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| author | thomas knych <thomaswk@google.com> | 2014-01-09 13:14:23 -0800 |
|---|---|---|
| committer | Michael Roth <mdroth@linux.vnet.ibm.com> | 2014-02-21 00:34:41 -0600 |
| commit | 47c6edce7a2ed614bfe40c5d542275330975d1b6 (patch) | |
| tree | 421701194e8ef091f957daf9eff29769eb9cdbef /coroutine-sigaltstack.c | |
| parent | a5221ee1430928ac013f9723134dacb62359247e (diff) | |
KVM: Retry KVM_CREATE_VM on EINTR
Upstreaming this change from Android (https://android-review.googlesource.com/54211).
On heavily loaded machines with many VM instances we see KVM_CREATE_VM
failing with EINTR on this path:
kvm_dev_ioctl_create_vm -> kvm_create_vm -> kvm_init_mmu_notifier -> mmu_notifier_register -> do_mmu_notifier_register -> mm_take_all_locks
which checks if any signals have been raised while it was attaining locks
and returns EINTR. Retrying the system call greatly improves reliability.
Cc: qemu-stable@nongnu.org
Signed-off-by: thomas knych <thomaswk@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 94ccff133820552a859c0fb95e33a539e0b90a75)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Diffstat (limited to 'coroutine-sigaltstack.c')
0 files changed, 0 insertions, 0 deletions