On 30/10/2015 16:25, Alex Adriaanse wrote:
I have an EC2 instance on AWS that tends to freeze several times per
week. When it freezes it stops responding to network traffic, disk
I/O stops, and CPU goes to 100%. The system comes back fine after a
reboot. I was finally able to get a kernel backtrace from when this
happened today, which I have attached to this email.
The VM in question runs Debian Jessie, and has 3 BTRFS filesystems,
including the root filesystem. Details are included below.
Any ideas?
Hi Alex -
I kept experiencing problems with the Jessie 3.16.x kernel on EC2 (and
elsewhere) with BTRFS.
Out of 8 nodes, one managed an uptime of 90 days, while the average was
about 21 days.
Crashes were seemingly random, and it was difficult to get stack traces.
For the stack traces I did get, it wasn't always obvious that the
problem lay with BTRFS.
Reboots normally needed to be forceful.
I'd suggest upgrading to a backports kernel (I compiled various 4.1.x
kernels, but there's now 4.2.x in jessie-backports).
You might also want to turn off compression...
David.
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