41d983aebea125cddbed33: > > kcsan: Make strict mode imply interruptible watchers (2021-07-20 13:49:44 -0700) > > ---------------------------------------------------------------- > Marco Elver (8): > kcsan: Improve some Kconfig comments > kcsan: Remove CONFIG_KCSAN_DEBUG > kcsan: Introduce CONFIG_KCSAN_STRICT > kcsan: Reduce get_ctx() uses in kcsan_found_watchpoint() > kcsan: Rework atomic.h into permissive.h > kcsan: Print if strict or non-strict during init > kcsan: permissive: Ignore data-racy 1-bit value changes > kcsan: Make strict mode imply interruptible watchers > > Documentation/dev-tools/kcsan.rst | 12 +++++ > kernel/kcsan/atomic.h | 23 ---------- > kernel/kcsan/core.c | 77 ++++++++++++++++++++------------ > kernel/kcsan/kcsan_test.c | 32 +++++++++++++ > kernel/kcsan/permissive.h | 94 +++++++++++++++++++++++++++++++++++++++ > lib/Kconfig.kcsan | 42 ++++++++++++----- > 6 files changed, 217 insertions(+), 63 deletions(-) > delete mode 100644 kernel/kcsan/atomic.h > create mode 100644 kernel/kcsan/permissive.h Pulled into tip:locking/debug, thanks a lot Paul! Ingo