linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Ingo Molnar <mingo@kernel.org>
To: Jan Beulich <JBeulich@suse.com>
Cc: tglx@linutronix.de, torvalds@linux-foundation.org,
	linux-kernel@vger.kernel.org, hpa@zytor.com
Subject: Re: [tip:x86/asm] x86: Prefer TZCNT over BFS
Date: Mon, 17 Sep 2012 12:00:46 +0200	[thread overview]
Message-ID: <20120917100046.GA32463@gmail.com> (raw)
In-Reply-To: <5056F04B020000780009BAF9@nat28.tlf.novell.com>


* Jan Beulich <JBeulich@suse.com> wrote:

> >>> On 14.09.12 at 23:14, Linus Torvalds <torvalds@linux-foundation.org> wrote:
> > On Thu, Sep 13, 2012 at 11:23 PM, tip-bot for Jan Beulich
> > <JBeulich@suse.com> wrote:
> >>
> >> x86: Prefer TZCNT over BFS
> > 
> > This patch is insane.
> 
> I'm not going to defend this simple and strait forward a patch 
> to such a reply, so Ingo, just drop it to please Linus, even 
> though I can't see what's _this_ bad about it.

Well, the problem is the complication of the dependencies, which 
obscures the logic and makes it hard to maintain going forward.

Linus's suggestion is to introduce CONFIG_X86_TZCNT as an add-on 
patch that cleans up and documents what this is all about.

Would you be willing to do such a patch?

Thanks,

	Ingo

  reply	other threads:[~2012-09-17 10:00 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-09-10 11:24 [PATCH] x86: prefer tzcnt over bsf Jan Beulich
2012-09-14  6:23 ` [tip:x86/asm] x86: Prefer TZCNT over BFS tip-bot for Jan Beulich
2012-09-14 21:14   ` Linus Torvalds
2012-09-14 21:32     ` Borislav Petkov
2012-09-17  7:41     ` Jan Beulich
2012-09-17 10:00       ` Ingo Molnar [this message]
2012-09-17 10:58         ` Jan Beulich
2012-09-17 17:00         ` Linus Torvalds
2012-09-17 17:05           ` H. Peter Anvin
2012-09-17 17:13             ` Linus Torvalds
2012-09-18  6:40             ` Jan Beulich

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20120917100046.GA32463@gmail.com \
    --to=mingo@kernel.org \
    --cc=JBeulich@suse.com \
    --cc=hpa@zytor.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=tglx@linutronix.de \
    --cc=torvalds@linux-foundation.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).