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 !
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