Date: Fri, 09 Apr 2004 06:26:25 -0500 From: Jon Noack <noackjr@alumni.rice.edu> To: Artem Koutchine <matrix@itlegion.ru> Cc: freebsd-current@freebsd.org Subject: Re: lock order reversal and swap problems Message-ID: <40768861.3000401@alumni.rice.edu> In-Reply-To: <000c01c41cbd$0399e330$0c00a8c0@artem> References: <000c01c41cbd$0399e330$0c00a8c0@artem>
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(bugs@ and hardware@ removed) Please read the following before posting again (including the appropriate list-specific sections): http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/eresources.html#ERESOURCES-CHARTERS On 4/7/2004 11:25 AM, Artem Koutchine wrote: > This evening, before going hove i decided to load-test the new server. > I remind the server is: > dual xeon 2.66, 2GB ECC ram, supermicro x5dpeg2 mb, > 3ware 8506-4LP sata radi controller, 4 sata seagate disks, > eveyrthing is install in a RAID5 array. > > I run: > 3 bonnies in a loop, > 4 byteneches in a loop, > 6 my own perl scripts to test the memory. Each allocated about 256MB > ran, fill it with somethingm then free and do it over and over again. > > After 3 minutes of running i saw this: > > Apr 7 20:16:34 new kernel: lock order reversal > Apr 7 20:16:34 new kernel: 1st 0xc79446b4 vm object (vm object) @ > /usr/src/sys/vm/swap_pager.c:1313 > Apr 7 20:16:35 new kernel: 2nd 0xc08b9e00 swap_pager swhash (swap_pager > swhash) @ /usr/src/sys/vm/swap_pager.c:1803 > Apr 7 20:16:35 new kernel: 3rd 0xc7898294 vm object (vm object) @ > /usr/src/sys/vm/uma_core.c:886 It's harmless. This is answered in more detail in a response to your second post on this topic. > and then hundreds and thousands: > > Apr 7 20:20:29 new kernel: swap_pager_getswapspace(16): failed > Apr 7 20:20:32 new last message repeated 44 times > > while actually there were 500MB of swap space left. > > What is going on? I don't know about this. Jon Noack
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