lkml.org 
[lkml]   [2017]   [Jan]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [HMM v15 01/16] mm/free_hot_cold_page: catch ZONE_DEVICE pages
From
Date
On 01/09/2017 01:19 AM, Balbir Singh wrote:
>> + /*
>> + * This should never happen ! Page from ZONE_DEVICE always must have an
>> + * active refcount. Complain about it and try to restore the refcount.
>> + */
>> + if (is_zone_device_page(page)) {
>> + VM_BUG_ON_PAGE(is_zone_device_page(page), page);
> This can be VM_BUG_ON_PAGE(1, page), hopefully the compiler does the right thing
> here. I suspect this should be a BUG_ON, independent of CONFIG_DEBUG_VM

BUG_ON() means "kill the machine dead". Do we really want a guaranteed
dead machine if someone screws up their refcounting?

\
 
 \ /
  Last update: 2017-01-09 17:23    [W:0.073 / U:2.200 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site