Hi, problem described in the title happens on heavy I/O pressure on the host, without idle=poll trace almost always is the same, involving mwait, with poll and nohz=off RIP varies from time to time, at the previous hang it was tg_throttle_down, rather than test_ti_thread_flag in attached one. Both possible clocksource drivers, hpet and tsc, able to reproduce that with equal probability. VMs are pinned over one of two numa sets on two-head machine, mean emulator thread and each of vcpu threads has its own cpuset cg with '0-5,12-17' or '6-11,18-23'. I`ll appreciate any suggestions to try.
Attachment:
dmesg2.txt.gz
Description: GNU Zip compressed data
