Date: Fri, 1 Jan 2010 19:32:53 +0100 From: Attilio Rao <attilio@freebsd.org> To: Lucius Windschuh <lwindschuh@googlemail.com> Cc: Kostik Belousov <kostikbel@gmail.com>, Peter Holm <pho@freebsd.org>, current@freebsd.org Subject: Re: NFS panic: ^C on cp Message-ID: <3bbf2fe11001011032hd292d57q1225db2ad9629326@mail.gmail.com> In-Reply-To: <90a5caac0912291525k25210016ib7d45be088c162b9@mail.gmail.com> References: <90a5caac0912291525k25210016ib7d45be088c162b9@mail.gmail.com>
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2009/12/30 Lucius Windschuh <lwindschuh@googlemail.com>: > Hi, > I'm using CURRENT r201138 and attending the 26C3, where we have access > to a NetApp filer (nfs://81.163.130.102/vol/fast, may work also for > external IPs). > It works well. But the following command sequence results with high > probability, not always, in a panic: > # mount_nfs -o nfsv3,rsize=3D32768,wsize=3D32768,intr 81.163.130.102:/vol= /fast /mnt > # cd /mnt/ > # cp some_large_file /some/where/local/ > (wait a while) > ^C > (panic: Assertion lk->lk_exslpfail =3D=3D 0 failed at > /usr/src/sys/kern/kern_lock.c:962) > > I > Backtrace: > Tracing pid 2754 tid 100209 td 0xc7580240 > kdb_enter(c09ec974,c09ec974,c09c2936,eb402af4,1,...) at kdb_enter+0x3a > panic(c09c2936,c09e9af9,c09e98f2,3c2,c6511030,...) at panic+0x136 > __lockmgr_args(daf26180,100000,0,0,0,...) at __lockmgr_args+0xe50 > bqrelse(daf26120,0,c09f7b16,d3e,eb402c54,...) at bqrelse+0x44a > bufdone_finish(daf26120,daf26120,daf26120,0,eb402cbc,...) at > bufdone_finish+0x3ff > bufdone(daf26120,eb402c80,c8119080,eb402cbc,c06c7795,...) at bufdone+0x6a > nfs_doio(c8de7440,daf26120,c8119080,0,3c00,...) at nfs_doio+0x67b > nfssvc_iod(c0c23f80,eb402d38,c09e7dea,343,c7df3000,...) at nfssvc_iod+0x2= 7c > fork_exit(c0878520,c0c23f80,eb402d38) at fork_exit+0xb8 > fork_trampoline() at fork_trampoline+0x8 > --- trap 0, eip =3D 0, esp =3D 0xeb402d70, ebp =3D 0 --- > > With PID =C2=A02754 being: [nfsiod 0] Lucius, may you be willing to test this patch and re-create the test case please?: http://www.freebsd.org/~attilio/lockmgr_fix.diff Thanks, Attilio --=20 Peace can only be achieved by understanding - A. Einstein
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