Date: Sun, 18 May 2003 16:09:48 -0700 From: David Schultz <das@FreeBSD.ORG> To: Giorgos Keramidas <keramida@ceid.upatras.gr> Cc: current@FreeBSD.ORG Subject: Re: Panic with swap-backed md devices Message-ID: <20030518230948.GA3465@HAL9000.homeunix.com> In-Reply-To: <20030518104943.GA35028@gothmog.gr> References: <20030514232428.GA731@gothmog.gr> <20030518053557.GA223@HAL9000.homeunix.com> <20030518104943.GA35028@gothmog.gr>
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On Sun, May 18, 2003, Giorgos Keramidas wrote: > On 2003-05-17 22:35, David Schultz <das@FreeBSD.org> wrote: > > On Thu, May 15, 2003, Giorgos Keramidas wrote: > > > Trying to create and destroy a swap-backed md device results in panics > > > with today's CURRENT. I was trying to make a new -t swap md disk to > > > test the problem described in a PR. Using the following small shell > > > script I noticed that it always causes a panic when mdconfig -d is run: > > > > > > mdconfig -a -t swap -s 100m -u 10 > > > disklabel -r -w md10 auto > > > newfs -O 1 -b 8192 -s 1024 md10 > > > mount /dev/md10 /mnt > > > mount > > > umount /mnt > > > mount > > > mdconfig -d -u 10 > > > > The following patch should fix the panic, but there's a small > > vm_object leak that's still unfixed. I'll look into that. > > Thanks :) > I'm CVSup'ing now and will build a kernel to test it in 1-2 hours. Actually alc fixed it in src/sys/dev/md/md.c,v1.99, along with the leak. Apparently it's intentional that vm_pager_deallocate() is not the inverse of vm_pager_allocate(). :-O
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