On Thu, Jun 22, 2023 at 3:34 AM Wols Lists <antlists@xxxxxxxxxxxxxxx> wrote: > > On 21/06/2023 09:05, Xiao Ni wrote: > > Cool. And I noticed you mentioned 'fast path' in many places. What's > > the meaning of 'fast path'? Does it mean the path that i/os are > > submitting? > > It's a pretty generic kernel term, used everywhere. It's intended to be > the normal route for whatever is going on, but it must ALWAYS ALWAYS > ALWAYS be optimised for speed. > > If it hits a problem, it must back out and use the "slow path", which > can wait, block, whatever. > > So the idea is that all your operations normally complete straight away, > but if they can't they go into a different path that guarantees they > complete, but don't block the normal operation of the system. > > Cheers, > Wol > Hi Wol Thanks for the explanation! Regards Xiao
