I did a couple more backtraces and got different results (after
detaching and reattaching):
(gdb) bt
#0 0xa7f2c410 in ?? ()
#1 0xaf9df678 in ?? ()
#2 0x08056468 in ?? ()
#3 0x00000001 in ?? ()
#4 0xa7e9e423 in open () from /lib/tls/i686/cmov/libc.so.6
#5 0x0804dbef in sync_part (name=0x8054db0 "/dev/sda1") at state.c:158
#6 0x0804dc5d in sync_current_disk () at state.c:176
#7 0x0804ddaf in sync_spinning_disks (head=0x8054e68) at state.c:221
#8 0x0804e5fe in nfd_daemon (head=0x8054e68, stat=0x8056360) at state.c:437
#9 0x0804cb2c in main (argc=3, argv=0xaf9df844) at noflushd.c:269
(gdb) bt
#0 release_line (line=0x8057608 " 1 14 ram14 0 0 0 0 0 0 0 0 0 0 0\n")
at util.c:69
#1 0x0804a966 in update_io_25 (ds=0x8056360) at disk_stat.c:502
#2 0x0804aba5 in disk_stat_update (ds=0x8056360) at disk_stat.c:556
#3 0x0804e0ec in check_io (di=0x8054e68, ds=0x8056360, interval=0)
at state.c:316
#4 0x0804e580 in nfd_daemon (head=0x8054e68, stat=0x8056360) at state.c:414
#5 0x0804cb2c in main (argc=3, argv=0xaf9df844) at noflushd.c:269
(gdb) bt
#0 0xa7f2c410 in ?? ()
#1 0xaf9df4cc in ?? ()
#2 0x00000400 in ?? ()
#3 0xa7f27000 in ?? ()
#4 0xa7e9e603 in read () from /lib/tls/i686/cmov/libc.so.6
#5 0xa7e41638 in _IO_file_read () from /lib/tls/i686/cmov/libc.so.6
#6 0xa7e429e8 in _IO_file_underflow () from /lib/tls/i686/cmov/libc.so.6
#7 0xa7e4313b in _IO_default_uflow () from /lib/tls/i686/cmov/libc.so.6
#8 0xa7e443fd in __uflow () from /lib/tls/i686/cmov/libc.so.6
#9 0xa7e386a6 in _IO_getline_info () from /lib/tls/i686/cmov/libc.so.6
#10 0xa7e385ef in _IO_getline () from /lib/tls/i686/cmov/libc.so.6
#11 0xa7e3757f in fgets () from /lib/tls/i686/cmov/libc.so.6
#12 0x0804eb71 in get_line (fp=0x8056e08) at util.c:56
#13 0x0804a8d6 in update_io_25 (ds=0x8056360) at disk_stat.c:493
#14 0x0804aba5 in disk_stat_update (ds=0x8056360) at disk_stat.c:556
#15 0x0804e0ec in check_io (di=0x8054e68, ds=0x8056360, interval=0)
at state.c:316
#16 0x0804e580 in nfd_daemon (head=0x8054e68, stat=0x8056360) at state.c:414
#17 0x0804cb2c in main (argc=3, argv=0xaf9df844) at noflushd.c:269
Also, strace shows this endless loop:
_llseek(3, 0, [0], SEEK_SET) = 0
read(3, "major minor #blocks name\n\n 8"..., 1024) = 323
open("/dev/sda", O_WRONLY) = 7
fsync(7) = 0
close(7) = 0
open("/dev/sda1", O_WRONLY) = 7
fsync(7) = 0
close(7) = 0
open("/dev/sda2", O_WRONLY) = 7
fsync(7) = 0
close(7) = 0
open("/dev/sda5", O_WRONLY) = 7
fsync(7) = 0
close(7) = 0
open("/dev/sda6", O_WRONLY) = 7
fsync(7) = 0
close(7) = 0
read(3, "", 1024) = 0
time(NULL) = 1163667408
_llseek(5, 0, [0], SEEK_SET) = 0
read(5, " 1 0 ram0 0 0 0 0 0 0 0 0 0"..., 1024) = 1024
read(5, "hda5 198 396 0 0\n 3 6 hda6 "..., 1024) = 163
