rnull: add benchmark results for v6.12-rc2

Author: Andreas Hindborg

src/Null-Block-Driver.md

@@ -67,6 +67,30 @@ in this work:
  - [Mailing List Post](https://lore.kernel.org/all/20230503090708.2524310-1-nmi@metaspace.dk/)
  - [Subset merged in v6.11-rc1](https://lore.kernel.org/all/20240611114551.228679-1-nmi@metaspace.dk/)
 
+## 6.12-rc2 Rebase ([`rnull-v6.12-rc2`](https://git.kernel.org/pub/scm/linux/kernel/git/a.hindborg/linux.git/log/?h=rnull-v6.12-rc2))
+
+Changes from `rnull-v6.10`:
+
+ - Make `QueueData` references pinned.
+
+### Performance
+
+#### Setup
+
+ - AMD Ryzen 5 7600
+ - 32 GB 4800 MT/s DDR5 on one channel
+ - 1x Samsung 990 Pro 1TB (PCIe 4.0 x4 16 GT/S)
+ - NixOS 24.05
+
+#### Results
+
+- Plot shows `(mean_iops_r - mean_iops_c) / mean_iops_c`
+- 40 samples for each configuration
+- Difference of means modeled with t-distribution
+- P95 confidence intervals
+
+![](rnull/rnull-v6.12-rc2.svg)
+
 ## 6.11 Rebase ([`rnull-v6.11`](https://git.kernel.org/pub/scm/linux/kernel/git/a.hindborg/linux.git/log/?h=rnull-v6.11))
 
 Changes from `rnull-v6.10`: