RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Bug 1561162 - [RHEL7.5] Extreme performance impact caused by raid resync
Summary: [RHEL7.5] Extreme performance impact caused by raid resync
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: kernel
Version: 7.4
Hardware: All
OS: Linux
urgent
urgent
Target Milestone: rc
: 7.6
Assignee: Nigel Croxon
QA Contact: guazhang@redhat.com
URL:
Whiteboard:
: 1628499 (view as bug list)
Depends On:
Blocks: 1532680 1710345
TreeView+ depends on / blocked
 
Reported: 2018-03-27 19:05 UTC by John Pittman
Modified: 2022-03-13 14:48 UTC (History)
24 users (show)

Fixed In Version: kernel-3.10.0-951.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
: 1710345 (view as bug list)
Environment:
Last Closed: 2018-10-30 08:52:28 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
Proposed Patch (1.68 KB, application/mbox)
2018-08-29 13:07 UTC, Nigel Croxon 		no flags Details
Proposed Patch (1.87 KB, application/mbox)
2018-08-29 14:28 UTC, Nigel Croxon 		no flags Details
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:3083 0 None None None 2018-10-30 08:54:10 UTC

Description John Pittman 2018-03-27 19:05:31 UTC 
Description of problem:

This issue is a continuation of bz1455679.  Through continued research, it was found that the proper fix here is to revert the patch that causes the issue, ac8fa4196d20 ("md: allow resync to go faster when there is competing IO.).  

Version-Release number of selected component (if applicable):

kernel-3.10.0-693.17.1.el7

How reproducible:

Issue large amount of I/O during raid resync.  Easiest way to reproduce is to install to a md device that is resync'ing and watch partition creation & filesystem formatting time.

Prior to patch revert

19:58:39,249 INFO anaconda: Creating disklabel on /dev/sdb
....snip
20:23:30,488 INFO anaconda: Created swap on /dev/md/3
~ 25mins

After patch revert:

16:45:17,990 INFO anaconda: Creating disklabel on /dev/sdb
....snip
16:45:36,935 INFO anaconda: Created swap on /dev/md/3
~ 20secs

Expected results:

No detectable impact on I/O while raid resync is running.

Additional info:

Upstream discussion at https://marc.info/?l=linux-raid&m=152120839121813&w=2
Comment 6 John Pittman 2018-03-31 00:38:08 UTC 
Second attempt to get fix accepted upstream.
https://marc.info/?l=linux-raid&m=152235148327824&w=2

If they don't accept, maybe we can get something temporary into the RH stream.
Comment 10 guazhang@redhat.com 2018-05-29 02:09:08 UTC 
Hello

what's performance you want to get while raid resync ?
or what's the baseline time for the installing ?
Comment 36 guazhang@redhat.com 2018-08-29 03:26:53 UTC 
Hello


# cp test kernel to the dir   /var/www/html/guazhang/repo/test_kernel
# createrepo -u -o -d /var/www/html/guazhang/repo/
#  setenforce 0
#  lorax --product="RHEL" --version=7.6 --release=7.6 --source=http://download.lab.bos.redhat.com/rel-eng/RHEL-7.6-20180810.0/compose/Server/x86_64/os/ --source=http://download.lab.bos.redhat.com/rel-eng/RHEL-7.6-20180810.0/compose/Server-optional/x86_64/os/ --source http://pnate-control-01.lab.bos.redhat.com/guazhang/repo  --variant=Server --nomacboot --buildarch=x86_64 --volid=RHEL-7.6_Server.x86_64 ./updated_kernel




ks.cfg

lang en_US.UTF-8
keyboard us
url --url="http://pnate-control-01.lab.bos.redhat.com/guazhang/repo"
firewall --disabled
firstboot --disable
rootpw redhat
timezone Europe/Prague
reboot
clearpart --all
timezone America/New_York
ignoredisk --only-use=sda
bootloader --append="loglevel=5 crashkernel=auto" --location=mbr
zerombr
clearpart --all --initlabel
part raid.225 --ondisk=sda --size=512
part raid.231 --ondisk=sdb --size=512
part raid.261 --ondisk=sda --size=12288
part raid.255 --ondisk=sdb --size=12288
part raid.249 --ondisk=sda --size=12288
part raid.267 --ondisk=sdb --size=12288
part raid.237 --ondisk=sda --size=205824
part raid.243 --ondisk=sdb --size=205824
raid pv.285 --device=2 --fstype="lvmpv" --level=RAID1 raid.237 raid.243
raid / --device=1 --fstype="ext4" --level=RAID1 --mkfsoptions="-E nodiscard" raid.249 raid.255
raid /boot --device=0 --fstype="ext4" --level=RAID1 --mkfsoptions="-E nodiscard" raid.225 raid.231
raid swap --device=3 --fstype="swap" --level=RAID1 --mkfsoptions="-E nodiscard" raid.261 raid.267
volgroup vg00 --pesize=65536 pv.285
logvol /var/log  --fstype="ext4" --grow --size=1 --mkfsoptions="-E nodiscard" --name=log --vgname=vg00
logvol /usr  --fstype="ext4" --size=30000 --mkfsoptions="-E nodiscard" --name=usr --vgname=vg00
logvol /tmp  --fstype="ext4" --size=30000 --mkfsoptions="-E nodiscard" --name=tmp --vgname=vg00
logvol /opt  --fstype="ext4" --size=30000 --mkfsoptions="-E nodiscard" --name=opt --vgname=vg00
logvol /var  --fstype="ext4" --size=30000 --mkfsoptions="-E nodiscard" --name=var --vgname=vg00
logvol /home  --fstype="ext4" --size=30000 --mkfsoptions="-E nodiscard" --name=home --vgname=vg00
logvol /opt/mgtservices  --fstype="ext4" --size=30000 --mkfsoptions="-E nodiscard" --name=mgtservices --vgname=vg00


