lkml.org 
[lkml]   [2016]   [May]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 6/6] mm/page_owner: use stackdepot to store stacktrace
On Wed 04-05-16 11:35:00, Joonsoo Kim wrote:
[...]
> Oops... I think more deeply and change my mind. In recursion case,
> stack is consumed more than 1KB and it would be a problem. I think
> that best approach is using preallocated per cpu entry. It will also
> close recursion detection issue by paying interrupt on/off overhead.

I was thinking about per-cpu solution as well but the thing is that the
stackdepot will allocate and until you drop __GFP_DIRECT_RECLAIM then
per-cpu is not safe. I haven't checked the implamentation of
depot_save_stack but I assume it will not schedule in other places.
--
Michal Hocko
SUSE Labs

\
 
 \ /
  Last update: 2016-05-04 11:41    [W:2.745 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site