Bug 636053

Summary:	read from virtio-serial returns if the host side is not connect to pipe
Product:	Red Hat Enterprise Linux 5	Reporter:	Amit Shah <amit.shah>
Component:	kernel	Assignee:	Amit Shah <amit.shah>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	low
Version:	5.6	CC:	bazulay, ghammer, llim, mkenneth, tburke, virt-maint
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:	624628	Environment:
Last Closed:	2011-01-13 21:21:25 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	624628
Bug Blocks:	568128, 580954

Comment 1 RHEL Program Management 2010-09-21 13:09:13 UTC

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.

Comment 2 Amit Shah 2010-09-28 15:35:27 UTC

Note for QE: to test this patch, open a port in the guest, using the fcntl syscall, set the O_ASYNC flag for the file and then open/close host connection.  The SIGIO signal should be received each time the host-side connection state is modified.

See

http://fedorapeople.org/gitweb?p=amitshah/public_git/test-virtserial.git;a=commitdiff;h=f50f751a4980447a465e5039272ae0b0d8708aed

for code that does this.

Comment 4 Jarod Wilson 2010-10-14 14:03:48 UTC

in kernel-2.6.18-227.el5
You can download this test kernel (or newer) from http://people.redhat.com/jwilson/el5

Detailed testing feedback is always welcomed.

Comment 7 errata-xmlrpc 2011-01-13 21:21:25 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0017.html