Special case for RMW with NullDevice to avoid issuing IO below HeadAd…

…dress. (#850) Similar to what is already done for Read.
microsoft · Jul 14, 2023 · 6217eaf · 6217eaf
1 parent 2025daa
commit 6217eaf
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/cs/src/core/Index/FASTER/Implementation/InternalRMW.cs b/cs/src/core/Index/FASTER/Implementation/InternalRMW.cs
@@ -139,6 +139,9 @@ internal OperationStatus InternalRMW<Input, Output, Context, FasterSession>(ref
                 }
                 else if (stackCtx.recSrc.LogicalAddress >= hlog.BeginAddress)
                 {
+                    if (hlog.IsNullDevice)
+                        goto CreateNewRecord;
+
                     // Disk Region: Need to issue async io requests. Locking will be checked on pending completion.
                     status = OperationStatus.RECORD_ON_DISK;
                     latchDestination = LatchDestination.CreatePendingContext;