Re: [PATCH 0/4] KVM: PPC: Book3S: Fix potential deadlocks

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, May 23, 2019 at 04:34:24PM +1000, Paul Mackerras wrote:
> Recent reports of lockdep splats in the HV KVM code revealed that it
> was taking the kvm->lock mutex in several contexts where a vcpu mutex
> was already held.  Lockdep has only started warning since I added code
> to take the vcpu mutexes in the XIVE device release functions, but
> since Documentation/virtual/kvm/locking.txt specifies that the vcpu
> mutexes nest inside kvm->lock, it seems that the new code is correct
> and it is most of the old uses of kvm->lock that are wrong.
> 
> This series should fix the problems, by adding new mutexes that nest
> inside the vcpu mutexes and using them instead of kvm->lock.

Series applied to my kvm-ppc-fixes branch (with v2 of 3/4).

Paul.



[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux