Subject: Re: panic: ubc_fault: concurrent writes
To: Current Users <current-users@NetBSD.ORG>
From: Chuck Silvers <>
List: current-users
Date: 02/03/2001 07:59:28
hi jukka,

this is a known problem.  NFS doesn't do vnode locking, but with UBC
all filesystems are required to do vnode locking, at least for
VOP_READ() and VOP_WRITE() (ie. the VOPs which use ubc_alloc()).


On Thu, Feb 01, 2001 at 08:42:51AM +0200, Jukka Marin wrote:
> Under 1.5Q:
> panic: ubc_fault: concurrent writes vp 0xd3e4aef4
> Is this a known problem or should I examine the core file somehow?
>   -jm