Public bug reported:
I have my entire hard disk encrypted using dm-crypt (except a small boot
partition). The encrypted partition is then used as a pv for LVM and
then used for lvs.
a...@dell:~$ lsb_release -rd
Description: Ubuntu 9.04
Release: 9.04
a...@dell:~$ uname -a
Linux dell 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC 2009 x86_64
GNU/Linux
a...@dell:~$ apt-cache policy linux-generic
linux-generic:
Installed: 2.6.28.11.15
Candidate: 2.6.28.11.15
Version table:
*** 2.6.28.11.15 0
500 http://mirrors.acm.jhu.edu jaunty/restricted Packages
100 /var/lib/dpkg/status
When performing a write of any size larger than about 50MB, top
indicates that kcryptd is taking up more cpu than anything else. With
writes upwards in size of 250MB, my cpu gets saturated. In combination
with rsync, this results in my computer being only barely usable until
rsync finishes.
This did _not_ happen until I upgraded from Intrepid to Jaunty.
** Affects: linux-ports-meta (Ubuntu)
Importance: Undecided
Status: New
** Tags: cpu jaunty kcryptd kernel luks lvm
--
kcryptd uses exorbient cpu during write
https://bugs.launchpad.net/bugs/370290
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