Hi, I'm doing some testing which involves roughly the following: o mount a file system on the server o start the nfs service - mount the nfs-exported file system from a client - perform a dd from the client - umount the nfs-exported file system from a client o stop the nfs service o unmount the file system on the server After several iterations of this, varying the number of nfsd threads started, I get the attached backtrace. I've reproduced it twice, now. Let me know if I can be of further help. Cheers, Jeff ------------[ cut here ]------------ WARNING: at lib/list_debug.c:26 __list_add+0x42/0x87() list_add corruption. next->prev should be prev (ffffffffa044fcc0), but was fffff fffa0494b50. (next=ffffffffa0494b50). Modules linked in: nfsd lockd nfs_acl auth_rpcgss exportfs bridge stp bnep rfcom m l2cap bluetooth sunrpc iptable_filter ip_tables ip6table_filter ip6_tables x_t ables ipv6 loop dm_round_robin dm_multipath sg sd_mod crc_t10dif qla2xxx ipmi_si ide_cd_mod pcspkr ipmi_msghandler bnx2 cdrom scsi_transport_fc serio_raw shpchp button cciss scsi_mod dm_snapshot dm_zero dm_mirror dm_region_hash dm_log dm_mo d ext3 jbd uhci_hcd ohci_hcd ehci_hcd [last unloaded: microcode] Pid: 7076, comm: rpc.nfsd Tainted: G W 2.6.28-rc3 #51 Call Trace: [<ffffffff8023ca74>] warn_slowpath+0xae/0xd5 [<ffffffff802b036e>] ? kfree_debugcheck+0x11/0x2c [<ffffffff802b036e>] ? kfree_debugcheck+0x11/0x2c [<ffffffff802b036e>] ? kfree_debugcheck+0x11/0x2c [<ffffffff802b040a>] ? cache_free_debugcheck+0x81/0x238 [<ffffffffa0058ee1>] ? ext3_htree_free_dir_info+0x19/0x1d [ext3] [<ffffffff8032c2b4>] ? selinux_file_free_security+0x1e/0x20 [<ffffffff802b903d>] ? __fput+0x19e/0x1ab [<ffffffff803638e3>] __list_add+0x42/0x87 [<ffffffffa0446629>] locks_start_grace+0x2e/0x41 [lockd] [<ffffffffa04764d7>] nfs4_state_start+0x94/0x106 [nfsd] [<ffffffffa045e5df>] nfsd_svc+0x6a/0x111 [nfsd] [<ffffffffa045f2d9>] ? write_threads+0x0/0xb4 [nfsd] [<ffffffffa045f343>] write_threads+0x6a/0xb4 [nfsd] [<ffffffff804e30b5>] ? _spin_unlock+0x30/0x4b [<ffffffff802d12d1>] ? simple_transaction_get+0x53/0xbf [<ffffffff802d1320>] ? simple_transaction_get+0xa2/0xbf [<ffffffffa045ea0c>] nfsctl_transaction_write+0x4c/0x7e [nfsd] [<ffffffff802b6362>] ? fd_install+0x30/0x5f [<ffffffff802b85b4>] vfs_write+0xae/0x137 [<ffffffff802b8701>] sys_write+0x47/0x70 [<ffffffff8020c00b>] system_call_fastpath+0x16/0x1b ---[ end trace 4eaa2a86a8e2da22 ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
