From owner-freebsd-fs  Sun Oct 25 01:53:53 1998
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Date: Sun, 25 Oct 1998 18:53:50 +0900 (JST)
From: Michael Hancock <michaelh@cet.co.jp>
To: Love <lha@s3.kth.se>
cc: freebsd-fs@FreeBSD.ORG, freebsd-bugs@FreeBSD.ORG, kom-arla@stacken.kth.se
Subject: Re: deadfs in FreeBSD 3.0/current ?
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The wakeup at the bottom of vclean()?  That code also clears VXLOCK.

Regards,

Mike

On Sun, 25 Oct 1998, Love wrote:

> 
> Hello
> 
> kern/vfs_subr.c:vclean() does a vp->v_flag |= VXLOCK; and after that
> "calls" VOP_LOCK().
> 
> Now when the filesystem is deadfs (we use it in arla[1]), the call
> ends up in miscfs/deadfs/dead_vnops.c:dead_lock() that calls
> chkvnlock(). Now chkvnlock() sleeps when VXLOCK is set.
> 
> Who will wake us up ?
> 
> Love,
> arla-drinker
> 
> [1] arla, a free afs-clone <http://www.stacken.kth.se/project/arla/>
> 
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