diff options
| -rw-r--r-- | softmmu/dirtylimit.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/softmmu/dirtylimit.c b/softmmu/dirtylimit.c index 82986c1499..71bf6dc7a4 100644 --- a/softmmu/dirtylimit.c +++ b/softmmu/dirtylimit.c @@ -232,18 +232,23 @@ bool dirtylimit_vcpu_index_valid(int cpu_index) cpu_index >= ms->smp.max_cpus); } -static inline int64_t dirtylimit_dirty_ring_full_time(uint64_t dirtyrate) +static uint64_t dirtylimit_dirty_ring_full_time(uint64_t dirtyrate) { static uint64_t max_dirtyrate; - uint32_t dirty_ring_size = kvm_dirty_ring_size(); - uint64_t dirty_ring_size_meory_MB = - dirty_ring_size * qemu_target_page_size() >> 20; + unsigned target_page_bits = qemu_target_page_bits(); + uint64_t dirty_ring_size_MB; + + /* So far, the largest (non-huge) page size is 64k, i.e. 16 bits. */ + assert(target_page_bits < 20); + + /* Convert ring size (pages) to MiB (2**20). */ + dirty_ring_size_MB = kvm_dirty_ring_size() >> (20 - target_page_bits); if (max_dirtyrate < dirtyrate) { max_dirtyrate = dirtyrate; } - return dirty_ring_size_meory_MB * 1000000 / max_dirtyrate; + return dirty_ring_size_MB * 1000000 / max_dirtyrate; } static inline bool dirtylimit_done(uint64_t quota, |