do you know what __percpu_counter_sum does? I am wondering why it has
been sampled a lot of times.
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https://bugs.launchpad.net/bugs/2021571
Title:
cat
I have no idea what racadm is ..
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Title:
cat /sys/fs/cgroup/blkio/blkio.time_recursive took 1second to
complete
Status in
we might have around 50 multipath mappers per node and underline device
is FC based disk. But disks added/removed should not be frequent. What
machine are you using? For me, some nodes are intel 2650, not sure if it
is relevant.
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thank you and same for me. __percpu_counter_sum is very slow even though
only one block device.. Not really figure why. Do you have any clue to
reproduce this behavior?
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Hi Kevin, have you used perf and analyze the flamegraph?
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Title:
cat /sys/fs/cgroup/blkio/blkio.time_recursive took 1second
Public bug reported:
Issue:
```console
# time cat /sys/fs/cgroup/blkio/blkio.time_recursive
8:16 354721435
real0m1.297s
user0m0.000s
sys 0m1.297s
```
As could be seen from above result, cat blkio took about 1 second to complete
which
is much longer than a normal case.
Kernel
Thank you very much for the reply. Another question is try_get_page
returns -ENOMEM but kvm warning is bad address which should be EFAULT.
Why qemu prints error log says bad address?
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https://answers.launchpad.net/ubuntu/+question/698319
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https://bugs.launchpad.net/bugs/1763062
Title:
LSM stacking patches for bionic
Status in linux package in Ubuntu:
may I ask why reboots via kexec-tools only supported on sysv init
systemd?
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https://bugs.launchpad.net/bugs/1713997
Title:
kexec-tools should not ask to handle
hello, may I ask how did you capture the log? My kdump also stuck but
unfortunately does not print anything. the system looks dead though. the
vm got a memory size of 4GiB
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Interestingly, I hit this warning log without enabling ksm
```console
# cat /sys/kernel/mm/ksm/run
0
# uname -a
Linux compute12 4.15.0-72-generic #81-Ubuntu SMP Tue Nov 26 12:20:02 UTC 2019
x86_64 x86_64 x86_64 GNU/Linux
# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Hi, sorry to ask non related questions. But could youe please teach how
did you identity there is a negative refcnts from the dmesg? thanks...
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