File s390-tools-sles15sp3-dbginfo.sh-exclude-page_id... of Package s390-tools.28664

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File s390-tools-sles15sp3-dbginfo.sh-exclude-page_idle-bitmap.patch of Package s390-tools.28664

Subject: [PATCH] [BZ 195268] dbginfo.sh: exclude reading page_idle/bitmap sysfs attribute
From: Joern Siglen <sigleb@de.ibm.com>

Description:   dbginfo.sh: exclude /page_idle/bitmap from dump2tar
Symptom:       - crash dump or process restart on running dbginfo.sh  
Problem:       - reading /sys/kernel/mm/page_idle/bitmap can cause hang up
                on reading offline pages
Solution:      exclude /page_idle/bitmap from data collection
Reproduction:  -
Upstream-ID:   12c84469fd02690cca93c63fd23fe2aa9ea221b8
Problem-ID:    195268

Upstream-Description:

dbginfo.sh: exclude reading page_idle/bitmap sysfs attribute

Due to issues with reading the /sys/kernel/mm/page_idle/bitmap sysfs
              attribute that can lead to a system hang, reading this particular
              attribute is excluded.

Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1904884
              Reviewed-by: Mario Held <mario.held@linux.ibm.com>
              Signed-off-by: Joern Siglen <siglen@de.ibm.com>
              Signed-off-by: Jan Hoeppner <hoeppner@linux.ibm.com>

Signed-off-by: Joern Siglen <sigleb@de.ibm.com>
---
 scripts/dbginfo.sh |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/scripts/dbginfo.sh
+++ b/scripts/dbginfo.sh
@@ -2,7 +2,7 @@
 #
 # dbginfo.sh - Tool to collect runtime, configuration, and trace information
 #
-# Copyright IBM Corp. 2002, 2020
+# Copyright IBM Corp. 2002, 2021
 #
 # s390-tools is free software; you can redistribute it and/or modify
 # it under the terms of the MIT license. See LICENSE for details.
@@ -21,7 +21,7 @@ readonly SCRIPTNAME="${0##*/}"
 print_version() {
     cat <<EOF
 ${SCRIPTNAME}: Debug information script version %S390_TOOLS_VERSION%
-Copyright IBM Corp. 2002, 2020
+Copyright IBM Corp. 2002, 2021
 EOF
 }
 
@@ -684,7 +684,7 @@ collect_sysfs() {
 	# Collect sysfs files using multiple threads (-J 1) while excluding
 	# files known to block on read (-x). Stop reading a file that takes
 	# more than 5 seconds (-T 5) such as an active ftrace buffer.
-	dump2tar /sys -z -o "${WORKPATH}/sysfs.tgz" -x '*/tracing/trace_pipe*' \
+	dump2tar /sys -z -o "${WORKPATH}/sysfs.tgz" -x '*/tracing/trace_pipe*' -x '*/page_idle/bitmap*' \
 		 -x '*/tracing/per_cpu/*' --ignore-failed-read -J 1 -T 5
 
 	if [ $? -ne 0 ] ; then

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File s390-tools-sles15sp3-dbginfo.sh-exclude-page_idle-bitmap.patch of Package s390-tools.28664

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