Date: Sat, 03 Jul 2004 02:40:05 -0500 From: Jon Noack <noackjr@alumni.rice.edu> To: Nate Lawson <nate@root.org> Cc: current@freebsd.org Subject: Re: LoR in slab allocator and swapper Message-ID: <40E662D5.8070009@alumni.rice.edu> In-Reply-To: <20040703000302.T58868@root.org> References: <20040703000302.T58868@root.org>
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On 07/03/04 02:04, Nate Lawson wrote: > Just in case no one has reported this one: > > [...] > lock order reversal > 1st 0xc1a31108 vm object (vm object) @ /usr/src/sys/vm/swap_pager.c:1313 > 2nd 0xc08c6300 swap_pager swhash (swap_pager swhash) @ /usr/src/sys/vm/swap_pager.c:1799 > 3rd 0xc103fce4 vm object (vm object) @ /usr/src/sys/vm/uma_core.c:923 Yeah, it's been reported a few dozen times. It's a false positive and is harmless. See #1 on the LOR status page: http://sources.zabbadoz.net/freebsd/lor.html We're working on getting a new FAQ entry for LORs (http://www.freebsd.org/cgi/query-pr.cgi?pr=68595) which will have a pointer to the LOR status page given above. Once this is done, the idea is to update the lock order reversal message to point to this FAQ entry so we can better educate users on LORs and eliminate people reporting the same LOR tons of times. Jon
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