get errors
      
Traceback (most recent call last): 
  File "/usr/lib64/python2.7/site-packages/pyanaconda/threads.py", line 227, in run 
    threading.Thread.run(self, *args, **kwargs) 
Please make your choice from above:   File "/usr/lib64/python2.7/threading.py", line 765, in run 
    self.__target(*self.__args, **self.__kwargs) 
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/tui/spokes/software.py", line 238, in checkSoftwareSelection 
    self.payload.checkSoftwareSelection() 
  File "/usr/lib64/python2.7/site-packages/pyanaconda/packaging/yumpayload.py", line 1418, in checkSoftwareSelection 
    self._applyYumSelections() 
  File "/usr/lib64/python2.7/site-packages/pyanaconda/packaging/yumpayload.py", line 1360, in _applyYumSelections 
    self._selectYumGroup("core") 
  File "/usr/lib64/python2.7/site-packages/pyanaconda/packaging/yumpayload.py", line 1247, in _selectYumGroup 
    raise NoSuchGroup(groupid, required=required) 
pyanaconda.packaging.NoSuchGroup: core 
      
beaker job 
https://beaker.engineering.redhat.com/jobs/2728229

I just have a test the ISO with beaker server, but it seem the ISO build failed, Could someone have a look the errors ?

thanks
Guazhang
Comment 37 guazhang@redhat.com 2018-08-29 10:51:53 UTC 
Hello

I want to know how to replace the default kernel with test kernel in DVD.iso , then boot with test kernel for testing. 

Could someone have detail commands or guide ?

thanks
Guazhang
Comment 38 Nigel Croxon 2018-08-29 13:07:53 UTC 
Created attachment 1479489 [details]
Proposed Patch
Comment 40 Nigel Croxon 2018-08-29 14:28:32 UTC 
Created attachment 1479511 [details]
Proposed Patch
Comment 41 Bruno Meneguele 2018-09-07 15:16:45 UTC 
Patch(es) committed on kernel repository and an interim kernel build is undergoing testing
Comment 43 Bruno Meneguele 2018-09-10 14:27:30 UTC 
Patch(es) available on kernel-3.10.0-945.el7
Comment 45 Nigel Croxon 2018-09-11 18:23:21 UTC 
Nacking Heinz's patch for https://bugzilla.redhat.com/show_bug.cgi?id=1627563

I am resubmitting this patch, that broke LVM.

-Nigel
Comment 46 Nigel Croxon 2018-09-11 19:48:26 UTC 
Re-submitting the patch to rh kernel list now.
And moving this bz back to POST.

-Nigel
Comment 48 Jonathan Earl Brassow 2018-09-12 13:33:37 UTC 
Wait.  How did this bug go from POST -> ON_QA?  And why hasn't the 'Fixed In Version' changed?

I'm moving this back to POST.
Comment 49 Heinz Mauelshagen 2018-09-12 13:37:06 UTC 
*** Bug 1627563 has been marked as a duplicate of this bug. ***
Comment 52 XiaoNi 2018-09-17 10:35:30 UTC 
*** Bug 1628499 has been marked as a duplicate of this bug. ***
Comment 53 Bruno Meneguele 2018-09-17 22:50:51 UTC 
Patch(es) committed on kernel repository and an interim kernel build is undergoing testing
Comment 55 guazhang@redhat.com 2018-09-19 08:00:19 UTC 
Hello

Could someone help to check the bug if can move to "ON_QA" status so that QE will verify it with fix kernel ?

thanks
Guazhang
Comment 58 Bruno Meneguele 2018-09-19 12:55:11 UTC 
Patch(es) available on kernel-3.10.0-951.el7
Comment 61 guazhang@redhat.com 2018-10-08 01:29:23 UTC 
Hello

the bug has test passed, move to verified
Comment 63 errata-xmlrpc 2018-10-30 08:52:28 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2018:3083
Note You need to log in before you can comment on or make changes to this bug.