On 3/8/22 10:47 PM, Olivier Langlois wrote: > On Tue, 2022-03-08 at 17:54 -0700, Jens Axboe wrote: >> On 3/8/22 3:17 PM, Olivier Langlois wrote: >>> The sqpoll thread can be used for performing the napi busy poll in >>> a >>> similar way that it does io polling for file systems supporting >>> direct >>> access bypassing the page cache. >>> >>> The other way that io_uring can be used for napi busy poll is by >>> calling io_uring_enter() to get events. >>> >>> If the user specify a timeout value, it is distributed between >>> polling >>> and sleeping by using the systemwide setting >>> /proc/sys/net/core/busy_poll. >> >> I think we should get this queued up, but it doesn't apply to >> for-5.18/io_uring at all. I can fix it up, but just curious what you >> tested against? >> > Hi Jens, > > I did wrote the patch from > git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > > My testing systems are based on 5.16. I have backported the patch and > compiled 5.16.12 with the patch for my testing. > > sorry if I didn't use the right repo... Generally, since the patch is for 5.18, you'd want to base it on my for-5.18/io_uring branch as then it would apply on top of what is already pending. But I'll see if I can shoe horn it, unfortunately we'll hit a merge error but it'll be minor. -- Jens Axboe
