osd: mClock default_min reservation should be 0

All the mClock profiles enforce no minimum reservation for the background best-effort client.
For this purpose, the default_min value should 0 and not 1.

Signed-off-by: Aishwarya Mathuria <[email protected]>

Author: amathuria

src/osd/scheduler/mClockScheduler.h

@@ -33,7 +33,7 @@
 
 namespace ceph::osd::scheduler {
 
-constexpr double default_min = 1.0;
+constexpr double default_min = 0.0;
 constexpr double default_max = std::numeric_limits<double>::is_iec559 ?
   std::numeric_limits<double>::infinity() :
   std::numeric_limits<double>::max();