Date: Sun, 21 Jun 2009 13:10:55 +0100 From: Kris Kennaway <kris@FreeBSD.org> To: John Baldwin <jhb@freebsd.org> Cc: Doug Rabson <dfr@freebsd.org>, freebsd-current@freebsd.org, pav@freebsd.org, current@freebsd.org, Kip Macy <kmacy@freebsd.org> Subject: hang in rpccon from interrupting NFS operations (Re: pointyhat panic) Message-ID: <4A3E234F.6050403@FreeBSD.org> In-Reply-To: <200906160812.04284.jhb@freebsd.org> References: <1242075474.72992.118.camel@hood.oook.cz> <3c1674c90906151408n6febec56m140b089b694f6e13@mail.gmail.com> <20090616073353.GZ33280@droso.net> <200906160812.04284.jhb@freebsd.org>
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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@ 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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