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Accepting request 885467 from home:markkp:branches:Base:System

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- Added s390-tools-sles15sp3-dasd-change-DASD-udev-rule-to-set-none-scheduler.patch
  dasd: change default scheduler to reduce CPU consumption (bsc#1183810)
- Modified s390-tools-sles12-create-filesystem-links.patch to fit after
  applying s390-tools-sles15sp3-dasd-change-DASD-udev-rule-to-set-none-scheduler.patch
- Removed 59-dasd.rules-wait_for.patch obsoleted by bsc#1183810.

OBS-URL: https://build.opensuse.org/request/show/885467
OBS-URL: https://build.opensuse.org/package/show/Base:System/s390-tools?expand=0&rev=116
This commit is contained in:
Mark Post 2021-04-14 20:07:00 +00:00 committed by Git OBS Bridge
parent 9901451234
commit 02084eb837
4 changed files with 67 additions and 6 deletions
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2
s390-tools-sles12-create-filesystem-links.patch
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@ -23,4 +23,4 @@
+
LABEL="dasd_symlinks_end"
# on device add set request queue scheduler to deadline
# on device add set request queue scheduler to none

52
s390-tools-sles15sp3-dasd-change-DASD-udev-rule-to-set-none-scheduler.patch Normal file
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@ -0,0 +1,52 @@
Subject: [PATCH] [BZ 192049] udev/dasd: change DASD udev-rule to set none scheduler
From: Stefan Haberland <sth@linux.ibm.com>
Description: dasd: change default scheduler to reduce CPU consumption
Symptom: CPU consumption up to 20% higher for mq-deadline
compared to none scheduler for DASD devices with no
difference in throughput.
Problem: Performance analysis showed that with recent DASD
device drivers using multi-queue block queuing the
throughput of mq-deadline and none scheduler is nearly
identical but the CPU consumption of mq-deadline
scheduler due to its optimizations is up to 20% higher
compared to none scheduler.
Solution: Set none scheduler as default in the DASD udev rule.
Reproduction: Use DASD devices with mq-deadline scheduler.
Upstream-ID: a65bc51cf4e5c1fe628bb182cc1a02ee83eb102d
Problem-ID: 192049
Upstream-Description:
udev/dasd: change DASD udev-rule to set none scheduler
Performance evaluation showed that using the mq-deadline scheduler for DASD
devices leads to a significantly higher CPU consumption compared to using
none scheduler while having the same amount of throughput.
Setting none scheduler as default in the dasd udev rule.
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Signed-off-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
---
etc/udev/rules.d/59-dasd.rules | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/etc/udev/rules.d/59-dasd.rules
+++ b/etc/udev/rules.d/59-dasd.rules
@@ -26,10 +26,10 @@
LABEL="dasd_symlinks_end"
-# on device add set request queue scheduler to deadline
+# on device add set request queue scheduler to none
SUBSYSTEM!="block", GOTO="sched_end"
ACTION!="change", GOTO="sched_end"
-KERNEL=="dasd*[!0-9]", TEST=="queue/scheduler", ATTR{queue/scheduler}="deadline"
+KERNEL=="dasd*[!0-9]", TEST=="queue/scheduler", ATTR{queue/scheduler}="none"
LABEL="sched_end"

9
s390-tools.changes
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@ -1,3 +1,12 @@
-------------------------------------------------------------------
Wed Apr 14 18:13:27 UTC 2021 - Mark Post <mpost@suse.com>
- Added s390-tools-sles15sp3-dasd-change-DASD-udev-rule-to-set-none-scheduler.patch
dasd: change default scheduler to reduce CPU consumption (bsc#1183810)
- Modified s390-tools-sles12-create-filesystem-links.patch to fit after
applying s390-tools-sles15sp3-dasd-change-DASD-udev-rule-to-set-none-scheduler.patch
- Removed 59-dasd.rules-wait_for.patch obsoleted by bsc#1183810.
-------------------------------------------------------------------
Mon Mar 8 20:52:57 UTC 2021 - Mark Post <mpost@suse.com>

10
s390-tools.spec
View File

@ -99,6 +99,7 @@ Patch9: s390-tools-sles15sp3-03-genprotimg-require-argument-for-ramdisk-
Patch10: s390-tools-sles15sp3-04-genprotimg-add-host-key-document-verification-suppor.patch
Patch11: s390-tools-sles15sp3-zkey-Fix-APQN-property-names.patch
Patch12: s390-tools-sles15sp3-zipl-fix-4k-scsi-ipl.patch
Patch13: s390-tools-sles15sp3-dasd-change-DASD-udev-rule-to-set-none-scheduler.patch
# SUSE patches
Patch900: s390-tools-sles12-zipl_boot_msg.patch
@ -110,11 +111,10 @@ Patch905: s390-tools-sles15sp3-Format-devices-in-parallel.patch
Patch906: s390-tools-sles15sp3-Implement-Y-yast_mode.patch
Patch907: s390-tools-sles15sp3-Implement-f-for-backwards-compability.patch
Patch908: s390-tools-sles15sp3-dasdfmt-retry-BIODASDINFO-if-device-is-busy.patch
Patch909: 59-dasd.rules-wait_for.patch
Patch910: s390-tools-sles12-fdasd-skip-partition-check-and-BLKRRPART-ioctl.patch
Patch911: s390-tools-sles15sp1-11-zdev-Do-not-call-zipl-on-initrd-update.patch
Patch912: s390-tools-sles15sp3-check-return-code-from-util_file_read_l.patch
Patch913: s390-tools-sles15sp3-remove-no-pie-link-arguments.patch
Patch909: s390-tools-sles12-fdasd-skip-partition-check-and-BLKRRPART-ioctl.patch
Patch910: s390-tools-sles15sp1-11-zdev-Do-not-call-zipl-on-initrd-update.patch
Patch911: s390-tools-sles15sp3-check-return-code-from-util_file_read_l.patch
Patch912: s390-tools-sles15sp3-remove-no-pie-link-arguments.patch
BuildRequires: curl-devel
BuildRequires: dracut