Date: Wed, 05 Aug 2015 08:10:14 -0600 From: Ian Lepore <ian@freebsd.org> To: parv <parv@bitter-almonds.com> Cc: freebsd-stable@freebsd.org Subject: Re: 8-stable crashing recently in ufsdirhash Message-ID: <1438783814.70393.138.camel@freebsd.org> In-Reply-To: <ED2C19BC-7F91-420E-B8B9-063AB53D3649@bitter-almonds.com> References: <ED2C19BC-7F91-420E-B8B9-063AB53D3649@bitter-almonds.com>
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On Tue, 2015-08-04 at 23:54 -1000, parv wrote: > Please CC me as I cannot properly use my laptop, Thinkpad X200 (i386). > > 8-stable has been crashing a lot since source update of Jul 2015[0]. After building debug kernel, kgdb shows lock reversal order & in ufsdirhash. File systems (/, var, misc) are all UFS, with var & misc having soft updates enabled. > > Crash had happened just after boot (during mktemp); when I tried to delete a directory (/misc/obj); when I tried to edit (vi /etc/fstab) so that / would be mounted readonly. Most recent crash ... > > http://imagebin.ca/v/2B50NARvIHsH > > Any clue would be appreciated. > > - parv > > > [0] crash also happened while svn was trying to update source of 8. Now "svn log" wants to connect to the remote repo instead of showing the current revision. > When you say you built a debug kernel, does that include option WITNESS_KDB? If so, remove that so you can find the real error. LORs related to ufs_dirhash have been reported for years, and nobody with the appropriate skills seems to be interested in fixing them; they just get declared to be harmless. (IMO the spewage related to this makes witness essentially useless.) -- Ian
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