Hi, I am not sure this is a right mailing list to report the errors regarding NFsv4 client. I am running Centos 5.3 NFSv4 client against Solaris 10 (x86 64 bit architecture) NFS server. I received following coredump while running iozone benchmark for 2GB file size. I got this error in single client as well as multiple client scenario. After the initial dump, machine is extremely slow and I can see keyboard input after a minute. Here are the details of machine configuration: Distribution : Centos 5.3 kernel version : 2.6.18-128.el5 Here is the dump : Apr 13 19:57:10 localhost kernel: BUG: soft lockup - CPU#1 stuck for 10s! [192.168.0.104-r:3188] Apr 13 19:57:10 localhost kernel: CPU 1: Apr 13 19:57:10 localhost kernel: Modules linked in: nfs lockd fscache nfs_acl ipv6 xfrm_nalgo crypto_api autofs4 hidp rfcomm l2cap bluetooth sunrpc dm_mirror dm_multipath scsi_dh video hwmon backlight sbs i2c_ec i2c_core button battery asus_acpi acpi_memhotplug ac lp parport_pc parport serio_raw e752x_edac e1000 edac_mc pcspkr sg dm_raid45 dm_message dm_region_hash dm_log dm_mod dm_mem_cache ata_piix libata shpchp aacraid sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd Apr 13 19:57:10 localhost kernel: Pid: 3188, comm: 192.168.0.104-r Not tainted 2.6.18-128.el5 #1 Apr 13 19:57:10 localhost kernel: RIP: 0010:[<ffffffff8844d093>] [<ffffffff8844d093>] :nfs:nfs4_open_expired+0x90/0x16c Apr 13 19:57:10 localhost kernel: RSP: 0018:ffff810032da3e40 EFLAGS: 00000247 Apr 13 19:57:10 localhost kernel: RAX: 000000000001a002 RBX: 0000000000000000 RCX: 000000010019e262 Apr 13 19:57:10 localhost kernel: RDX: 0000000000000000 RSI: ffff81002b1989c0 RDI: ffff81003f395fd8 Apr 13 19:57:10 localhost kernel: RBP: ffff81003e9e29c0 R08: 0000000000000000 R09: ffff810037ddf080 Apr 13 19:57:10 localhost kernel: R10: ffff810030850250 R11: fffffffffffffeff R12: ffff810035de4b40 Apr 13 19:57:10 localhost kernel: R13: ffff81002b198ac0 R14: 0000000000000004 R15: ffffffff8843703e Apr 13 19:57:10 localhost kernel: FS: 0000000000000000(0000) GS:ffff810037d237c0(0000) knlGS:0000000000000000 Apr 13 19:57:10 localhost kernel: CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b Apr 13 19:57:10 localhost kernel: CR2: 00002aaaaacd3000 CR3: 000000003d95d000 CR4: 00000000000006e0 Apr 13 19:57:10 localhost kernel: Apr 13 19:57:10 localhost kernel: Call Trace: Apr 13 19:57:10 localhost kernel: [<ffffffff8009d909>] keventd_create_kthread+0x0/0xc4 Apr 13 19:57:10 localhost kernel: [<ffffffff884540b5>] :nfs:nfs4_reclaim_open_state+0x2d/0x150 Apr 13 19:57:10 localhost kernel: [<ffffffff8845437c>] :nfs:reclaimer+0x1a4/0x2ac Apr 13 19:57:10 localhost kernel: [<ffffffff884541d8>] :nfs:reclaimer+0x0/0x2ac Apr 13 19:57:10 localhost kernel: [<ffffffff80032360>] kthread+0xfe/0x132 Apr 13 19:57:10 localhost kernel: [<ffffffff8005dfb1>] child_rip+0xa/0x11 Apr 13 19:57:10 localhost kernel: [<ffffffff8009d909>] keventd_create_kthread+0x0/0xc4 