Commits
Alexey Dobriyan authored f1e27e693e9
[PATCH] Stop tickless mode during stopmachine run Fix unusable modprobe triggered by CONFIG_HIGH_RES_TIMES=y change. Two stopmachine threads end up on two different VCPUs but one PCPU. If scheduler tick is disabled on PCPU which haven't got stopmachine thread, we will be waiting for ACK from corresponding thread for a looong time. Idle cpu doesn't wake up and doesn't steal idle stopmachine thread. Busy cpu is busy executing busy stopmachine thread. The least evil, I believe, is to disable NOHZ mode for the duration of stopmachine.