Date: Wed, 2 Apr 1997 13:15:08 -0600 From: Karl Denninger <karl@Mcs.Net> To: Terry Lambert <terry@lambert.org> Cc: ??????????????? <ache@nagual.ru>, dyson@FreeBSD.ORG, bde@zeta.org.au, current@FreeBSD.ORG Subject: Re: ufs lock panic in -current Message-ID: <19970402131508.59503@Jupiter.Mcs.Net> In-Reply-To: <199704021828.LAA14010@phaeton.artisoft.com>; from Terry Lambert on Wed, Apr 02, 1997 at 11:28:05AM -0700 References: <Pine.BSF.3.96.970402080704.271A-100000@nagual.ru> <199704021828.LAA14010@phaeton.artisoft.com>
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On Wed, Apr 02, 1997 at 11:28:05AM -0700, Terry Lambert wrote: > > I just got following panic: > > > > lockmgr: locking against myself > > > > stack looks like: > > > > lockmgr > > ufs_lock > > vn_lock > > vputrele > > vrele > > vnode_pager_dealloc > > vm_pager_deallocate > > vm_pager_terminate > > vm_object_deallocate > > vputrele > > vrele > > execve > > > > Please, fix. > > The fix is conceptually non-trivial, and requires that the transitive > closure be calculated at the same layer for all FS's. This implies a > veto, rather than a call-down, interface for VOP_LOCK. > > Physically, the fix is about 200 lines of code, including all FS > code changes. > > > Regards, > Terry Lambert > terry@lambert.org Am I correct in understanding that this isn't fixed yet, and that also the NFS exec() problems with paging are also still open? I'm sorry about not being more up-to-date on this; I've been INSANELY busy the last few weeks, and haven't had time to dig into the NFS layer. Is it still as it was? (BTW, its easy to test -- a loopback mount from the same machine will fail just as hard as one over a real wire). -- -- Karl Denninger (karl@MCS.Net)| MCSNet - The Finest Internet Connectivity http://www.mcs.net/~karl | T1's from $600 monthly to FULL DS-3 Service | 99 Analog numbers, 77 ISDN, http://www.mcs.net/ Voice: [+1 312 803-MCS1 x219]| NOW Serving 56kbps DIGITAL on our analog lines! Fax: [+1 312 803-4929] | 2 FULL DS-3 Internet links; 400Mbps B/W Internal
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