Apr 13 19:57:10 localhost kernel: [<ffffffff80032262>] kthread+0x0/0x132 Apr 13 19:57:10 localhost kernel: [<ffffffff8005dfa7>] child_rip+0x0/0x11 Apr 13 19:57:10 localhost kernel: Apr 13 19:57:20 localhost kernel: BUG: soft lockup - CPU#1 stuck for 10s! [192.168.0.104-r:3188] Apr 13 19:57:20 localhost kernel: CPU 1: Apr 13 19:57:20 localhost kernel: Modules linked in: nfs lockd fscache nfs_acl ipv6 xfrm_nalgo crypto_api autofs4 hidp rfcomm l2cap bluetooth sunrpc dm_mirror dm_multipath scsi_dh video hwmon backlight sbs i2c_ec i2c_core button battery asus_acpi acpi_memhotplug ac lp parport_pc parport serio_raw e752x_edac e1000 edac_mc pcspkr sg dm_raid45 dm_message dm_region_hash dm_log dm_mod dm_mem_cache ata_piix libata shpchp aacraid sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd Apr 13 19:57:20 localhost kernel: Pid: 3188, comm: 192.168.0.104-r Not tainted 2.6.18-128.el5 #1 Apr 13 19:57:20 localhost kernel: RIP: 0010:[<ffffffff8014c625>] [<ffffffff8014c625>] __list_add+0x32/0x68 Apr 13 19:57:20 localhost kernel: RSP: 0018:ffff810032da3d80 EFLAGS: 00000246 Apr 13 19:57:20 localhost kernel: RAX: ffff81002b1989c0 RBX: ffff81002b1989c0 RCX: 000000010019e262 Apr 13 19:57:20 localhost kernel: RDX: ffff81002b1989c0 RSI: ffff81002b1989c0 RDI: ffff81003f395fd8 Apr 13 19:57:20 localhost kernel: RBP: ffffffff882dc746 R08: 0000000000000000 R09: ffff810037ddf080 Apr 13 19:57:20 localhost kernel: R10: ffff810030850250 R11: fffffffffffffeff R12: ffff8100308502f8 Apr 13 19:57:20 localhost kernel: R13: ffff810030850250 R14: ffff810006403e00 R15: ffff81003effac00 Apr 13 19:57:20 localhost kernel: FS: 0000000000000000(0000) GS:ffff810037d237c0(0000) knlGS:0000000000000000 Apr 13 19:57:20 localhost kernel: CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b Apr 13 19:57:20 localhost kernel: CR2: 00002aaaaacd3000 CR3: 000000003d95d000 CR4: 00000000000006e0 Apr 13 19:57:20 localhost kernel: Apr 13 19:57:20 localhost kernel: Call Trace: Apr 13 19:57:20 localhost kernel: [<ffffffff8843703e>] :nfs:nfs_access_get_cached+0xab/0xfa Apr 13 19:57:20 localhost kernel: [<ffffffff8844c2f9>] :nfs:_nfs4_do_access+0x2d/0x85 Apr 13 19:57:20 localhost kernel: [<ffffffff8844d06f>] :nfs:nfs4_open_expired+0x6c/0x16c Apr 13 19:57:20 localhost kernel: [<ffffffff8009d909>] keventd_create_kthread+0x0/0xc4 Apr 13 19:57:20 localhost kernel: [<ffffffff884540b5>] :nfs:nfs4_reclaim_open_state+0x2d/0x150 Apr 13 19:57:20 localhost kernel: [<ffffffff8845437c>] :nfs:reclaimer+0x1a4/0x2ac Apr 13 19:57:20 localhost kernel: [<ffffffff884541d8>] :nfs:reclaimer+0x0/0x2ac Apr 13 19:57:20 localhost kernel: [<ffffffff80032360>] kthread+0xfe/0x132 Apr 13 19:57:20 localhost kernel: [<ffffffff8005dfb1>] child_rip+0xa/0x11 Apr 13 19:57:20 localhost kernel: [<ffffffff8009d909>] keventd_create_kthread+0x0/0xc4 Apr 13 19:57:20 localhost kernel: [<ffffffff80032262>] kthread+0x0/0x132 Apr 13 