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Bug 2152980

Summary:	Regression from 3.3-4 to 3.3-5 [rhel-7.9.z]
Product:	Red Hat Enterprise Linux 7	Reporter:	Paulo Andrade <pandrade>
Component:	diffutils	Assignee:	Than Ngo <than>
Status:	CLOSED ERRATA	QA Contact:	Evgeny Fedin <efedin>
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	7.9	CC:	efedin, kpfleming, ovasik, than
Target Milestone:	rc	Keywords:	Triaged, ZStream
Target Release:	---	Flags:	pm-rhel: mirror+
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	diffutils-3.3-6.el7_9	Doc Type:	Bug Fix
Doc Text:	it fixes the performance issue as regression.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-03-07 09:54:57 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 Paulo Andrade 2022-12-13 17:13:28 UTC

User has a sample usage where two files with 25k lines are compared.
There are very few, if any differences.

Prior to patch for bz#1611281 it runs very fast. But with the patch,
it just appears to hang at 100% cpu usage for 10s of minutes, not
appearing to go anywhere.

Issue was promptly discovered when starting a git bisect from v3.3
to v3.6, as it appears to have been fixed in diffutils 3.6 rpms,
but v3.3 does not have the issue, and the actual problem is the patch
diffutils-3.3-diffseq.patch

Comment 8 Than Ngo 2022-12-15 13:52:19 UTC

Hi Paulo,

please don't forget to add the customer's feedbacks into bugzilla!

Thanks

Comment 9 Paulo Andrade 2022-12-15 14:00:03 UTC

  Hi Than,

  Customer should provide feedback on the test package soon.

Comment 26 errata-xmlrpc 2023-03-07 09:54:57 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 (diffutils bug fix and enhancement update), 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-2023:1098