lkml.org 
[lkml]   [2019]   [Jul]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2 1/2] pidfd: add P_PIDFD to waitid()
On Sat, Jul 27, 2019 at 09:28:40AM -0700, Linus Torvalds wrote:

> is the stupid and straightforward thing, but if you want to be
> *clever* you can actually avoid getting a reference to the 'struct
> file *" entirely, and do the fd->pid lookup under rcu_read_lock()
> instead. It's slightly more complex, but it avoids the fdget/fdput
> reference count games entirely.

Yecchhh... Please, don't do the last part - at least not unless
we really see that in profiles.

\
 
 \ /
  Last update: 2019-07-27 18:49    [W:0.047 / U:8.604 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site