lkml.org 
[lkml]   [2020]   [Aug]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH 13/17] watch_queue: Implement mount topology and attribute change notifications [ver #5]
On Wed, Aug 5, 2020 at 3:54 AM Ian Kent <raven@themaw.net> wrote:
>

> > > It's way more useful to have these in the notification than
> > > obtainable
> > > via fsinfo() IMHO.
> >
> > What is it useful for?
>
> Only to verify that you have seen all the notifications.
>
> If you have to grab that info with a separate call then the count
> isn't necessarily consistent because other notifications can occur
> while you grab it.

No, no no. The watch queue will signal an overflow, without any
additional overhead for the normal case. If you think of this as a
protocol stack, then the overflow detection happens on the transport
layer, instead of the application layer. The application layer is
responsible for restoring state in case of a transport layer error,
but detection of that error is not the responsibility of the
application layer.


Thanks,
Miklos

\
 
 \ /
  Last update: 2020-08-05 09:44    [W:0.107 / U:0.196 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site