lkml.org 
[lkml]   [2020]   [Aug]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: file metadata via fs API (was: [GIT PULL] Filesystem Information)
Date
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

\
 
 \ /
  Last update: 2020-08-12 10:30    [W:0.298 / U:0.260 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site