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docs: mention thread pool option for virtiofsd

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Signed-off-by: Wei Liu <liuwe@microsoft.com>
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Wei Liu 2022-08-03 18:49:25 +00:00 committed by Liu Wei
parent 103494f441
commit 1a09381d1e
1 changed files with 6 additions and 1 deletions
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docs/fs.md
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@ -32,7 +32,8 @@ _Run virtiofsd_
--log-level debug \
--socket-path=/tmp/virtiofs \
--shared-dir=/tmp/shared_dir \
--cache=never
--cache=never \
--thread-pool-size=$N
```
The `cache=never` option is the default when using `virtiofsd` with
@ -44,6 +45,10 @@ The `cache=always` option will allow the host page cache to be used, which can
result in better performance for the guest's workload at the cost of increasing
the footprint on host memory.
The `thread-pool-size` option controls how many IO threads are spawned. For
very fast storage like NVMe spawning enough worker threads is critical to
getting an acceptable performance compared to native.
### Kernel support
Modern Linux kernels (at least v5.10) have support for virtio-fs. Use of older