Bug 101413 – autofs can't shut down

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Bug 101413 - autofs can't shut down

Summary:	autofs can't shut down

Status:	CLOSED CURRENTRELEASE

Aliases:	None

Product:	Red Hat Linux Beta
Classification:	Retired
Component:	kernel (Show other bugs)
Sub Component:
Version:	beta1
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Dave Jones
QA Contact:	Brian Brock
Docs Contact:

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Depends On:
Blocks:	CambridgeBlocker
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Reported:	2003-07-31 16:02 EDT by Bill Nottingham
Modified:	2015-01-04 17:02 EST (History)
CC List:	5 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2004-11-25 03:02:11 EST
Type:	---
Regression:	---
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Documentation:	---
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RHEL 7.3 requirements from Atomic Host:
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Description Bill Nottingham 2003-07-31 16:02:28 EDT

Description of problem:

shutdown of autofs hangs; the current pid is 'pidof', stuck in 'R'
state.

Show Regs sez:

Pid/TGid: 1181911819, comm: pidof
EIP: 0060:[<c016b4f6>] CPU:0
EIP is at .text.lock.inode [kernel] 0x167 (2.4.21.20.1.2024.2.1.nptlsmp)
Call trace is:
proc_pid_make_inode
proc_pid_lookup
real_lookup
link_path_walk
path_lookup
__user_walk
sys_stat64
sys_munmap
system_call

Seems to happen pretty much every shutdown.

Comment 1 Michael K. Johnson 2003-08-08 16:19:19 EDT

Our only changes to autofs from the base kernel are in the O(1)/nptl patch,
and they involve signal handling.  Have you seen this in the upstream 2.4.21
kernel by any chance?

Comment 2 Bill Nottingham 2003-08-08 17:06:31 EDT

It seems to work in taroon, which is also NPTL.

Comment 3 Brian Brock 2003-10-10 11:28:49 EDT

I'm still seeing this in 2.4.22-1.2087.nptlsmp  on an thlon system.

Comment 4 Michael K. Johnson 2003-10-21 16:19:15 EDT

Ingo, any thoughts?

Comment 5 Chris Ricker 2003-10-22 15:21:37 EDT

I use autofs very extensively for NFS mounts, and I've not been seeing this. All
my severn workstations are single CPU Athlon or mobile Athlon, though

Comment 6 Ingo Molnar 2003-10-27 13:16:59 EST

hm, it seems to have spinlock deadlocked in some inode.c function called by
proc_pid_make_inode() - possibly new_inode()? This is not something NPTL has
changed or should affect directly.

Comment 7 Ingo Molnar 2003-10-27 13:24:59 EST

what could bring us forward would be to know what happens on the other CPU which
seems to cause the deadlock of this CPU.

Comment 8 Michael K. Johnson 2003-10-29 12:38:22 EST

Hmm, I just noticed that I've got an SMP machine running autofs and I can't
reproduce this with recent kernels.  Maybe fixed...

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