lkml.org 
[lkml]   [2014]   [Aug]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH 4/5] x86: entry_64.S: always allocate complete "struct pt_regs"
On Fri, Aug 1, 2014 at 7:04 PM, Andy Lutomirski <luto@amacapital.net> wrote:
> On Fri, Aug 1, 2014 at 7:48 AM, Denys Vlasenko <dvlasenk@redhat.com> wrote:
>> 64-bit code was using six stack slots fewer by not saving/restoring
>> registers which a callee-preserved according to C ABI,
>> and not allocating space for them
>
> This is great.
>
> Next up: remove FIXUP/RESTORE_TOP_OF_STACK? :) Maybe I'll give that a shot.

I'm yet at the stage "what that stuff does anyway?" and at
"why do we need percpu old_rsp thingy?" in particular.


\
 
 \ /
  Last update: 2014-08-04 17:01    [W:0.184 / U:0.744 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site