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From: Peter Zijlstra <peterz@infradead.org>
To: keescook@chromium.org, jannh@google.com
Cc: linux-kernel@vger.kernel.org, peterz@infradead.org,
	vcaputo@pengaru.com, mingo@redhat.com, juri.lelli@redhat.com,
	vincent.guittot@linaro.org, dietmar.eggemann@arm.com,
	rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de,
	bristot@redhat.com, akpm@linux-foundation.org,
	christian.brauner@ubuntu.com, amistry@google.com,
	Kenta.Tada@sony.com, legion@kernel.org,
	michael.weiss@aisec.fraunhofer.de, mhocko@suse.com,
	deller@gmx.de, zhengqi.arch@bytedance.com, me@tobin.cc,
	tycho@tycho.pizza, tglx@linutronix.de, bp@alien8.de,
	hpa@zytor.com, mark.rutland@arm.com, axboe@kernel.dk,
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	dave.hansen@linux.intel.com, ebiederm@xmission.com,
	ohoono.kwon@samsung.com, kaleshsingh@google.com,
	yifeifz2@illinois.edu, jpoimboe@redhat.com,
	linux-hardening@vger.kernel.org, linux-arch@vger.kernel.org,
	vgupta@kernel.org, linux@armlinux.org.uk, will@kernel.org,
	guoren@kernel.org, bcain@codeaurora.org, monstr@monstr.eu,
	tsbogend@alpha.franken.de, nickhu@andestech.com,
	jonas@southpole.se, mpe@ellerman.id.au, paul.walmsley@sifive.com,
	hca@linux.ibm.com, ysato@users.sourceforge.jp,
	davem@davemloft.net, chris@zankel.net
Subject: [PATCH 0/7] wchan: Fix wchan support
Date: Fri, 08 Oct 2021 13:15:27 +0200	[thread overview]
Message-ID: <20211008111527.438276127@infradead.org> (raw)

Hi,

This fixes up wchan which is various degrees of broken across the
architectures.

Patch 4 fixes wchan for x86, which has been returning 0 for the past many
releases.

Patch 5 fixes the fundamental race against scheduling.

Patch 6 deletes a lot and makes STACKTRACE unconditional

patch 7 fixes up a few STACKTRACE arch oddities

0day says all builds are good, so it must be perfect :-) I'm planning on
queueing up at least the first 5 patches, but I'm hoping the last two patches
can be too.

Also available here:

  git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/wchan

---
 arch/alpha/include/asm/processor.h      |  2 +-
 arch/alpha/kernel/process.c             |  5 ++-
 arch/arc/include/asm/processor.h        |  2 --
 arch/arc/kernel/stacktrace.c            | 19 +---------
 arch/arm/include/asm/processor.h        |  2 --
 arch/arm/kernel/process.c               | 24 -------------
 arch/arm64/include/asm/processor.h      |  2 --
 arch/arm64/kernel/process.c             | 28 ---------------
 arch/csky/include/asm/processor.h       |  2 --
 arch/csky/kernel/stacktrace.c           | 26 ++++----------
 arch/h8300/include/asm/processor.h      |  2 +-
 arch/h8300/kernel/process.c             |  5 +--
 arch/hexagon/include/asm/processor.h    |  3 --
 arch/hexagon/kernel/process.c           | 28 ---------------
 arch/ia64/include/asm/processor.h       |  3 --
 arch/ia64/kernel/process.c              | 31 -----------------
 arch/m68k/include/asm/processor.h       |  2 +-
 arch/m68k/kernel/process.c              |  4 +--
 arch/microblaze/include/asm/processor.h |  2 --
 arch/microblaze/kernel/process.c        |  6 ----
 arch/mips/include/asm/processor.h       |  2 --
 arch/mips/kernel/process.c              | 31 +----------------
 arch/mips/kernel/stacktrace.c           | 27 ++++++++------
 arch/nds32/include/asm/processor.h      |  2 --
 arch/nds32/kernel/process.c             | 28 ---------------
 arch/nds32/kernel/stacktrace.c          | 21 +++++------
 arch/nios2/include/asm/processor.h      |  2 +-
 arch/nios2/kernel/process.c             |  5 +--
 arch/openrisc/include/asm/processor.h   |  1 -
 arch/openrisc/kernel/process.c          |  6 ----
 arch/parisc/include/asm/processor.h     |  2 --
 arch/parisc/kernel/process.c            | 27 --------------
 arch/powerpc/include/asm/processor.h    |  2 --
 arch/powerpc/kernel/process.c           | 40 ---------------------
 arch/riscv/include/asm/processor.h      |  3 --
 arch/riscv/kernel/stacktrace.c          | 23 ------------
 arch/s390/include/asm/processor.h       |  1 -
 arch/s390/kernel/process.c              | 29 ---------------
 arch/sh/include/asm/processor_32.h      |  2 --
 arch/sh/kernel/process_32.c             | 22 ------------
 arch/sparc/include/asm/processor_32.h   |  2 +-
 arch/sparc/include/asm/processor_64.h   |  2 --
 arch/sparc/kernel/process_32.c          |  5 +--
 arch/sparc/kernel/process_64.c          | 31 -----------------
 arch/um/include/asm/processor-generic.h |  1 -
 arch/um/kernel/process.c                | 35 -------------------
 arch/x86/include/asm/processor.h        |  2 --
 arch/x86/kernel/process.c               | 62 ---------------------------------
 arch/xtensa/include/asm/processor.h     |  2 --
 arch/xtensa/kernel/process.c            | 32 -----------------
 fs/proc/array.c                         |  7 ++--
 fs/proc/base.c                          | 19 +++++-----
 include/linux/sched.h                   |  1 +
 kernel/sched/core.c                     | 34 ++++++++++++++++++
 lib/Kconfig.debug                       |  7 +---
 scripts/leaking_addresses.pl            |  3 +-
 56 files changed, 97 insertions(+), 622 deletions(-)