19:57:20 localhost kernel: [<ffffffff8005dfa7>] child_rip+0x0/0x11 Apr 13 19:57:20 localhost kernel: Apr 13 19:57:30 localhost kernel: BUG: soft lockup - CPU#1 stuck for 10s! [192.168.0.104-r:3188] Apr 13 19:57:30 localhost kernel: CPU 1: Apr 13 19:57:30 localhost kernel: Modules linked in: nfs lockd fscache nfs_acl ipv6 xfrm_nalgo crypto_api autofs4 hidp rfcomm l2cap bluetooth sunrpc dm_mirror dm_multipath scsi_dh video hwmon backlight sbs i2c_ec i2c_core button battery asus_acpi acpi_memhotplug ac lp parport_pc parport serio_raw e752x_edac e1000 edac_mc pcspkr sg dm_raid45 dm_message dm_region_hash dm_log dm_mod dm_mem_cache ata_piix libata shpchp aacraid sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd Apr 13 19:57:30 localhost kernel: Pid: 3188, comm: 192.168.0.104-r Not tainted 2.6.18-128.el5 #1 Apr 13 19:57:30 localhost kernel: RIP: 0010:[<ffffffff8844c2d3>] [<ffffffff8844c2d3>] :nfs:_nfs4_do_access+0x7/0x85 Apr 13 19:57:30 localhost kernel: RSP: 0018:ffff810032da3e28 EFLAGS: 00000246 Apr 13 19:57:30 localhost kernel: RAX: 000000000001a002 RBX: 0000000000000000 RCX: 000000010019e262 Apr 13 19:57:30 localhost kernel: RDX: 0000000000000001 RSI: ffff81003e9e29c0 RDI: ffff81002b198ac0 Apr 13 19:57:30 localhost kernel: RBP: ffffffff8843703e R08: 0000000000000000 R09: ffff810037ddf080 Apr 13 19:57:30 localhost kernel: R10: ffff810030850250 R11: fffffffffffffeff R12: ffff81003f395fd8 Apr 13 19:57:30 localhost kernel: R13: ffff81002b198ac0 R14: ffff81003f395fc0 R15: 0000000000000246 Apr 13 19:57:30 localhost kernel: FS: 0000000000000000(0000) GS:ffff810037d237c0(0000) knlGS:0000000000000000 Apr 13 19:57:30 localhost kernel: CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b Apr 13 19:57:30 localhost kernel: CR2: 00002aaaaacd3000 CR3: 000000003d95d000 CR4: 00000000000006e0 Apr 13 19:57:30 localhost kernel: Apr 13 19:57:30 localhost kernel: Call Trace: Apr 13 19:57:30 localhost kernel: [<ffffffff8844d06f>] :nfs:nfs4_open_expired+0x6c/0x16c Apr 13 19:57:30 localhost kernel: [<ffffffff8009d909>] keventd_create_kthread+0x0/0xc4 Apr 13 19:57:30 localhost kernel: [<ffffffff884540b5>] :nfs:nfs4_reclaim_open_state+0x2d/0x150 Apr 13 19:57:30 localhost kernel: [<ffffffff8845437c>] :nfs:reclaimer+0x1a4/0x2ac Apr 13 19:57:30 localhost kernel: [<ffffffff884541d8>] :nfs:reclaimer+0x0/0x2ac Apr 13 19:57:30 localhost kernel: [<ffffffff80032360>] kthread+0xfe/0x132 Apr 13 19:57:30 localhost kernel: [<ffffffff8005dfb1>] child_rip+0xa/0x11 Apr 13 19:57:30 localhost kernel: [<ffffffff8009d909>] keventd_create_kthread+0x0/0xc4 Apr 13 19:57:30 localhost kernel: [<ffffffff80032262>] kthread+0x0/0x132 Apr 13 19:57:30 localhost kernel: [<ffffffff8005dfa7>] child_rip+0x0/0x11 Apr 13 19:57:30 localhost kernel: ############################## Is this the known issue and fixed in later kernel versions ? Thank you. Regards Sujay -- 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