[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <CALCETrWpj_=O_gYG9+8Cv7stqOX9pniGK0xkE3eOhWNPSuzwMg@mail.gmail.com>
Date: Tue, 14 Jun 2016 18:31:18 -0700
From: Andy Lutomirski <luto@...capital.net>
To: Brian Gerst <brgerst@...il.com>
Cc: X86 ML <x86@...nel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Ingo Molnar <mingo@...nel.org>,
"H. Peter Anvin" <hpa@...or.com>,
Denys Vlasenko <dvlasenk@...hat.com>,
Borislav Petkov <bp@...e.de>,
Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 3/4] x86: Rewrite switch_to() code
On Sat, May 21, 2016 at 9:04 AM, Brian Gerst <brgerst@...il.com> wrote:
> Move the low-level context switch code to an out-of-line asm stub instead of
> using complex inline asm. This allows constructing a new stack frame for the
> child process to make it seamlessly flow to ret_from_fork without an extra
> test and branch in __switch_to(). It also improves code generation for
> __schedule() by using the C calling convention instead of clobbering all
> registers.
Just a heads up: I'm writing some code that conflicts with this patch.
The conflict will be easy to resolve, and, if this patch beats mine to
-tip, I'll rebase.
--Andy
Powered by blists - more mailing lists