diff options
Diffstat (limited to 'rts/Capability.h')
| -rw-r--r-- | rts/Capability.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/rts/Capability.h b/rts/Capability.h index ba0695c8ee..77132e318e 100644 --- a/rts/Capability.h +++ b/rts/Capability.h @@ -65,10 +65,12 @@ struct Capability_ { Task *suspended_ccalling_tasks; // One mutable list per generation, so we don't need to take any - // locks when updating an old-generation thunk. These - // mini-mut-lists are moved onto the respective gen->mut_list at - // each GC. + // locks when updating an old-generation thunk. This also lets us + // keep track of which closures this CPU has been mutating, so we + // can traverse them using the right thread during GC and avoid + // unnecessarily moving the data from one cache to another. bdescr **mut_lists; + bdescr **saved_mut_lists; // tmp use during GC // Context switch flag. We used to have one global flag, now one // per capability. Locks required : none (conflicts are harmless) |