>Number: 177188
>Category: docs
>Synopsis: dumpon(8) unaware of mini crash dumps
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-doc
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: doc-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Mar 21 11:40:01 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator: Fabian Keil
>Release: HEAD
>Organization:
>Environment:
FreeBSD r500.local 10.0-CURRENT FreeBSD 10.0-CURRENT #555 r+5b01145: Wed Mar 20
22:01:58 CET 2013 [email protected]:/usr/obj/usr/src/sys/ZOEY amd64
>Description:
dumpon(8) currently states:
| The dumpon utility will refuse to enable a dump device which is smaller
| than the total amount of physical memory as reported by the hw.physmem
| sysctl(8) variable.
If mini crash dumps are enabled smaller dump devices are actually accepted.
It might also be worth mentioning that with mini crash dumps disabled no error
message is printed unless -v is used.
>How-To-Repeat:
fk@r500 ~ $sysctl debug.minidump
debug.minidump: 1
fk@r500 ~ $sysctl kern.shutdown.dumpdevname
kern.shutdown.dumpdevname:
fk@r500 ~ $sysctl hw.physmem
hw.physmem: 2070306816
fk@r500 ~ $diskinfo -v /dev/da0 | grep bytes
750780416 # mediasize in bytes (716M)
fk@r500 ~ $sudo dumpon /dev/da0
fk@r500 ~ $echo $?
0
fk@r500 ~ $sysctl kern.shutdown.dumpdevname
kern.shutdown.dumpdevname: da0
fk@r500 ~ $sudo dumpon off
fk@r500 ~ $sudo sysctl debug.minidump=0
debug.minidump: 1 -> 0
fk@r500 ~ $sudo dumpon /dev/da0
fk@r500 ~ $echo $?
74
fk@r500 ~ $sudo dumpon -v /dev/da0
/dev/da0 is smaller than physical memory
>Fix:
Update the man page.
>Release-Note:
>Audit-Trail:
>Unformatted:
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