Toot

Written by AndresFreundTec on 2025-01-02 at 22:23

@axboe Doing concurrent direct IO into 1GB anonymous huge pages hits severe contention within bio_set_pages_dirty().

In my case this makes IO into 1GB pages max out at ~18GB/s, whereas 2MB huge pages reaches ~34GB/s (the hardware limit).

Is this even needed when anon huge pages are targeted?

https://gist.github.com/anarazel/304aa6b81d05feb3f4990b467d02dabc

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