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Uncached Buffered IO Is Performing Great, Working Now On Btrfs / EXT4 / XFS
As covered last week Linux I/O expert Jens Axboe has been taking a fresh pursuit of uncached buffered I/O for Linux
In the patch series Axboe sums things up elegantly for those not following the latest progress or unfamiliar with the prior uncached buffered IO work with the RWF_UNCACHED flag: Even on desktop type systems, a normal NVMe device can fill the entire page cache in seconds. But the real kicker are the easy wins with ~65% faster read and write performance while also having lower CPU usage.
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