             reply	other threads:[~2021-10-08 11:18 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-08 11:15 Peter Zijlstra [this message]
2021-10-08 11:15 ` [PATCH 1/7] Revert "proc/wchan: use printk format instead of lookup_symbol_name()" Peter Zijlstra
2021-10-15  9:45   ` [tip: sched/core] " tip-bot2 for Kees Cook
2021-10-08 11:15 ` [PATCH 2/7] leaking_addresses: Always print a trailing newline Peter Zijlstra
2021-10-15  9:45   ` [tip: sched/core] " tip-bot2 for Kees Cook
2021-10-08 11:15 ` [PATCH 3/7] proc: Use task_is_running() for wchan in /proc/$pid/stat Peter Zijlstra
2021-10-15  9:45   ` [tip: sched/core] " tip-bot2 for Kees Cook
2021-10-08 11:15 ` [PATCH 4/7] x86: Fix get_wchan() to support the ORC unwinder Peter Zijlstra
2021-10-15  9:45   ` [tip: sched/core] " tip-bot2 for Qi Zheng
2021-10-08 11:15 ` [PATCH 5/7] sched: Add wrapper for get_wchan() to keep task blocked Peter Zijlstra
2021-10-08 11:26   ` Geert Uytterhoeven
2021-10-08 12:45   ` Mark Rutland
2021-10-14 10:46   ` Russell King (Oracle)
2021-10-15  9:45   ` [tip: sched/core] " tip-bot2 for Kees Cook
2021-10-08 11:15 ` [PATCH 6/7] arch: __get_wchan || STACKTRACE_SUPPORT Peter Zijlstra
2021-10-08 12:40   ` Mark Rutland
2021-10-08 13:45     ` Peter Zijlstra
2021-10-08 16:17       ` Josh Poimboeuf
2021-10-14 18:07         ` Mark Rutland
2021-10-14 18:41           ` Josh Poimboeuf
2021-10-14 18:03       ` Mark Rutland
2021-10-14 18:48         ` Josh Poimboeuf
2021-10-14 11:07   ` Russell King (Oracle)
2021-10-08 11:15 ` [PATCH 7/7] arch: Fix STACKTRACE_SUPPORT Peter Zijlstra
2021-10-08 12:52   ` Mark Rutland
2021-10-09  9:36   ` Guo Ren
2021-10-14 12:02 ` [PATCH 0/7] wchan: Fix wchan support Russell King (Oracle)
2021-10-14 13:38   ` Russell King (Oracle)
2021-10-14 19:51     ` Josh Poimboeuf

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