Hi,

In mapper.c  file of Ceph CRUSH, I am trying to understand the definition of a linux macro  ```S64_MIN``` used in the  following  ```else``` condition i.e. ```draw = S64_MIN```.

 
Which exact decimal value is meant here for ```S64_MIN```?

```
if (weights[i])
          {
u = hash(bucket->h.hash, x, ids[i], r);
u &= 0xffff;
ln = crush_ln(u) - 0x1000000000000ll;

__s64 draw = div64_s64(ln, weights[i]);
}
else  
       {
__s64 draw = S64_MIN;  
           
          // #define S64_MAX    ((s64)(U64_MAX >> 1))
          // #define S64_MIN ((s64)(-S64_MAX -1))
  }
if (i == 0 || draw > high_draw)
           
          {
high = i;
high_draw = draw;
 }
}
return bucket->h.items[high];
}

Thanks

Bobby !