* + tools-kvm_stat-use-canonical-ftrace-path.patch added to mm-nonmm-unstable branch
@ 2023-03-14 21:54 Andrew Morton
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From: Andrew Morton @ 2023-03-14 21:54 UTC (permalink / raw)
To: mm-commits, tycho, shuah, rostedt, quic_mojha, pbonzini,
mhiramat, me, mark.rutland, zwisler, akpm
The patch titled
Subject: tools/kvm_stat: use canonical ftrace path
has been added to the -mm mm-nonmm-unstable branch. Its filename is
tools-kvm_stat-use-canonical-ftrace-path.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/tools-kvm_stat-use-canonical-ftrace-path.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Ross Zwisler <zwisler@google.com>
Subject: tools/kvm_stat: use canonical ftrace path
Date: Mon, 13 Mar 2023 15:17:45 -0600
The canonical location for the tracefs filesystem is at /sys/kernel/tracing.
But, from Documentation/trace/ftrace.rst:
Before 4.1, all ftrace tracing control files were within the debugfs
file system, which is typically located at /sys/kernel/debug/tracing.
For backward compatibility, when mounting the debugfs file system,
the tracefs file system will be automatically mounted at:
/sys/kernel/debug/tracing
A comment in kvm_stat still refers to this older debugfs path, so let's
update it to avoid confusion.
Link: https://lkml.kernel.org/r/20230313211746.1541525-3-zwisler@kernel.org
Signed-off-by: Ross Zwisler <zwisler@google.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Reviewed-by: Mukesh Ojha <quic_mojha@quicinc.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: "Tobin C. Harding" <me@tobin.cc>
Cc: Tycho Andersen <tycho@tycho.pizza>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
--- a/tools/kvm/kvm_stat/kvm_stat~tools-kvm_stat-use-canonical-ftrace-path
+++ a/tools/kvm/kvm_stat/kvm_stat
@@ -627,7 +627,7 @@ class TracepointProvider(Provider):
name)'.
All available events have directories under
- /sys/kernel/debug/tracing/events/ which export information
+ /sys/kernel/tracing/events/ which export information
about the specific event. Therefore, listing the dirs gives us
a list of all available events.
_
Patches currently in -mm which might be from zwisler@google.com are
selftests-use-canonical-ftrace-path.patch
leaking_addresses-also-skip-canonical-ftrace-path.patch
tools-kvm_stat-use-canonical-ftrace-path.patch
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