linux-kernel - [PATCH 02/11] topolgy: simplify cputopology.txt formatting and wording

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Message-Id: <e13cb72d48bdaed80b681abf89bc77d58931db51.1550545163.git.len.brown@intel.com>
Date:   Mon, 18 Feb 2019 22:40:04 -0500
From:   Len Brown <lenb@...nel.org>
To:     x86@...nel.org
Cc:     linux-kernel@...r.kernel.org, Len Brown <len.brown@...el.com>,
        linux-doc@...r.kernel.org
Subject: [PATCH 02/11] topolgy: simplify cputopology.txt formatting and wording

From: Len Brown <len.brown@...el.com>

No semantic changes.

Signed-off-by: Len Brown <len.brown@...el.com>
Cc: linux-doc@...r.kernel.org
Signed-off-by: Len Brown <len.brown@...el.com>
---
 Documentation/cputopology.txt | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/Documentation/cputopology.txt b/Documentation/cputopology.txt
index c6e7e9196a8b..2698da7e4f49 100644
--- a/Documentation/cputopology.txt
+++ b/Documentation/cputopology.txt
@@ -3,76 +3,76 @@ How CPU topology info is exported via sysfs
 ===========================================

 Export CPU topology info via sysfs. Items (attributes) are similar
-to /proc/cpuinfo output of some architectures:
+to /proc/cpuinfo output of some architectures.  They reside in
+/sys/devices/system/cpu/cpuX/topology/:

-1) /sys/devices/system/cpu/cpuX/topology/physical_package_id:
+physical_package_id:

 	physical package id of cpuX. Typically corresponds to a physical
 	socket number, but the actual value is architecture and platform
 	dependent.

-2) /sys/devices/system/cpu/cpuX/topology/core_id:
+core_id:

 	the CPU core ID of cpuX. Typically it is the hardware platform's
 	identifier (rather than the kernel's).  The actual value is
 	architecture and platform dependent.

-3) /sys/devices/system/cpu/cpuX/topology/book_id:
+book_id:

 	the book ID of cpuX. Typically it is the hardware platform's
 	identifier (rather than the kernel's).	The actual value is
 	architecture and platform dependent.

-4) /sys/devices/system/cpu/cpuX/topology/drawer_id:
+drawer_id:

 	the drawer ID of cpuX. Typically it is the hardware platform's
 	identifier (rather than the kernel's).	The actual value is
 	architecture and platform dependent.

-5) /sys/devices/system/cpu/cpuX/topology/thread_siblings:
+thread_siblings:

 	internal kernel map of cpuX's hardware threads within the same
 	core as cpuX.

-6) /sys/devices/system/cpu/cpuX/topology/thread_siblings_list:
+thread_siblings_list:

 	human-readable list of cpuX's hardware threads within the same
 	core as cpuX.

-7) /sys/devices/system/cpu/cpuX/topology/core_siblings:
+core_siblings:

 	internal kernel map of cpuX's hardware threads within the same
 	physical_package_id.

-8) /sys/devices/system/cpu/cpuX/topology/core_siblings_list:
+core_siblings_list:

 	human-readable list of cpuX's hardware threads within the same
 	physical_package_id.

-9) /sys/devices/system/cpu/cpuX/topology/book_siblings:
+book_siblings:

 	internal kernel map of cpuX's hardware threads within the same
 	book_id.

-10) /sys/devices/system/cpu/cpuX/topology/book_siblings_list:
+book_siblings_list:

 	human-readable list of cpuX's hardware threads within the same
 	book_id.

-11) /sys/devices/system/cpu/cpuX/topology/drawer_siblings:
+drawer_siblings:

 	internal kernel map of cpuX's hardware threads within the same
 	drawer_id.

-12) /sys/devices/system/cpu/cpuX/topology/drawer_siblings_list:
+drawer_siblings_list:

 	human-readable list of cpuX's hardware threads within the same
 	drawer_id.

-To implement it in an architecture-neutral way, a new source file,
-drivers/base/topology.c, is to export the 6 to 12 attributes. The book
-and drawer related sysfs files will only be created if CONFIG_SCHED_BOOK
-and CONFIG_SCHED_DRAWER are selected.
+Architecture-neutral, drivers/base/topology.c, exports these attributes.
+However, the book and drawer related sysfs files will only be created if
+CONFIG_SCHED_BOOK and CONFIG_SCHED_DRAWER are selected, respectively.

 CONFIG_SCHED_BOOK and CONFIG_DRAWER are currently only used on s390, where
 they reflect the cpu and cache hierarchy.
-- 
2.18.0-rc0