Date: Thu, 17 Nov 2005 03:23:09 -0800 (PST) From: Rob <spamrefuse@yahoo.com> To: freebsd-stable@freebsd.org Subject: Re: Swapfile problem in 6? Message-ID: <20051117112309.39452.qmail@web36201.mail.mud.yahoo.com>
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Peter Jeremy wrote: > On Thu, 2005-Nov-17 00:00:03 -0800, Rob wrote: > >>The only way I know of how to trigger the deadlock, is to compile >>a new kernel and the 'linking kernel' stage will lock-up the PC. >>With a regular kernel, this takes 2.5 hours until deadlock, but with >>a fully equipped debug kernel it takes about 8 hours.... > > > When the first deadlock occurs, you have a fully populated set of kernel > objects (though possibly some of them are in the buffer case rather than > on disk). You should be able to quickly reproduce the panic by running: > # cd /usr/obj/usr/src/sys/<<KERNEL>> > # make I'm doing this right now... Although I have not got into the deadlock yet, I do get these lines in the serial console: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 12333, size: 4096 swap_pager: indefinite wait buffer: bufobj: 0, blkno: 22990, size: 4096 swap_pager: indefinite wait buffer: bufobj: 0, blkno: 22928, size: 4096 swap_pager: indefinite wait buffer: bufobj: 0, blkno: 22625, size: 8192 swap_pager: indefinite wait buffer: bufobj: 0, blkno: 22990, size: 4096 swap_pager: indefinite wait buffer: bufobj: 0, blkno: 22784, size: 8192 swap_pager: indefinite wait buffer: bufobj: 0, blkno: 23233, size: 4096 swap_pager: indefinite wait buffer: bufobj: 0, blkno: 23404, size: 4096 swap_pager: indefinite wait buffer: bufobj: 0, blkno: 23154, size: 4096 A typical snapshot of 'swapinfo' at this time is: Device 1K-blocks Used Avail Capacity /dev/ad0s1b 39848 39840 39848 100% /dev/md0 131072 54136 131072 41% Total 170920 93976 76944 55% (By the way, notice that the 'Avail' column of /dev/ad0s1b and /dev/md0 is wrong; for Total it's correct. Is this a general bug in 6 or only on my PC? ) Googling on the above swap_pager lines, I found this conversation: http://lists.freebsd.org/pipermail/freebsd-current/2005-September/055550.html which claims that DragonFly has fixed this problem. Regards, Rob. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
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