Bug 64327 – kernel doesn't honor O_SYNC on open

Bug 64327 - kernel doesn't honor O_SYNC on open

Summary:	kernel doesn't honor O_SYNC on open

Status:	CLOSED CURRENTRELEASE

Aliases:	None

Product:	Red Hat Public Beta
Classification:	Retired
Component:	kernel (Show other bugs)
Sub Component:
Version:	pensacola
Hardware:	i386 Linux

Priority	medium Severity high
Target Milestone:	---
Target Release:	---
Assigned To:	Larry Woodman
QA Contact:	Brian Brock
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2002-05-02 11:01 EDT by David Mansfield
Modified:	2007-04-18 12:42 EDT (History)
CC List:	1 user (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2002-05-02 13:17:47 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description David Mansfield 2002-05-02 11:01:48 EDT

From Bugzilla Helper:
User-Agent: Mozilla/5.0 Galeon/1.2.0 (X11; Linux i686; U;) Gecko/20020308

Description of problem:
I have a test benchmark that I've been running on various systems.  When I run
it on pensacola, it scores about 1500% better, but it's because it isn't
honoring the O_SYNC on open.  I can verify this because: 

1) the score is the same with or without the flag
2) adding an fdatasync() call slows it down to the same level as
on other systems
3) I/O continues long after the process has terminated, and ps shows kupdated
doing the writing.


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


How reproducible:
Always

Steps to Reproduce:
1. open a file with O_SYNC and notice that it's not.
2.
3.
	

Actual Results:  asynchronous file writes

Expected Results:  synchronous file writes

Additional info:

Note You need to log in before you can comment on or make changes to this bug.