lkml.org 
[lkml]   [2015]   [Mar]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 3/4] x86: save user rsp in pt_regs->sp on SYSCALL64 fastpath

* Denys Vlasenko <vda.linux@googlemail.com> wrote:

> > - but making it slower without really good reasons isn't good.
>
> The thinking here is that cleaning up entry.S is a good reason.
>
> We won't do anything which would slow it down by, say, 5%,
> but one cycle may be considered acceptable loss.

Ok, so I've applied this particular cleanup, in the hope that we can
recover those cycles on the now cleaner base.

If that doesn't work out then we can still re-introduce this
complication and see its maintainability in isolation, on a clean
base.

Thanks,

Ingo


\
 
 \ /
  Last update: 2015-03-16 11:01    [W:0.410 / U:0.104 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site