read(5, "", 1024) = 0
time(NULL) = 1163667408
where:
# lsof -n|grep noflushd
noflushd 3159 root cwd DIR 8,1 4096 2 /
noflushd 3159 root rtd DIR 8,1 4096 2 /
noflushd 3159 root txt REG 8,1 105783 726181
/usr/sbin/noflushd
noflushd 3159 root mem REG 0,0 0
[heap] (stat: No such file or directory)
noflushd 3159 root mem REG 8,1 1241580 613116
/lib/tls/i686/cmov/libc-2.3.6.so
noflushd 3159 root mem REG 8,1 88164 290409
/lib/ld-2.3.6.so
noflushd 3159 root 0u CHR 1,3 1075
/dev/null
noflushd 3159 root 1u CHR 1,3 1075
/dev/null
noflushd 3159 root 2u CHR 1,3 1075
/dev/null
noflushd 3159 root 3r REG 0,3 0 4026531852
/proc/partitions
noflushd 3159 root 4u REG 0,3 0 4026531937
/proc/sys/vm/dirty_writeback_centisecs
noflushd 3159 root 5r REG 0,3 0 4026531859
/proc/diskstats
noflushd 3159 root 6r DIR 0,8 0 273
inotify
and another backtrace:
(gdb) bt full
#0 0xa7e0f174 in strtol_l () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#1 0xa7e0e82f in __strtoul_internal () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#2 0xa7e2c5fb in _IO_vfscanf () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#3 0xa7e39a79 in vsscanf () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#4 0xa7e34f2e in sscanf () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#5 0x0804a958 in update_io_25 (ds=0x8056360) at disk_stat.c:496
stat = (FILE *) 0x8056e08
ret = 14
major = 1
minor = 12
dummy = 0
rio = 0
rblk = 0
wio = 0
wblk = 0
ch_dummy = "[EMAIL PROTECTED]"
line = 0x8057608 " 1 12 ram12 0 0 0 0 0 0 0 0 0 0 0\n"
di = (disk_io_t) 0x80573f8
#6 0x0804aba5 in disk_stat_update (ds=0x8056360) at disk_stat.c:556
No locals.
#7 0x0804e0ec in check_io (di=0x8054e68, ds=0x8056360, interval=0)
at state.c:316
rw_spinning = 0
rw_stopped = 0
irq_is_idle = 0
io_flags = 1200
#8 0x0804e580 in nfd_daemon (head=0x8054e68, stat=0x8056360) at state.c:414
left = 0
sync_left = 0
interval = 0
t_new = 1163667698
t_old = 1163667698
nfd_state = NFD_STATE_PARTIAL
#9 0x0804cb2c in main (argc=3, argv=0xaf9df844) at noflushd.c:269
i = 3
ch = 4294967295
ret = 0
debug = 0
statbuf = {st_dev = 3, __pad1 = 0, st_ino = 4026531843,
st_mode = 33060, st_nlink = 1, st_uid = 0, st_gid = 0, st_rdev = 0,
__pad2 = 0, st_size = 0, st_blksize = 1024, st_blocks = 0, st_atim = {
tv_sec = 1163146769, tv_nsec = 928824423}, st_mtim = {tv_sec = 1163146769,
tv_nsec = 928824423}, st_ctim = {tv_sec = 1163146769,
tv_nsec = 928824423}, __unused4 = 0, __unused5 = 0}
diskstat = (disk_stat_t) 0x8056360
diskinfo = (disk_info_t) 0x8054e68
di = (disk_info_t) 0x0
next_timeout = (tolist_t) 0x0
monitor = 2
default_timeout = 1200
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