Package: upower Version: 0.9.9-4 Severity: important
Hello,
upowerd resets or modifies block-device tuning parameters (like
read-ahead) on start-up.
This behaviour is nothing one would expect upowerd to do according to
it's specification and it does directly affect system's performance and
interfers with tools that try to tune it.
upowerd doesn't do this to all block-devices but it seems to be
restricted to block-devices finally carrying (mounted?) file-systems.
upowerd usually gets started during gdm3 startup, but running it
stand-alone exposes the same behaviour:
root@ideapad:~# blockdev --report
RO RA SSZ BSZ StartSec Size Device
rw 1024 512 4096 0 500107862016 /dev/sda
rw 1024 512 512 63 104825344 /dev/sda1
rw 1024 512 4096 204800 104857600 /dev/sda2
rw 1024 512 4096 409600 214748364800 /dev/sda3
rw 1024 512 1024 419840000 1024 /dev/sda4
rw 1024 512 2048 419840063 616863744 /dev/sda5
rw 1024 512 512 421044938 6201828864 /dev/sda6
rw 1024 512 512 433157948 32210164224 /dev/sda7
rw 1024 512 4096 496068488 3216052224 /dev/sda8
rw 1024 512 1024 502349903 214753803264 /dev/sda9
rw 1024 512 512 921790988 23623336448 /dev/sda10
rw 1024 512 1024 0 104726528 /dev/md0
rw 1024 512 2048 0 616851456 /dev/md1
rw 1024 512 1024 0 6200767488 /dev/md2
rw 1024 512 4096 0 614754304 /dev/dm-0
rw 1024 512 4096 0 6198670336 /dev/dm-1
rw 1024 512 2048 0 32209041408 /dev/md3
rw 1024 512 4096 0 3214991360 /dev/md4
rw 1024 512 1024 0 214752615424 /dev/md5
rw 1024 512 4096 0 32206944256 /dev/dm-2
rw 1024 512 4096 0 3212894208 /dev/dm-3
rw 1024 512 4096 0 214750518272 /dev/dm-4
root@ideapad:~# /usr/lib/upower/upowerd > /dev/null
(upowerd:12125): UPower-Linux-WARNING **: energy 54.110000 bigger than full
45.930000
(upowerd:12125): UPower-Linux-WARNING **: no device file
^C
root@ideapad:~# blockdev --report
RO RA SSZ BSZ StartSec Size Device
rw 1024 512 4096 0 500107862016 /dev/sda
rw 1024 512 512 63 104825344 /dev/sda1
rw 1024 512 4096 204800 104857600 /dev/sda2
rw 1024 512 4096 409600 214748364800 /dev/sda3
rw 1024 512 1024 419840000 1024 /dev/sda4
rw 1024 512 2048 419840063 616863744 /dev/sda5
rw 1024 512 512 421044938 6201828864 /dev/sda6
rw 1024 512 512 433157948 32210164224 /dev/sda7
rw 1024 512 4096 496068488 3216052224 /dev/sda8
rw 1024 512 1024 502349903 214753803264 /dev/sda9
rw 1024 512 512 921790988 23623336448 /dev/sda10
rw 256 512 1024 0 104726528 /dev/md0
rw 1024 512 2048 0 616851456 /dev/md1
rw 1024 512 1024 0 6200767488 /dev/md2
rw 256 512 4096 0 614754304 /dev/dm-0
rw 1024 512 4096 0 6198670336 /dev/dm-1
rw 1024 512 2048 0 32209041408 /dev/md3
rw 1024 512 4096 0 3214991360 /dev/md4
rw 1024 512 1024 0 214752615424 /dev/md5
rw 256 512 4096 0 32206944256 /dev/dm-2
rw 256 512 4096 0 3212894208 /dev/dm-3
rw 256 512 4096 0 214750518272 /dev/dm-4
root@ideapad:~#
regards
Mario
--
Programmieren in C++ haelt die grauen Zellen am Leben. Es schaerft
alle fuenf Sinne: den Schwachsinn, den Bloedsinn, den Wahnsinn, den
Unsinn und den Stumpfsinn.
[Holger Veit in doc]
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