lkml.org 
[lkml]   [2018]   [Dec]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC PATCH 1/1] epoll: use rwlock in order to reduce ep_poll_callback() contention
>On 12/3/18 6:02 AM, Roman Penyaev wrote:

>> if (!ep_is_linked(epi)) {
>> - list_add_tail(&epi->rdllink, &ep->rdllist);
>> + /* Reverse ->ovflist, events should be in FIFO */
>> + list_add(&epi->rdllink, &ep->rdllist);
>> ep_pm_stay_awake(epi);
>> }

This should probably a separate patch as it fixes the ordering,
regardless of the rwlock+xchg optimization.

Thanks,
Davidlohr

\
 
 \ /
  Last update: 2018-12-06 04:08    [W:0.250 / U:8.556 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site