hpet increased min_delta_ns to
May i ask for some feedback on the below.
This bug seems to pop back up again and again, i've found traces dating
back to 2004 ... this seems to trigger or correlate with a plethora of
issues. Is this a regression of some sort ?
On my system this bug >almost< exclusively occurs when i play a flash
movie from any browser ( Iceweasel and Chromium tested )
Depending on boot-parameters there are gnome-shell slugdowns which
require Xorg to be restarted or there is temporary slow-down which
recovers after some time. Could be a few minutes.
I'm doing some tests on my system so don't panic when looking at the
current cmdline, the mtrr settings seem to influence the frequence of
occurence for this type of event.
BOOT_IMAGE=/boot/vmlinuz-3.2.0-4-amd64 root=/dev/mapper/m4300-root ro
quiet nomodeset enable_mtrr_cleanup mtrr_spare_regnr=4 elevator=deadline
mtrr_gran_size=1M mtrr_chunk_size=16M video.allow_duplicates=1
I'm somewhat concerned this message might be an indication for a kernel-
level vulnerability but have little other indication but the flash-
playback trigger, and a surge of iritation-triggered paranoia.
It is also noticeable these messages are not-unique across systems and
even distributions. When running from a vanilla self-compiled kernel
these messages do not show but the same flash playback slugdown happens.
https://bugzilla.redhat.com/show_bug.cgi?id=989025
[ 141.537195] CE: hpet increased min_delta_ns to 20113 nsec
[ 141.538292] CE: hpet increased min_delta_ns to 30169 nsec
[ 195.909019] CE: hpet increased min_delta_ns to 45253 nsec
[ 195.909019] CE: hpet increased min_delta_ns to 67879 nsec
My Debian Wheezy system shows
Jan 12 13:30:26 localhost kernel: [ 2020.462393] CE: hpet increased
min_delta_ns to 20113 nsec
Jan 12 14:18:19 localhost kernel: [ 2705.462317] CE: hpet increased
min_delta_ns to 20113 nsec
Jan 12 14:18:24 localhost kernel: [ 2710.868851] CE: hpet increased
min_delta_ns to 30169 nsec
Jan 12 21:19:52 localhost kernel: [ 1393.767958] CE: hpet increased
min_delta_ns to 20113 nsec
Jan 12 23:10:09 localhost kernel: [ 2557.498114] CE: hpet increased
min_delta_ns to 30169 nsec
Jan 12 23:10:53 localhost kernel: [ 2602.091457] CE: hpet increased
min_delta_ns to 45253 nsec
Jan 13 00:58:04 localhost kernel: [ 5106.948096] CE: hpet increased
min_delta_ns to 20113 nsec
Jan 13 15:42:46 localhost kernel: [ 621.448579] CE: hpet increased
min_delta_ns to 20113 nsec
Jan 13 15:44:57 localhost kernel: [ 752.385203] CE: hpet increased
min_delta_ns to 30169 nsec
Jan 13 15:44:57 localhost kernel: [ 752.385441] CE: hpet increased
min_delta_ns to 45253 nsec
Jan 13 19:11:49 localhost kernel: [ 852.778250] CE: hpet increased
min_delta_ns to 20113 nsec
Jan 14 12:40:05 localhost kernel: [ 731.183563] CE: hpet increased
min_delta_ns to 20113 nsec
Jan 14 18:51:30 localhost kernel: [21951.280044] CE: hpet increased
min_delta_ns to 20113 nsec
Note the occurence for this bug does indicate but does not seem to
trigger system slow-downs which seemed typical. A supposed work-around
seems to be the boot parameter pci=nomsi , had it noted but not yet
tested so far.
--
jabadaba doooh ooh ooooh
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