udev strange-ness

[Dennis Gilmore]

Once upon a time Wednesday 25 August 2004 12:39 am, Greg KH wrote:
> On Mon, Aug 23, 2004 at 08:02:10PM -0400, Dennis Gilmore wrote:
> > any idea why udevinfo hangs running
> > /usr/bin/udevinfo -r -q name -p /block/ram4  i have had to disable udev
> > since it was using 100% cpu and every reboot without fail the udevinfo
> > process is there using all the cpu.
>
> No idea, it works for me here on other block devices.  Care to run
> strace on it (the udevinfo process) to see what it is looping on?
>
> thanks,
>
> greg k-h

Greg here is the strace  it gets to the end and hangs

strace /usr/bin/udevinfo -r -q name -p /block/ram4
execve("/usr/bin/udevinfo", ["/usr/bin/udevinfo", "-r", "-q", "name", "-p", 
"/block/ram4"], [/* 26 vars */]) = 0
uname({sys="Linux", node="jaffa.ausil.us", ...}) = 0
brk(0)                                  = 0x9328000
open("/etc/ld.so.preload", O_RDONLY)    = -1 ENOENT (No such file or 
directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=113811, ...}) = 0
old_mmap(NULL, 113811, PROT_READ, MAP_PRIVATE, 3, 0) = 0xf6fe4000
close(3)                                = 0
open("/lib/tls/libc.so.6", O_RDONLY)    = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\200{t\000"..., 512) = 
512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1494704, ...}) = 0
old_mmap(0x733000, 1195084, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 
0) = 0x733000
old_mmap(0x851000, 16384, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|
MAP_DENYWRITE, 3, 0x11e000) = 0x851000
old_mmap(0x855000, 7244, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|
MAP_ANONYMOUS, -1, 0) = 0x855000
close(3)                                = 0
open("/lib/libselinux.so.1", O_RDONLY)  = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0D\376^\000"..., 512) = 
512
fstat64(3, {st_mode=S_IFREG|0755, st_size=71816, ...}) = 0
old_mmap(0x5ec000, 71556, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 
0) = 0x5ec000
old_mmap(0x5fb000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|
MAP_DENYWRITE, 3, 0xf000) = 0x5fb000
old_mmap(0x5fd000, 1924, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|
MAP_ANONYMOUS, -1, 0) = 0x5fd000
close(3)                                = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0xf6fe3000
mprotect(0x851000, 8192, PROT_READ)     = 0
set_thread_area({entry_number:-1 -> 6, base_addr:0xf6fe34e0, limit:1048575, 
seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, 
seg_not_present:0, useable:1}) = 0
munmap(0xf6fe4000, 113811)              = 0
access("/etc/selinux/", F_OK)           = 0
brk(0)                                  = 0x9328000
brk(0x9349000)                          = 0x9349000
open("/etc/selinux/config", O_RDONLY)   = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=440, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0xf6fff000
read(3, "# This file controls the state o"..., 4096) = 440
close(3)                                = 0
munmap(0xf6fff000, 4096)                = 0
open("/proc/mounts", O_RDONLY)          = 3
fstat64(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0xf6fff000
read(3, "rootfs / rootfs rw 0 0\n/proc /pr"..., 1024) = 404
close(3)                                = 0
munmap(0xf6fff000, 4096)                = 0
getpid()                                = 8055
open("/proc/mounts", O_RDONLY)          = 3
fstat64(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0xf6fff000
read(3, "rootfs / rootfs rw 0 0\n/proc /pr"..., 1024) = 404
close(3)                                = 0
munmap(0xf6fff000, 4096)                = 0
open("/etc/udev/udev.conf", O_RDONLY)   = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=2183, ...}) = 0
mmap2(NULL, 2183, PROT_READ, MAP_SHARED, 3, 0) = 0xf6fff000
close(3)                                = 0
munmap(0xf6fff000, 2183)                = 0
open("/dev/.udev.tdb", O_RDONLY)        = 3
fcntl64(3, F_GETFD)                     = 0
fcntl64(3, F_SETFD, FD_CLOEXEC)         = 0
read(3, "TDB file\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 168) = 
168
fstat64(3, {st_mode=S_IFREG|0644, st_size=196608, ...}) = 0
mmap2(NULL, 196608, PROT_READ, MAP_SHARED, 3, 0) = 0xf6fb3000