You are not logged in.
Pages: 1
I copied the udev automount rule from the wiki page.
It works, but when it mounts a usb drive, udev starts using a lot of cpu (100% sometimes)
and it makes a few copies of itself and uses alot of memory. I unplugged the drive
to see if that would stop it; it's sortof stopped growing, but the 5 udev instances are collectively
using 171 Mb and ~40% cpu right now.
Here's the output of top right now showing the friendly udevs:
251 root 20 0 50336 47m 680 S 12 4.8 17:00.27 udevd
32218 root 20 0 33964 31m 436 S 0 3.2 0:00.44 udevd
29229 root 20 0 33400 31m 448 S 16 3.1 3:35.89 udevd
11486 root 20 0 33400 31m 404 S 0 3.1 0:00.51 udevd
2634 root 20 0 33400 31m 380 S 0 3.1 0:00.58 udevd Here's the rule I used
KERNEL!="sd[a-z][0-9]", GOTO="media_by_label_auto_mount_end"
# Import FS infos
IMPORT{program}="/sbin/blkid -o udev -p %N"
# Get a label if present, otherwise specify one
ENV{ID_FS_LABEL}!="", ENV{dir_name}="%E{ID_FS_LABEL}"
ENV{ID_FS_LABEL}=="", ENV{dir_name}="%k"
# Global mount options
ACTION=="add", ENV{mount_options}="noatime"
# Filesystem-specific mount options
ACTION=="add", ENV{ID_FS_TYPE}=="vfat|ntfs", ENV{mount_options}="$env{mount_options},utf8,gid=100,umask=002"
# Mount the device
ACTION=="add", RUN+="/bin/mkdir -m 777 -p /media/%E{dir_name}", RUN+="/bin/mount -o $env{mount_options} /dev/%k /media/%E{dir_name}"
# Clean up after removal
ACTION=="remove", ENV{dir_name}!="", RUN+="/bin/umount -l /media/%E{dir_name}", RUN+="/bin/rmdir /media/%E{dir_name}"
# Exit
LABEL="media_by_label_auto_mount_end"The drive is a 1GB usb flash, no history of trouble. My computer is an eee 1101HA 1Gb ram, 1333 Mhz cpu, if that helps.
Does anyone know why this is happening?
PS: The two udevs that were sucking cpu just died, the other three are using 93Mb and no cpu.
EDIT: This problem, or something like it seems to have been around for a while
I found lots of discussion in 2009, but still mentions of it in 2011.
https://bbs.archlinux.org/viewtopic.php?id=78946&p=3
I can't find any mention of a usable fix.
Last edited by apefish (2011-07-19 17:56:52)
Offline
What happens if you delete the rule and use a program like devmon or udiskie instead?
Offline
diskie and devmon require a lot more installs and configs, so I'll approach that slowly.
EDIT: cut some incorrect stuff
I looked into it more, it actually has nothing to do with the udev rule. I did some tests:
With a fresh boot and no custom rules, udev expands constantly after I plug in the device,
Taking 10 mins to reach 16M memory use, with no sign of stopping (it got to 170M earlier).
CPU usage of the expanding process goes up proportionally as well (to 26 in this case, 100% before)
child processes uses CPU constantly at ~13%. 8 minutes after i unplug the device, everything
finally settles down (it's not a memory leak).
Here's the interesting data points:
19:45 Fresh boot with empty /etc/udev/rules.d. 3 udev processes:
248 root 20 0 2288 1004 680 S 0 0.1 0:00.25 udevd
276 root 20 0 2188 696 436 S 0 0.1 0:00.00 udevd
277 root 20 0 2188 664 408 S 0 0.1 0:00.00 udevd19:48 plugged in drive, udev forks:
248 root 20 0 2684 1300 680 S 2 0.1 0:00.63 udevd
276 root 20 0 2188 724 448 S 13 0.1 0:02.68 udevd
277 root 20 0 2188 708 448 S 0 0.1 0:00.01 udevd
2480 root 20 0 2284 740 412 S 0 0.1 0:00.00 udevd
2503 root 20 0 2256 748 420 S 0 0.1 0:00.00 udevd
2504 root 20 0 2284 768 436 S 0 0.1 0:00.00 udevd
2505 root 20 0 2260 776 444 S 0 0.1 0:00.00 udevd
2509 root 20 0 2284 660 336 S 0 0.1 0:00.00 udevd19:58 pid=248 reaches 16M, time to unplug drive.
248 root 20 0 18128 16m 680 S 26 1.6 1:29.32 udevd
276 root 20 0 2188 724 448 S 12 0.1 1:17.28 udevd
277 root 20 0 2188 708 448 S 0 0.1 0:00.01 udevd
2480 root 20 0 2284 740 412 S 0 0.1 0:00.00 udevd
2503 root 20 0 2256 748 420 S 0 0.1 0:00.00 udevd
2504 root 20 0 2284 768 436 S 0 0.1 0:00.00 udevd
2505 root 20 0 2260 776 444 S 0 0.1 0:00.00 udevd
2509 root 20 0 2284 660 336 S 0 0.1 0:00.00 udevd20:03 pid=248 cpu use has gone down alot, 276 still chewing cpu at high rate:
248 root 20 0 18392 16m 680 S 2 1.7 2:01.65 udevd
276 root 20 0 2188 732 456 S 16 0.1 2:02.90 udevd
277 root 20 0 2188 720 460 S 0 0.1 0:00.01 udevd
2480 root 20 0 2284 756 428 S 0 0.1 0:00.00 udevd
2503 root 20 0 2256 748 420 S 0 0.1 0:00.00 udevd
2504 root 20 0 2284 768 436 S 0 0.1 0:00.00 udevd
2505 root 20 0 2260 776 444 S 0 0.1 0:00.00 udevd
2509 root 20 0 2284 660 336 S 0 0.1 0:00.00 udevd20:05 5 udevs die, pid=248 goes back to 1M and 0% cpu:
248 root 20 0 2264 1012 680 S 0 0.1 2:02.18 udevd
2505 root 20 0 2260 776 444 S 0 0.1 0:00.00 udevd
2509 root 20 0 2284 660 336 S 0 0.1 0:00.00 udevdNo change beyond this point.
Last edited by apefish (2011-07-20 02:25:44)
Offline
Pages: 1