Bug 1991958

Summary:	block: return ELEVATOR_DISCARD_MERGE if possible
Product:	Red Hat Enterprise Linux 9	Reporter:	Ming Lei <minlei>
Component:	kernel	Assignee:	Ming Lei <minlei>
kernel sub component:	Block Layer	QA Contact:	ChanghuiZhong <czhong>
Status:	CLOSED ERRATA	Docs Contact:
Severity:	unspecified
Priority:	unspecified	CC:	czhong, hkrzesin, jmoyer
Version:	9.0	Keywords:	Bugfix
Target Milestone:	beta	Flags:	pm-rhel: mirror+
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	kernel-5.14.0-10.el9	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-05-17 15:38:55 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Ming Lei 2021-08-10 13:33:41 UTC

Description of problem:

https://lore.kernel.org/linux-block/YRHyYmqxNSMMdyXo@T590/T/#t

block layer can't support mixed traditional discard range and
multi-range discard. But the issue existed since adding
multi-range discard.

The fix will land v5.15, so rhel9 needs to backport the fix


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

9.0

How reproducible:

not easy to reproduce


Steps to Reproduce:

N/A


Actual results:


Expected results:


Additional info:

Comment 4 Ming Lei 2021-10-20 13:51:05 UTC

Hello Changhui,

Any chance to review and ack this BZ if you are fine.

Comment 5 ChanghuiZhong 2021-10-21 01:39:33 UTC

(In reply to Ming Lei from comment #4)
> Hello Changhui,
> 
> Any chance to review and ack this BZ if you are fine.

Hello,Ming

setting qa_ack +

there is no reproducer available here. you mentioned that this issue is not easy to reproduce. 
is it enough for QE to run sanity testing here?

Thanks

Comment 9 ChanghuiZhong 2021-10-25 03:18:53 UTC

sanity test passed with 5.14.0-9.mr79_211021_1728.el9:
https://beaker.engineering.redhat.com/jobs/5923128
https://beaker.engineering.redhat.com/jobs/5926381
https://beaker.engineering.redhat.com/jobs/5923129

setting to verified:tested

Comment 13 ChanghuiZhong 2021-10-30 06:47:49 UTC

regression test pass with  kernel-5.14.0-10.el9:
https://beaker.engineering.redhat.com/jobs/5950305

all patches are included to kernel tree,
move to verified

Comment 15 errata-xmlrpc 2022-05-17 15:38:55 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 (new packages: kernel), 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/RHBA-2022:3907