Bug 1231651 – nfs-ganesha: 100% CPU usage with upcall feature enabled

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Bug 1231651 - nfs-ganesha: 100% CPU usage with upcall feature enabled

Summary:	nfs-ganesha: 100% CPU usage with upcall feature enabled

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Gluster Storage
Classification:	Red Hat
Component:	nfs-ganesha (Show other bugs)
Sub Component:
Version:	3.1
Hardware:	Unspecified Unspecified

Priority	medium Severity unspecified
Target Milestone:	---
Target Release:	RHGS 3.1.0
Assigned To:	Soumya Koduri
QA Contact:	Apeksha
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:	1231516
Blocks:	1202842
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Reported:	2015-06-15 03:30 EDT by Soumya Koduri
Modified:	2015-07-29 01:03 EDT (History)
CC List:	6 users (show)

See Also:
Fixed In Version:	glusterfs-3.7.1-4
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2015-07-29 01:03:20 EDT
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2015:1495	normal	SHIPPED_LIVE	Important: Red Hat Gluster Storage 3.1 update	2015-07-29 04:26:26 EDT

Groups: None (edit)

Description Soumya Koduri 2015-06-15 03:30:26 EDT

Description of problem:

In NFS-Ganesha, a thread loops in continuously to poll for upcall events which may lead to 100% CPU usage. Fix has been provided in NFS-Ganesha upstream. Have to cherry-pick it to downstream build.

Comment 7 Apeksha 2015-07-01 05:51:48 EDT

I now dont see the 100% CPU utilization, while IO going on on a ganesha volume :

top - 20:53:40 up 15 days,  1:23,  6 users,  load average: 1.90, 1.08, 0.55
Tasks: 281 total,   1 running, 280 sleeping,   0 stopped,   0 zombie
Cpu(s):  4.3%us,  5.2%sy,  0.0%ni, 83.8%id,  6.3%wa,  0.0%hi,  0.3%si,  0.1%st
Mem:   8059236k total,  2089396k used,  5969840k free,   183724k buffers
Swap:  2097148k total,        0k used,  2097148k free,  1008748k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                                                                                              
23462 root      20   0 2748m 189m 5792 S 17.6  2.4   0:48.20 ganesha.nfsd                                                                                                                                          
31383 root      20   0 1882m  49m 4264 S 10.0  0.6   0:35.34 glusterfsd

Comment 8 errata-xmlrpc 2015-07-29 01:03:20 EDT

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://rhn.redhat.com/errata/RHSA-2015-1495.html

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