Hi Benny
Why do we have the complexity of waiting on a bit lock for allocating
a layout? Why can't we use the normal form:
take the i_lock
lookup layout
if (layout == NULL) {
give up i_lock
allocate and init new layout
return NULL if allocation fails
take the i_lock
lookup layout
if (layout == NULL)
set new layout for return
else
set found layout for return
}
give up i_lock
if new was allocated and not used
free the new layout
return layout
-->Andy
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