Date: Tue, 27 Aug 2013 21:09:28 GMT From: Dominic Fandrey <kamikaze@bsdforen.de> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/181590: amd related vm_page_unwire panics Message-ID: <201308272109.r7RL9SoA030139@oldred.freebsd.org> Resent-Message-ID: <201308272110.r7RLA0in090663@freefall.freebsd.org>
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>Number: 181590 >Category: kern >Synopsis: amd related vm_page_unwire panics >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: Tue Aug 27 21:10:00 UTC 2013 >Closed-Date: >Last-Modified: >Originator: Dominic Fandrey >Release: stable/9 >Organization: private >Environment: FreeBSD mobileKamikaze.norad 9.2-PRERELEASE FreeBSD 9.2-PRERELEASE #0 r254957: Tue Aug 27 19:07:40 CEST 2013 root@mobileKamikaze.norad:/usr/obj/HP6510b-9/amd64/usr/src/sys/HP6510b-9 amd64 >Description: I have textdumps for two vm_page_unwire panics. The first one occurred while copying data from one msdosfs to another, both mounted through amd: http://pastebin.com/bVgmmcv1 The second one happened when SIGTERM was sent to amd, while there was heavy tmpfs load (building chromium). No file systems were mounted through amd at the time: http://pastebin.com/uqgMiGPc The second case is easy to reproduce, I have a 100% panic quota for this scenario. The core trouble is that the issue even occurs /after/ there was heavy tmpfs load in the past, while amd was running. Again without any actual mounts happening. So there is a panic for every system shutdown/reboot. >How-To-Repeat: Set WRKDIRPREFIX to a tmpfs (I do not know whether the tmpfs is necessary, but it certainly helps avoiding excessive filesystem damage). # cd /usr/ports/www/chromium # make Wait till the configure phase is over and the port is actually compiling. # service amd stop While chromium is still compiling. >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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