Date: Thu, 21 Mar 2013 11:33:20 GMT From: Fabian Keil <fk@fabiankeil.de> To: freebsd-gnats-submit@FreeBSD.org Subject: docs/177188: dumpon(8) unaware of mini crash dumps Message-ID: <201303211133.r2LBXKJP003112@red.freebsd.org> Resent-Message-ID: <201303211140.r2LBe2hZ059919@freefall.freebsd.org>
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>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 fk@r500.local:/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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