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Date: Wed, 13 Apr 2005 12:57:41 -0700
From: Alfred Perlstein <alfred@freebsd.org>
To: Jeff Roberson <jeff@FreeBSD.org>
Message-ID: <20050413195741.GE60345@elvis.mu.org>
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Subject: Re: cvs commit: src/sys/coda coda_vnops.c src/sys/compat/linux
	linux_getcwd.c src/sys/fs/devfs devfs_vnops.c src/sys/fs/hpfs
	hpfs_vnops.c src/sys/fs/msdosfs msdosfs_lookup.c src/sys/fs/nwfs
	nwfs_vnops.c src/sys/fs/pseudofs pseudofs_vnops.c src/sys/fs/smbfs
	...
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* Jeff Roberson <jeff@FreeBSD.org> [050413 03:59] wrote:
> jeff        2005-04-13 10:59:10 UTC
> 
>   FreeBSD src repository
> 
>   Modified files:
>     sys/coda             coda_vnops.c 
>     sys/compat/linux     linux_getcwd.c 
>   Log:
>    - Change all filesystems and vfs_cache to relock the dvp once the child is
>      locked in the ISDOTDOT case.  Se vfs_lookup.c r1.79 for details.

Sorry to bumble into your way, but can you explain this?  I thought
the lock order was always dvp->vp, doing a vp->dvp lock is a reversal
and can cause deadlock.  I guess I'm missing something, can you explain
please?

-- 
- Alfred Perlstein
- email: bright@mu.org cell: 408-480-4684