Messages in this thread | | | From | David Howells <> | Subject | Re: file metadata via fs API (was: [GIT PULL] Filesystem Information) | Date | Wed, 12 Aug 2020 09:29:09 +0100 |
| |
Miklos Szeredi <miklos@szeredi.hu> wrote:
> Worried about performance? Io-uring will allow you to do all those > five syscalls (or many more) with just one I/O submission.
io_uring isn't going to help here. We're talking about synchronous reads. AIUI, you're adding a couple more syscalls to the list and running stuff in a side thread to save the effort of going in and out of the kernel five times. But you still have to pay the set up/tear down costs on the fds and do the pathwalks. io_uring doesn't magically make that cost disappear.
io_uring also requires resources such as a kernel accessible ring buffer to make it work.
You're proposing making everything else more messy just to avoid a dedicated syscall. Could you please set out your reasoning for that?
David
| |