process hang with xfs 1.0.1

[Amit D Chaudhary <amitc@xxxxxxxxxxx>]

Hi,

We run into a process hang, ps -elf shows the status as 'D'. The stack 
trace shows it might be xfs_read. We are running xfs 1.0.1 with a few 
more patches from the TAKES, see list below on powerpc linux kernel 
2.4.2 by MontaVista. This is reproducable though the duration to make it 
happen varies, took around an hour last time and the process can vary 
and has included insmod and rpm.

Any comments or directions are welcome. I can email the System.map or 
other files as required.

Thanks
Amit

------------------------------------------------------
ps -elf

cp1:root> ps -elf
  F S UID        PID  PPID  C PRI  NI ADDR    SZ  WCHAN STIME TTY 
    TIME CMD
100 S root         1     0  1  68   0    -   312  4a630 14:41 ? 
00:00:04 init
040 S root         2     1  0  69   0    -     0  22140 14:41 ? 
00:00:00 [keventd]
040 S root         3     1  0  69   0    -     0  2fe10 14:41 ? 
00:00:00 [kswapd]
040 S root         4     1  0  69   0    -     0  2ff04 14:41 ? 
00:00:00 [kreclaimd]
040 S root         5     1  0  69   0    -     0  3c358 14:41 ? 
00:00:00 [bdflush]
040 S root         6     1  0  69   0    -     0  3c450 14:41 ? 
00:00:00 [kupdate]
040 S root         7     1  0  69   0    -     0  83664 14:41 ? 
00:00:00 [pagebuf_daemon]
000 S root        93     1  0  69   0    -   700  16bf0 14:41 ? 
00:00:00 /bin/sh /etc/rc.d/rc 3
140 S bin        126     1  0  69   0    -   310  4a630 14:41 ? 
00:00:00 /sbin/portmap
140 S root       136     1  0  69   0    -   342  4a630 14:41 ? 
00:00:00 /usr/sbin/inetd
040 S root       166     1  0  69   0    -   341  4a630 14:41 ? 
00:00:00 /usr/sbin/syslogd -m 0
140 S root       167     1  0  69   0    -   307  1286c 14:41 ? 
00:00:00 /usr/sbin/klogd -x
000 S root       175    93  0  69   0    -   569  16bf0 14:41 ? 
00:00:00 /bin/sh /etc/rc.d/rc3.d/S80fstest start
000 D root       309   175  0  69   0    -   598  26be4 14:42 ? 
00:00:01 rpm -V apache-1.3.14-2
000 S root       310   175  0  69   0    -   340  42f14 14:42 ? 
00:00:00 grep  /lib
000 S root       311   136  1  73   0    -   520  4a630 14:45 ? 
00:00:00 in.telnetd: 192.168.198.232 
                 100 S root       312   311  1  72   0    -   743 
16bf0 14:45 pts/0    00:00:00 -sh
000 R root       329   312  0  74   0    -   651      - 14:46 pts/0 
00:00:00 ps -elf



>>
>> ps
    ADDR    UID    PID   PPID  STATE     FLAGS  NAME
===============================================================================
c01bd020      0      0      0      0         0  swapper
c0454000      0      1      0      1       100  init
c7e02000      0      2      1      1        40  keventd
c04fe000      0      3      1      1       840  kswapd
c04fc000      0      4      1      1       840  kreclaimd
c04fa000      0      5      1      1        40  bdflush
c04f8000      0      6      1      1        40  kupdate
c7e46000      0      7      1      1       840  pagebuf_daemon
c778a000      0     93      1      1         0  rc
c781e000      1    126      1      1       140  portmap
c7fb0000      0    136      1      1       140  inetd
c7f6e000      0    166      1      1        40  syslogd
c7f00000      0    167      1      1       140  klogd
c7358000      0    175     93      1         0  S80fstest
c67b0000      0    309    175      2         0  rpm
c6f7e000      0    310    175      1         0  grep
c6164000      0    311    136      1         0  in.telnetd
c6148000      0    312    311      1       100  sh
c5efa000      0    330    312      0       100  gdbserver
===============================================================================
19 active task structs found
>> bt 0xc67b0000
=====================================================================
STACK TRACE FOR TASK: 0xc67b0000 (rpm)

 0 _switch_to+104 [0xc00052e0]
 1 schedule+792 [0xc000f86c]
 2 __lock_page+144 [0xc0026be4]
 3 lock_page+32 [0xc0026c5c]
 4 do_generic_file_read+628 [0xc0027524]
 5 generic_file_read+64 [0xc0027920]
 6 xfs_read+380 [0xc00e48dc]
 7 linvfs_read+100 [0xc00e02a0]
 8 sys_read+132 [0xc0036f70]
 9 ret_from_syscall_1 [0xc00026b4]
10 <stack chain invalid (reverse stack direction)>+<ERROR> [0x0]
=====================================================================
>>





TAKE - work around gcc bug during xfs_growfs
http://marc.theaimsgroup.com/?l=linux-xfs&m=100274698924296&w=2

URL:
Re: Busy inodes after umount
http://marc.theaimsgroup.com/?l=linux-xfs&m=99558966006128&w=2
http://marc.theaimsgroup.com/?l=linux-xfs&m=99670088622262&w=2

TAKE - fix hang with mmap writes to a full filesystem
http://marc.theaimsgroup.com/?l=linux-xfs&m=100206169000709&w=2

TAKE - fix a hang in parallel copies & dbench
http://marc.theaimsgroup.com/?l=linux-xfs&m=100196296016505&w=2