lkml.org 
[lkml]   [2018]   [Aug]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH RFC 01/10] rcu: Make CONFIG_SRCU unconditionally enabled
On Wed, Aug 08, 2018 at 01:17:44PM +0300, Kirill Tkhai wrote:
> On 08.08.2018 10:20, Michal Hocko wrote:
> > On Tue 07-08-18 18:37:36, Kirill Tkhai wrote:
> >> This patch kills all CONFIG_SRCU defines and
> >> the code under !CONFIG_SRCU.
> >
> > The last time somebody tried to do this there was a pushback due to
> > kernel tinyfication. So this should really give some numbers about the
> > code size increase. Also why can't we make this depend on MMU. Is
> > anybody else than the reclaim asking for unconditional SRCU usage?
>
> I don't know one. The size numbers (sparc64) are:
>
> $ size image.srcu.disabled
> text data bss dec hex filename
> 5117546 8030506 1968104 15116156 e6a77c image.srcu.disabled
> $ size image.srcu.enabled
> text data bss dec hex filename
> 5126175 8064346 1968104 15158625 e74d61 image.srcu.enabled
> The difference is: 15158625-15116156 = 42469 ~41Kb

41k is a *substantial* size increase. However, can you compare
tinyconfig with and without this patch? That may have a smaller change.

\
 
 \ /
  Last update: 2018-08-08 18:18    [W:0.081 / U:2.532 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site