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2f12f03436
If a thread in a virtual core becomes runnable while other threads in the same virtual core are already running in the guest, it is possible for the latecomer to join the others on the core without first pulling them all out of the guest. Currently this only happens rarely, when a vcpu is first started. This fixes some bugs and omissions in the code in this case. First, we need to check for VPA updates for the latecomer and make a DTL entry for it. Secondly, if it comes along while the master vcpu is doing a VPA update, we don't need to do anything since the master will pick it up in kvmppc_run_core. To handle this correctly we introduce a new vcore state, VCORE_STARTING. Thirdly, there is a race because we currently clear the hardware thread's hwthread_req before waiting to see it get to nap. A latecomer thread could have its hwthread_req cleared before it gets to test it, and therefore never increment the nap_count, leading to messages about wait_for_nap timeouts. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de> |
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| boot | ||
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| include | ||
| kernel | ||
| kvm | ||
| lib | ||
| math-emu | ||
| mm | ||
| net | ||
| oprofile | ||
| perf | ||
| platforms | ||
| sysdev | ||
| xmon | ||
| Kconfig | ||
| Kconfig.debug | ||
| Makefile | ||
| relocs_check.pl | ||