Thread: Question about RWF_DONTCACHE

Hi, everyone

I am writing to ask if the recently introduced RWF_DONTCACHE [0] (originally named RWF_UNCACHE) in the Linux kernel
willbe or is already supported by PostgreSQL? 

I am not sure if RWF_DONTCACHE will improve PostgreSQL performance. In fact, I think it may even degrade performance.
Hasanyone tested this? 

[0] https://lwn.net/ml/all/20241203153232.92224-2-axboe@kernel.dk/

Thanks, everyone.
Jinliang Zheng :)