This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1813847
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1813847
Title:
af-alg stressor triggers modprobe throttling
Status in Stress-ng:
In Progress
Status in linux package in Ubuntu:
Incomplete
Bug description:
Due to the combination of high core counts and perhaps a lack of
available hash/crypto hardware acceleration drivers, arm64 server
platforms generate a lot of noisy modprobe throttling messages when
running the af-alg stressor. This appears to be partially mitigated in
master by disabling hashes/ciphers once they are found to be not
present. But, w/ 96 cores/hogs, we presumably still hit the kernel
with 96 * (nr_hashes + nr_ciphers) before that mitigation takes
effect, and that is sufficient to cause the kernel to emit throttling
messages.
$ sudo dmesg -c > /dev/null ; ./stress-ng --af-alg 0 --af-alg-ops=200000;
sudo dmesg -c
stress-ng: info: [76141] defaulting to a 86400 second (1 day, 0.00 secs) run
per stressor
stress-ng: info: [76141] dispatching hogs: 96 af-alg
stress-ng: info: [76141] successful run completed in 0.40s
[ 5808.489046] __request_module: 25 callbacks suppressed
[ 5808.489050] request_module: kmod_concurrent_max (0) close to 0
(max_modprobes: 50), for module crypto-ghash, throttling...
[ 5808.489503] request_module: kmod_concurrent_max (0) close to 0
(max_modprobes: 50), for module crypto-ghash, throttling...
[ 5808.489724] request_module: kmod_concurrent_max (0) close to 0
(max_modprobes: 50), for module crypto-ghash, throttling...
[ 5808.489731] request_module: kmod_concurrent_max (0) close to 0
(max_modprobes: 50), for module crypto-ghash, throttling...
[ 5808.490092] request_module: kmod_concurrent_max (0) close to 0
(max_modprobes: 50), for module crypto-xor-all, throttling...
[ 5808.490235] request_module: kmod_concurrent_max (0) close to 0
(max_modprobes: 50), for module crypto-ghash-all, throttling...
[ 5808.490308] request_module: kmod_concurrent_max (0) close to 0
(max_modprobes: 50), for module crypto-ghash, throttling...
[ 5808.490367] request_module: kmod_concurrent_max (0) close to 0
(max_modprobes: 50), for module crypto-ghash, throttling...
[ 5808.490597] request_module: kmod_concurrent_max (0) close to 0
(max_modprobes: 50), for module crypto-ghash, throttling...
To manage notifications about this bug go to:
https://bugs.launchpad.net/stress-ng/+bug/1813847/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
