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SubjectRe: Kernel 2.5.71 cannot unmount nfs
On Mon, 16 Jun 2003, Seifert Guido, gse wrote:

>
> Sorry for the incomplete and unprofessional bugreport, I don't have more
> info. I tried Kernel 2.5.71. Everything seems to work fine until I shut
> down or try to unmount a mountend nfs filesystem. For several minutes
> nothing happens, then I get something what looks like a backtrace from
> the nfs related code section. Unfortunately there is nothing in the log
> files afterwards. G.

If the backtrace looks similar to this one:

Pid: 6820, comm: umount
EIP: 0060:[<c01bbfb9>] CPU: 0
EIP is at atomic_dec_and_lock+0x99/0x9b
EFLAGS: 00000246 Not tainted
EAX: 00000000 EBX: c387a48c ECX: ddf35348 EDX: ddf35348
ESI: c03173a0 EDI: c387a48c EBP: c387a4a8 DS: 007b ES: 007b
CR0: 8005003b CR2: 40018000 CR3: 03040000 CR4: 00000010
Call Trace:
[<c0170d3c>] dput+0x1c/0x280
[<c0170d22>] dput+0x2/0x280
[<cc8d02ac>] rpc_depopulate+0x16c/0x190 [sunrpc]
[<cc8d078e>] rpc_rmdir+0x5e/0x90 [sunrpc]
[<cc8f6ce0>] nfs_sops+0x0/0x60 [nfs]
[<cc8c02fb>] rpc_destroy_client+0x4b/0x70 [sunrpc]
[<cc8e3767>] nfs_put_super+0x17/0x40 [nfs]
[<c015f34a>] generic_shutdown_super+0xda/0x210
[<cc8f6e00>] nfs_fs_type+0x0/0x20 [nfs]
[<c016009f>] kill_anon_super+0xf/0x80
[<cc8e5b51>] nfs_kill_super+0x11/0x20 [nfs]
[<c015f030>] deactivate_super+0x80/0x110
[<c01771f7>] __mntput+0x17/0x30
[<c0166f48>] path_release+0x28/0x30
[<c0177b4b>] sys_umount+0x7b/0x90
[<c0177b6b>] sys_oldumount+0xb/0x10
[<c01093b7>] syscall_call+0x7/0xb


... then you'll probably need the following patch:

<http://marc.theaimsgroup.com/?l=linux-kernel&m=105566442521995&w=2>

HTH
Martin

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