Eric W. Biederman wrote: > I don't have a clue what the issue would be but I would start with > something like the patch below. OK using it I got the following... This time with /dev on another machine (same nfs root-fs): Aug 17 13:57:04 dhcp195 kernel: NFS: nfs_lookup_revalidate(/dev): nfs_lookup_verify_inode() failed Aug 17 13:57:04 dhcp195 kernel: NFS: nfs_lookup_revalidate(/dev) is invalid Aug 17 13:57:04 dhcp195 kernel: NFSROOT __detach_mounts: dev Aug 17 13:57:04 dhcp195 kernel: CPU: 3 PID: 32644 Comm: modtrack Tainted: P O 4.1.6-lomac1-00296-gfeae456 #7 Aug 17 13:57:04 dhcp195 kernel: Hardware name: System manufacturer System Product Name/P7P55D, BIOS 1807 07/22/2010 Aug 17 13:57:04 dhcp195 kernel: ffff88021315bc18 ffff88021315bbd8 ffffffff81560638 000000000000b413 Aug 17 13:57:04 dhcp195 kernel: ffff880216460f18 ffff88021315bbf8 ffffffff81106e1f 000000000000001b Aug 17 13:57:04 dhcp195 kernel: ffff880216460f18 ffff88021315bc48 ffffffff810ffcf5 0000000005dd05dd Aug 17 13:57:04 dhcp195 kernel: Call Trace: Aug 17 13:57:04 dhcp195 kernel: [<ffffffff81560638>] dump_stack+0x4c/0x6e Aug 17 13:57:04 dhcp195 kernel: [<ffffffff81106e1f>] __detach_mounts+0x20/0xdf Aug 17 13:57:04 dhcp195 kernel: [<ffffffff810ffcf5>] d_invalidate+0x9a/0xc8 Aug 17 13:57:04 dhcp195 kernel: [<ffffffff810f6c49>] lookup_fast+0x1f5/0x26f Aug 17 13:57:04 dhcp195 kernel: [<ffffffff810f6ef0>] do_last.isra.43+0xd6/0x9fb Aug 17 13:57:04 dhcp195 kernel: [<ffffffff810f92a4>] path_openat+0x1d1/0x53e Aug 17 13:57:04 dhcp195 kernel: [<ffffffff810fa077>] ? user_path_at_empty+0x63/0x93 Aug 17 13:57:04 dhcp195 kernel: [<ffffffff810fa11c>] do_filp_open+0x35/0x85 Aug 17 13:57:04 dhcp195 kernel: [<ffffffff811f1aa9>] ? find_next_zero_bit+0x17/0x1d Aug 17 13:57:04 dhcp195 kernel: [<ffffffff81104364>] ? __alloc_fd+0xdd/0xef Aug 17 13:57:04 dhcp195 kernel: [<ffffffff810eca9c>] do_sys_open+0x146/0x1d5 Aug 17 13:57:04 dhcp195 kernel: [<ffffffff810ecb55>] SyS_openat+0xf/0x11 Aug 17 13:57:04 dhcp195 kernel: [<ffffffff81565a57>] system_call_fastpath+0x12/0x6a So this looks like I would need to add some debug output to "nfs_lookup_verify_inode" then right? Sven -- Why are there so many Unix-haters-handbooks and not even one Microsoft-Windows-haters handbook? Gurer vf ab arrq sbe n unaqobbx gb ungr Zvpebfbsg Jvaqbjf! /me is giggls@ircnet, http://sven.gegg.us/ on the Web -- 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