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FS locks



Hello,

unfortunately I got some trouble using ext3 - the system hangs when
working in a certain directory. Not completely, I can switch between
consoles and reboot with SysRQ, but cannot do anything which requires
disk IO: not start any applications, not umount, nothing. I could send
the strace output, but I don't think this would help anyone. Sorry, but
I don't have a clue where to start debugging. There are no
debugging messages on my syslog console in the time of the freeze when I
compile with JBD and enable via 1>/proc/sys/fs/jbd-debug.
The filesystem seems to be clean, e2fsck passes without errors. Please
let me know if (and how) I could help on debugging a such problem.

Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/hda7              5537490   4781331    412049  93% /

Filesystem            Inodes   IUsed   IFree IUse% Mounted on
/dev/hda7            1441256  255539 1185717   18% /


[pid  2232] time(NULL)                  = 1001184942
[pid  2232] time([1001184942])          = 1001184942
[pid  2232] getpid()                    = 2232
[pid  2232] rt_sigaction(SIGPIPE, {0x401dfe08, [], 0x4000000}, {SIG_DFL}, 8) =
0[pid  2232] send(3, "<60>Sep 22 20:55:42 makehistory["..., 106, 0) = 106
[pid  2232] rt_sigaction(SIGPIPE, {SIG_DFL}, NULL, 8) = 0
[pid  2232] fcntl64(4, F_SETLKW, {type=F_WRLCK, whence=SEEK_SET, start=66184,
len=64}) = 0
[pid  2232]
unlink("/var/spool/news/overview/d/c/o/u/l/m/de.comp.os.unix.linux.misc-NEW.IDX")
= 0
[pid  2232]
open("/var/spool/news/overview/d/c/o/u/l/m/de.comp.os.unix.linux.misc.DAT",
O_RDWR|O_APPEND|O_CREAT, 0660) = 14
[pid  2232]
open("/var/spool/news/overview/d/c/o/u/l/m/de.comp.os.unix.linux.misc.IDX",
O_RDWR|O_CREAT, 0660) = 15
[pid  2232] fstat64(15, {st_mode=S_IFREG|0640, st_size=21312, ...}) = 0
[pid  2232] fcntl64(14, F_GETFD)        = 0
[pid  2232] fcntl64(14, F_SETFD, FD_CLOEXEC) = 0
[pid  2232] fcntl64(15, F_GETFD)        = 0
[pid  2232] fcntl64(15, F_SETFD, FD_CLOEXEC) = 0
[pid  2232] fstat64(14, {st_mode=S_IFREG|0640, st_size=747, ...}) = 0
[pid  2232] fstat64(15, {st_mode=S_IFREG|0640, st_size=21312, ...}) = 0
[pid  2232] old_mmap(NULL, 747, PROT_READ, MAP_SHARED, 14, 0) = 0x40016000
[pid  2232] old_mmap(NULL, 21312, PROT_READ, MAP_SHARED, 15, 0) = 0x40017000
[pid  2232]
open("/var/spool/news/overview/d/c/o/u/l/m/de.comp.os.unix.linux.misc-NEW.IDX",
O_RDWR|O_CREAT, 0660) = 16
[pid  2232] fstat64(15, {st_mode=S_IFREG|0640, st_size=21312, ...}) = 0
[pid  2232] pwrite(16,
"\0\0\0\0\36\1\0\0\312v\247;\0\0\0\0\5\1\0\0\0\f\0\0\26"..., 20196, 32868) =
16284
[pid  2232] time([1001184942])          = 1001184942
[pid  2232] getpid()                    = 2232
[pid  2232] rt_sigaction(SIGPIPE, {0x401dfe08, [], 0x4000000}, {SIG_DFL}, 8) =
0[pid  2232] send(3, "<59>Sep 22 20:55:42 makehistory["..., 174, 0) = 174
[pid  2232] rt_sigaction(SIGPIPE, {SIG_DFL}, NULL, 8) = 0
[pid  2232] close(16)                   = 0
[pid  2232] close(15)                   = 0
[pid  2232] close(14)                   = 0
[pid  2232] munmap(0x40017000, 21312)   = 0
[pid  2232] munmap(0x40016000, 747)     = 0
[pid  2232] fcntl64(4, F_SETLKW, {type=F_UNLCK, whence=SEEK_SET, start=66184,
len=64}) = 0
[pid  2232] write(2, "makehistory: Can\'t write overvie"..., 80makehistory:
Can't write overview data "@05010000000B000059410000000000000000@"
) = 80
[pid  2232] time(NULL)                  = 1001184942
[pid  2232] time([1001184942])          = 1001184942
[pid  2232] getpid()                    = 2232
[pid  2232] rt_sigaction(SIGPIPE, {0x401dfe08, [], 0x4000000}, {SIG_DFL}, 8) =
0[pid  2232] send(3, "<60>Sep 22 20:55:42 makehistory["..., 106, 0

Gruss/Regards,
Eduard.
-- 
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