lkml.org 
[lkml]   [2021]   [Dec]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [rcf/patch] netpoll: Make it RT friendly
From
Date
On Wed, 2021-12-15 at 17:06 +0100, Sebastian Andrzej Siewior wrote:
>
> What is the context for netpoll_send_skb()? Why do we need to disable BH
> + RCU on RT?

Because rcu_dereference_bh() says it better be, but..

> If interrupts are never disabled, doesn't this break the assumption made
> in netpoll_tx_running()?
>
> queue_process() is also busted.

..that makes it kinda moot, and wasn't unexpected. It works, or at
least netconsole does, and lockdep was fine with it, but I figured it
unlikely to fly. In fact, I had already taken the silence as a "Surely
you jest" or such.

-Mike

\
 
 \ /
  Last update: 2021-12-15 20:55    [W:0.911 / U:0.104 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site