From owner-cvs-all  Sun Jan 28 11: 9:29 2001
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Date: Sun, 28 Jan 2001 11:05:51 -0800 (PST)
From: Matthew Jacob <mjacob@feral.com>
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To: Poul-Henning Kamp <phk@critter.freebsd.dk>
Cc: John Baldwin <jhb@FreeBSD.org>, cvs-all@FreeBSD.org,
	cvs-committers@FreeBSD.org, Mikhail Teterin <mi@aldan.algebra.com>
Subject: Re: cvs commit: src/sys/i386/conf GENERIC 
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Nawp. Even w/o mount -o async.

Not Ready For Prime Time. I'd like MFS back, please :-)....


On Sun, 28 Jan 2001, Matthew Jacob wrote:

> 
> Nope.
> 
> lmdd of=file 
> 
> in this /tmp got me:
> 
> panic: lockmgr: pid 78175, not exclusive lock holder 5 unlocking
> panic
> Stopped at      Debugger+0x2c:  ldq     ra,0(sp) <0xfffffe000a2576a0>
> <ra=0xfffffc0000524000,sp=0xfffffe000a2576a0>
> db> t
> Debugger() at Debugger+0x2c
> panic() at panic+0x100
> lockmgr() at lockmgr+0x534
> brelse() at brelse+0xa20
> bufdone() at bufdone+0x4a0
> bufdonebio() at bufdonebio+0x1c
> swap_pager_strategy() at swap_pager_strategy+0x114
> vm_pager_strategy() at vm_pager_strategy+0x40
> mdstart_swap() at mdstart_swap+0x11c
> mdstrategy() at mdstrategy+0x128
> diskstrategy() at diskstrategy+0x150
> spec_strategy() at spec_strategy+0x224
> spec_vnoperate() at spec_vnoperate+0x2c
> ufs_strategy() at ufs_strategy+0x140
> ufs_vnoperate() at ufs_vnoperate+0x2c
> bwrite() at bwrite+0x390
> vop_stdbwrite() at vop_stdbwrite+0x1c
> vop_defaultop() at vop_defaultop+0x2c
> ufs_vnoperate() at ufs_vnoperate+0x2c
> bawrite() at bawrite+0x48
> cluster_wbuild() at cluster_wbuild+0x6a8
> cluster_write() at cluster_write+0x438
> ffs_write() at ffs_write+0x500
> vn_write() at vn_write+0x21c
> dofilewrite() at dofilewrite+0x130
> write() at write+0x5c
> syscall() at syscall+0x2d4
> XentSys1() at XentSys1+0x10
> db> 
> 
> Maybe the 'mount -o async' is the culprit. Hmm. Never had this kind of trouble
> with MFS.....
> 
> 
> On Sun, 28 Jan 2001, Matthew Jacob wrote:
> 
> > 
> > > >> One should use md(4) and mdconfig(8) rather than MFS nowadays anyways, which
> > > >> does work with DEVFS.
> > > >
> > > >Uh, I don't think so. MFS should be fixed. With MFS you should be able to take
> > > >advantage of VM. I don't think the same applies to md.
> > > 
> > > Try it, and come back with numbers if you think it is worse...
> > 
> > Can't really compare right now, now can I, if MFS is broken ... :-)...
> > 
> > But seriously, I'll be using md a lot from now on and I'll let you know if it
> > seems broken.... Like I said in other mail (paraphrasing) "Seems like this
> > ought to be a VFS, but I don't really care"
> > 
> > 
> > 
> > 
> 
> 



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