Details
-
Bug
-
Resolution: Incomplete
-
Critical
-
None
-
7.5
-
None
-
XenServer 7.5 with latest available patches,
HP DL380e g8 192GB RAM
custom storage manager using iSER to log in separate target for each VMs drive.
-
XSI-182
Description
If there is a lot of iSCSI login/logout requests one after another (and even simultaneously), Dom0 could experience kernel panic and crash.
I've found a patch set for this issue (for kernel 4.11 I think?)., but applying them onto XS 7.5 kernel srpm (needed a bit of backporting) and compiling kernel seems to fix this issue.
Below I'm attaching part of crash log of Dom0 (only the crash part) and link to the kernel patches.
Crashlog:
https://pastebin.com/tXyusAMD
Patches 1,2 and 3:
patches
Most important patch:
Additionally, it's possible to reproduce this issue with simple script (attached, run with parameters -H 3 -t 20). Said script crashes my machine in 60 - 90 seconds, after patching the kernel - unable to reproduce.
Pre-built .RPM with patched kernel available here:
https://github.com/mchybo/kernel-4.4.52
