netbsd-bugs: port-xen/29851: CALLBACK_IN_BLOCKING

Subject: port-xen/29851: CALLBACK_IN_BLOCKING_CONTEXT callbacks can not block
To: None <port-xen-maintainer@netbsd.org, gnats-admin@netbsd.org,>
From: None <yamt@mwd.biglobe.ne.jp>
List: netbsd-bugs
Date: 04/01/2005 00:31:00

>Number:         29851
>Category:       port-xen
>Synopsis:       CALLBACK_IN_BLOCKING_CONTEXT callbacks can not block
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    port-xen-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Apr 01 00:31:00 +0000 2005
>Originator:     YAMAMOTO Takashi <yamt@mwd.biglobe.ne.jp>
>Release:        NetBSD 3.99.1
>Organization:

>Environment:
	
	
System: NetBSD kaeru 3.99.1 NetBSD 3.99.1 (build.kaeru.nodebug) #25: Fri Apr 1 08:28:25 JST 2005 takashi@kaeru:/home/takashi/work/kernel/build.kaeru.nodebug i386
Architecture: i386
Machine: i386
>Description:
	even with CALLBACK_IN_BLOCKING_CONTEXT,
	the callback will be called at softintr context.
	thus it can not block.
>How-To-Repeat:
	code inspection.
>Fix:
	introduce a dedicated thread.
	or
	implement and use task queueing framework like linux or freebsd.
	or
	finish kcont and use it.

>Unformatted: