dcache warning d_set_d_op+0x7c/0xb0()

[rjeschmi]

There have been some similar issues noted, but just thought I'd report this one since the code seems to be different:

[603771.735266] ------------[ cut here ]------------
[603771.735281] WARNING: at /build/buildd/linux-3.2.0/fs/dcache.c:1287 d_set_d_op+0x7c/0xb0()
[603771.735284] Hardware name: X9DRH-7TF/7F/iTF/iF
[603771.735286] Modules linked in: ebt_arp ebt_redirect ebt_ip ip6table_filter ip6_tables ebtable_nat ebtables xt_conntrack ipt_MASQUERADE xt_state ipt_REJECT xt_CHECKSUM iptable_mangle iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack xt_tcpudp nf_defrag_ipv4 iptable_filter ip_tables x_tables kvm_intel kvm nbd autofs4 ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi vesafb bridge stp mei(C) ioatdma dm_multipath sb_edac edac_core acpi_pad joydev mac_hid lp parport nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc zfs(P) zcommon(P) znvpair(P) zavl(P) zunicode(P) spl(O) zlib_deflate usbhid ses hid enclosure uas usb_storage raid10 raid456 async_pq async_xor xor async_memcpy async_raid6_recov mpt2sas isci libsas scsi_transport_sas igb e1000e dca raid_class raid6_pq async_tx raid1 raid0 multipath linear
[603771.735563] Pid: 25766, comm: smbd Tainted: P C O 3.2.0-29-generic #46-Ubuntu
[603771.735570] Call Trace:
[603771.735589] [] warn_slowpath_common+0x7f/0xc0
[603771.735629] [] warn_slowpath_null+0x1a/0x20
[603771.735642] [] d_set_d_op+0x7c/0xb0
[603771.735656] [] simple_lookup+0x3f/0x60
[603771.735668] [] d_alloc_and_lookup+0x45/0x90
[603771.735682] [] ? d_lookup+0x35/0x60
[603771.735694] [] do_lookup+0x202/0x310
[603771.735705] [] path_lookupat+0x11c/0x750
[603771.735731] [] ? __strncpy_from_user+0x27/0x60
[603771.735743] [] do_path_lookup+0x31/0xc0
[603771.735755] [] user_path_at_empty+0x59/0xa0
[603771.735822] [] ? zpl_snapdir_getattr+0xff/0x110 [zfs]
[603771.735846] [] ? _raw_spin_lock+0xe/0x20
[603771.735861] [] ? cp_new_stat+0xf8/0x110
[603771.735873] [] user_path_at+0x11/0x20
[603771.735885] [] vfs_fstatat+0x3a/0x70
[603771.735897] [] vfs_stat+0x1b/0x20
[603771.735908] [] sys_newstat+0x1a/0x40
[603771.735922] [] system_call_fastpath+0x16/0x1b
[603771.735931] ---[ end trace 72225951f11cd9a3 ]---
[603771.735937] ------------[ cut here ]------------
[603771.735946] WARNING: at /build/buildd/linux-3.2.0/fs/dcache.c:1291 d_set_d_op+0x9f/0xb0()
[603771.735954] Hardware name: X9DRH-7TF/7F/iTF/iF
[603771.735961] Modules linked in: ebt_arp ebt_redirect ebt_ip ip6table_filter ip6_tables ebtable_nat ebtables xt_conntrack ipt_MASQUERADE xt_state ipt_REJECT xt_CHECKSUM iptable_mangle iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack xt_tcpudp nf_defrag_ipv4 iptable_filter ip_tables x_tables kvm_intel kvm nbd autofs4 ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi vesafb bridge stp mei(C) ioatdma dm_multipath sb_edac edac_core acpi_pad joydev mac_hid lp parport nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc zfs(P) zcommon(P) znvpair(P) zavl(P) zunicode(P) spl(O) zlib_deflate usbhid ses hid enclosure uas usb_storage raid10 raid456 async_pq async_xor xor async_memcpy async_raid6_recov mpt2sas isci libsas scsi_transport_sas igb e1000e dca raid_class raid6_pq async_tx raid1 raid0 multipath linear
[603771.736456] Pid: 25766, comm: smbd Tainted: P WC O 3.2.0-29-generic #46-Ubuntu
[603771.736467] Call Trace:
[603771.736482] [] warn_slowpath_common+0x7f/0xc0
[603771.736495] [] warn_slowpath_null+0x1a/0x20
[603771.736508] [] d_set_d_op+0x9f/0xb0
[603771.736520] [] simple_lookup+0x3f/0x60
[603771.736532] [] d_alloc_and_lookup+0x45/0x90
[603771.736545] [] ? d_lookup+0x35/0x60
[603771.736558] [] do_lookup+0x202/0x310
[603771.736570] [] path_lookupat+0x11c/0x750
[603771.736583] [] ? __strncpy_from_user+0x27/0x60
[603771.736594] [] do_path_lookup+0x31/0xc0
[603771.736606] [] user_path_at_empty+0x59/0xa0
[603771.736649] [] ? zpl_snapdir_getattr+0xff/0x110 [zfs]
[603771.736661] [] ? _raw_spin_lock+0xe/0x20
[603771.736674] [] ? cp_new_stat+0xf8/0x110
[603771.736686] [] user_path_at+0x11/0x20
[603771.736698] [] vfs_fstatat+0x3a/0x70
[603771.736710] [] vfs_stat+0x1b/0x20
[603771.736722] [] sys_newstat+0x1a/0x40
[603771.736735] [] system_call_fastpath+0x16/0x1b
[603771.736743] ---[ end trace 72225951f11cd9a4 ]---

[behlendorf]

This was resolved.