diff options
| author | Junaid Shahid <junaids@google.com> | 2019-01-03 17:14:28 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-16 10:29:49 +0100 |
| commit | c6170b81e7b78942cb4b36fc72cbd75145fd08d5 (patch) | |
| tree | e45a4c8fb8dc8357dc6ee8d5995d7f8de71fd10e /Documentation | |
| parent | 61524f1bccc041b7871a21984b69b8e538f446c0 (diff) | |
kvm: Convert kvm_lock to a mutex
commit 0d9ce162cf46c99628cc5da9510b959c7976735b upstream.
It doesn't seem as if there is any particular need for kvm_lock to be a
spinlock, so convert the lock to a mutex so that sleepable functions (in
particular cond_resched()) can be called while holding it.
Signed-off-by: Junaid Shahid <junaids@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
[bwh: Backported to 4.9:
- Drop changes in kvm_hyperv_tsc_notifier(), vm_stat_clear(),
vcpu_stat_clear(), kvm_uevent_notify_change()
- Adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/virtual/kvm/locking.txt | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/virtual/kvm/locking.txt b/Documentation/virtual/kvm/locking.txt index e5dd9f4d6100..46ef3680c8ab 100644 --- a/Documentation/virtual/kvm/locking.txt +++ b/Documentation/virtual/kvm/locking.txt @@ -13,8 +13,8 @@ The acquisition orders for mutexes are as follows: - kvm->slots_lock is taken outside kvm->irq_lock, though acquiring them together is quite rare. -For spinlocks, kvm_lock is taken outside kvm->mmu_lock. Everything -else is a leaf: no other lock is taken inside the critical sections. +Everything else is a leaf: no other lock is taken inside the critical +sections. 2: Exception ------------ @@ -142,7 +142,7 @@ See the comments in spte_has_volatile_bits() and mmu_spte_update(). ------------ Name: kvm_lock -Type: spinlock_t +Type: mutex Arch: any Protects: - vm_list |