lkml.org 
[lkml]   [2020]   [Jan]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] mm/page_counter: fix various data races
From
Date
On 2020/01/29 21:25, Qian Cai wrote:
>
>
>> On Jan 29, 2020, at 7:13 AM, Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> wrote:
>>
>> By the way, can READ_ONCE()/WRITE_ONCE() really solve this warning?
>> The link above says read/write on the same location ( mm/page_counter.c:129 ).
>> I don't know how READ_ONCE()/WRITE_ONCE() can solve the race.
>
> That looks like a different one where it complains about c->failcnt++. I’ll send a separate patch for that.
>

Ah, then this patch is meant for mm/page_counter.c:138 versus page_counter.c:139 race which was
closed as invalid at https://syzkaller.appspot.com/bug?id=871391ec080746185a2dd437c54d75fcd1ef0ef8 .

\
 
 \ /
  Last update: 2020-01-29 14:10    [W:0.075 / U:0.500 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site