NVMe driver: use an extra # for non-title headers

Signed-off-by: Miguel Ojeda <[email protected]>

Author: ojeda

src/NVMe-driver.md

@@ -18,101 +18,101 @@ authored by Wedson Almeida Filho and is now maintained by Andreas Hindborg
 
 The driver is not currently suitable for general use.
 
-# Resources
+## Resources
  - LPC 2022
    [slides](https://lpc.events/event/16/contributions/1180/attachments/1017/1961/deck.pdf)
    and [video](https://lpc.events/event/16/contributions/1180/attachments/1017/2249/go)
 
-# 6.7 Rebase Performance ([`nvme-6.7`](https://github.com/metaspace/linux/tree/nvme-6.7))
+## 6.7 Rebase Performance ([`nvme-6.7`](https://github.com/metaspace/linux/tree/nvme-6.7))
 
-## Setup
+### Setup
 
  - 12th Gen Intel(R) Core(TM) i5-12600
  - 32 GB DRAM
  - 1x INTEL MEMPEK1W016GA (PCIe 3.0 x2)
  - Debian Bullseye userspace
  - LTO results are enabled by a build system patch (a hack) that was not yet published.
 
-## Results
+### Results
 
 - 30 samples
 - Difference of means modeled with t-distribution
 - P99 confidence intervals
 
 ![](rnvme/nvme-all-6.7.svg)
 
-### Difference Relative
+#### Difference Relative
 
 Plot shows `(mean_iops_r - mean_iops_c) / mean_iops_c`'
 
 ![](rnvme/nvme-diff-relative-6.7.svg)
 
-# Performance November 2023 ([`nvme-6.6`](https://github.com/metaspace/linux/tree/nvme-6.6))
+## Performance November 2023 ([`nvme-6.6`](https://github.com/metaspace/linux/tree/nvme-6.6))
 
-## Setup
+### Setup
 
  - 12th Gen Intel(R) Core(TM) i5-12600
  - 32 GB DRAM
  - 1x INTEL MEMPEK1W016GA (PCIe 3.0 x2)
  - Debian Bullseye userspace
  - LTO results are enabled by a build system patch (a hack) that was not yet published.
 
-## Results
+### Results
 
 - 30 samples
 - Difference of means modeled with t-distribution
 - P99 confidence intervals
 
 ![](rnvme/nvme-all-6.6.svg)
 
-### Difference
+#### Difference
 
 ![](rnvme/nvme-diff-6.6.svg)
 
-### Difference Relative
+#### Difference Relative
 
 Plot shows `(mean_iops_r - mean_iops_c) / mean_iops_c`'
 
 ![](rnvme/nvme-diff-relative-6.6.svg)
 
-# Performance September 2023
+## Performance September 2023
 
 The driver was
 [rebased](https://github.com/metaspace/linux/tree/7353a81d566510080f91099b1a2b31895c716c9d)
 on top of
 [`rust-next`](https://github.com/Rust-for-Linux/linux/commit/37152d4a7c6400a4250134e601eca8be1a2bbc16)
 PR for 6.6 in September 2023.
 
-## Setup
+### Setup
 
  - 12th Gen Intel(R) Core(TM) i5-12600
  - 32 GB DRAM
  - 1x INTEL MEMPEK1W016GA (PCIe 3.0 x2)
  - Debian Bullseye userspace
 
-## Results
+### Results
 
 ![iops-512](./nvme-512.svg)
 ![iops-all](./nvme-all.svg)
 
-# Performance January 2023
+## Performance January 2023
 
 Performance evaluation as of January 2023.
 
-## Setup
+### Setup
 
 - Dell PowerEdge R6525
 - 1 CPU socket populated - EPYC 7313, 16 cores
 - 128 GB DRAM
 - 3x P5800x 16GT/s x4 7.88 GB/s (PCIe 4)
 - Debian bullseye (linux 5.19.0+)
 
-## Results
+### Results
 
 ![iops](./iops.svg)
 ![relative](./relative.svg)
 
-## Analysis
+### Analysis
 
 For 4 KiB block size, the Rust NVMe driver performs similar to the C driver. For
 this configuration the target drive is bandwidth limited.
@@ -121,7 +121,7 @@ For 512 B block size, the C driver outperforms the Rust driver by up to 6%. In
 this configuration the drive is not bandwidth limited, but the benchmark becomes
 compute limited. The Rust driver has a higher overhead and thus performs worse.
 
-# Work Items
+## Work Items
 
   - Remove all unsafe code from the driver
   - Support device removal
@@ -130,7 +130,7 @@ compute limited. The Rust driver has a higher overhead and thus performs worse.
   - Support more kernel configurations by deferring initialization to a task queue
   - Improve performance of Rust NVMe driver
 
-# Contact
+## Contact
 
 Please contact Andreas Hindborg through
 [Zulip](Contact.md#zulip-chat).