** Changed in: linux (Ubuntu)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1683976
Title:
Please backport fix to reference leak in cgroup blkio throttle
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Trusty:
Fix Released
Status in linux source package in Xenial:
Fix Released
Bug description:
This is fixed in Linux 4.5
https://github.com/torvalds/linux/commit/39a169b62b415390398291080dafe63aec751e0a
Basically the module reference will leak whenever you write to
/sys/fs/cgroup/blkio/blkio.throttle.*
$ uname -a
Linux david-kvm 4.4.0-72-generic #93-Ubuntu SMP Fri Mar 31 14:07:41 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux
$ lsmod | grep ^zfs
zfs 2813952 1
$ sudo sh -c 'i=100; while [ $i -gt 0 ]; do echo "230:0 1024" >
/sys/fs/cgroup/blkio/blkio.throttle.read_bps_device; i=$(($i - 1)); done'
$ lsmod | grep ^zfs
zfs 2813952 101
This patch should be applied to all kernel < 4.5
Thanks
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