Date: Tue, 26 Jan 2010 18:33:37 +1100 From: Peter Jeremy <peterjeremy@acm.org> To: freebsd-stable@freebsd.org Subject: uma_zalloc_arg complaining about non-sleepable locks Message-ID: <20100126073336.GA1955@server.vk2pj.dyndns.org>
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--Nq2Wo0NMKNjxTN9z Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable I have just upgraded to 8-STABLE/amd64 from about 18 hours ago and am now getting regular (the following pair of messages about every minute) compaints as follows: kernel: uma_zalloc_arg: zone "mbuf" with the following non-sleepable locks = held: kernel: exclusive sleep mutex sp_lock (sp_lock) r =3D 0 (0xffffff000460bb00= ) locked @ /usr/src/sys/rpc/svc.c:1098 kernel: KDB: stack backtrace: kernel: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a kernel: _witness_debugger() at _witness_debugger+0x2c kernel: witness_warn() at witness_warn+0x2c2 kernel: uma_zalloc_arg() at uma_zalloc_arg+0x29d kernel: nfs_realign() at nfs_realign+0x5f kernel: fha_assign() at fha_assign+0x2d8 kernel: svc_run_internal() at svc_run_internal+0x1ee kernel: svc_thread_start() at svc_thread_start+0xb kernel: fork_exit() at fork_exit+0x112 kernel: fork_trampoline() at fork_trampoline+0xe kernel: --- trap 0xc, rip =3D 0x80069e04c, rsp =3D 0x7fffffffe6d8, rbp =3D = 0x5 --- kernel: uma_zalloc_arg: zone "mbuf" with the following non-sleepable locks = held: kernel: exclusive sleep mutex sp_lock (sp_lock) r =3D 0 (0xffffff000460bb00= ) locked @ /usr/src/sys/rpc/svc.c:1098 kernel: KDB: stack backtrace: kernel: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a kernel: _witness_debugger() at _witness_debugger+0x2c kernel: witness_warn() at witness_warn+0x2c2 kernel: uma_zalloc_arg() at uma_zalloc_arg+0x29d kernel: nfs_realign() at nfs_realign+0x5f kernel: fha_assign() at fha_assign+0x2d8 kernel: svc_run_internal() at svc_run_internal+0x1ee kernel: svc_thread_start() at svc_thread_start+0xb kernel: fork_exit() at fork_exit+0x112 kernel: fork_trampoline() at fork_trampoline+0xe kernel: --- trap 0xc, rip =3D 0x80069e04c, rsp =3D 0x7fffffffe6d8, rbp =3D = 0x5 --- It looks like NFS is missing some lock/unlock pairs. Has anyone else seen this? And does anyone have a fix? --=20 Peter Jeremy --Nq2Wo0NMKNjxTN9z Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (FreeBSD) iEYEARECAAYFAktemtAACgkQ/opHv/APuIc6pQCfegJtvPmH2gdGOzU1GyNPZLIu br0AoJt8Xl1fwKDdxL7bpISTKPdpmL9I =XAxq -----END PGP SIGNATURE----- --Nq2Wo0NMKNjxTN9z--
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