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Date: Wed, 13 Mar 2002 16:28:57 -0800 (PST)
From: Greg Johnson <gjohnson@research.canon.com.au>
To: freebsd-gnats-submit@FreeBSD.org
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Subject: kern/35876: bus_dmamem_free does not call contigfree
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>Number:         35876
>Category:       kern
>Synopsis:       bus_dmamem_free does not call contigfree
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Mar 13 16:30:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Greg Johnson
>Release:        4.5-RELEASE
>Organization:
Canon Information Systems Research Australia
>Environment:
FreeBSD calvert.research.canon.com.au 4.5-RELEASE FreeBSD 4.5-RELEASE #4: Thu Feb 21 11:21:40 EST 2002     root@calvert.research.canon.com.au:/usr/obj/usr/src/sys/CALVERT  i386

>Description:
bus_dmamem_alloc calls contigmalloc when allocating memory that
is more than a single page in size.

bus_dmamem_free does nothing when freeing allocated memory that
is more than a single page in size. The memory remains wired and
does not get re-allocated.
>How-To-Repeat:
Allocate more than a page of memory using bus_dmamem_alloc the
try to free it using bus_dmamem_free. Note that amount of wired
memory before during and after.
>Fix:
Have bus_dmamem_free call contigfree for the case where the ammount
of memory is more that a single page.
>Release-Note:
>Audit-Trail:
>Unformatted:

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