Re: hang in rpccon from interrupting NFS operations (Re: pointyhat panic)

From: Kris Kennaway <kris_at_FreeBSD.org>
Date: Sun, 21 Jun 2009 13:16:58 +0100
Kris Kennaway wrote:
> John Baldwin wrote:
>> On Tuesday 16 June 2009 3:33:55 am Erwin Lansing wrote:
>>> On Mon, Jun 15, 2009 at 02:08:17PM -0700, Kip Macy wrote:
>>>> This is from the RPC re-work. I had thought that this was fixed. You
>>>> shouldn't see this on the latest -CURRENT, but Doug will have more
>>>> details.
>>> Any datepoint when these fixes went in?  I upgraded pointyhat last month
>>> exactly to get the latest fixes in, but could be there were more since
>>> then.
>>
>> You want the socket upcall locking changes in 193272 (committed June 
>> 1).  You will also want subsequent commits to the RPC and NFS code by 
>> Rick Macklem to close a few more races.  I think Rick still has one 
>> other patch that pho_at_ is stress testing as well.
>>
> 
> Got another deadlock after upgrading.  Again, busy NFS volume, and 
> ^C'ing a recursive find hung in rpccon state:
> 
> db> bt 89596
> Tracing pid 89596 tid 102493 td 0xffffff0089260000
> sched_switch() at sched_switch+0x17c
> mi_switch() at mi_switch+0x21d
> sleepq_switch() at sleepq_switch+0x123
> sleepq_timedwait() at sleepq_timedwait+0x4d
> _sleep() at _sleep+0x301
> clnt_reconnect_call() at clnt_reconnect_call+0x5d3
> nfs_request() at nfs_request+0x225
> nfs_statfs() at nfs_statfs+0x197
> __vfs_statfs() at __vfs_statfs+0x28
> kern_fstatfs() at kern_fstatfs+0x286
> fstatfs() at fstatfs+0x34
> syscall() at syscall+0x1af
> Xfast_syscall() at Xfast_syscall+0xd0
> --- syscall (397, FreeBSD ELF64, fstatfs), rip = 0x800726dcc, rsp = 
> 0x7fffffffe1a8, rbp = 0x1000 ---
> 
> These are mounted with intr, I'll try disabling that next.
> 
> Kris
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Received on Sun Jun 21 2009 - 10:17:00 UTC

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