On Fri, Sep 07, 2007 at 11:49:50AM -0700, Maxim Sobolev wrote: > Hi, > > On my 6.2 system I am seeing LOR discussed almost 1 year ago here: > > http://lists.freebsd.org/pipermail/freebsd-stable/2006-November/031048.html > http://lists.freebsd.org/pipermail/freebsd-stable/2006-December/031197.html > > lock order reversal: > 1st 0xc52cb500 kqueue (kqueue) @ kern/kern_event.c:1547 > 2nd 0xc4e4d80c struct mount mtx (struct mount mtx) @ > ufs/ufs/ufs_vnops.c:138 > > Do you have any plans to commit the suggested fix? I suspect that the LOR is bogus. I was never able to get the information where the reverse lock order happen. What I asked of the most reporters is to apply sys/kern/subr_witness.c rev. 1.222 to RELENG_6 and provide me with the LOR report, if any.
Note that doing that on RELENG_6_2 makes no sense, most likely you will get LORs with cdev mutex, fixed in RELENG_6.
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