From: Ingo Molnar <mingo@elte.hu>
To: pageexec@freemail.hu
Cc: Andrew Lutomirski <luto@mit.edu>,
x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org, Jesper Juhl <jj@chaosbits.net>,
Borislav Petkov <bp@alien8.de>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Arjan van de Ven <arjan@infradead.org>,
Jan Beulich <JBeulich@novell.com>,
richard -rw- weinberger <richard.weinberger@gmail.com>,
Mikael Pettersson <mikpe@it.uu.se>,
Andi Kleen <andi@firstfloor.org>, Brian Gerst <brgerst@gmail.com>,
Louis Rilling <Louis.Rilling@kerlabs.com>,
Valdis.Kletnieks@vt.edu
Subject: Re: [PATCH v5 8/9] x86-64: Emulate legacy vsyscalls
Date: Wed, 8 Jun 2011 08:48:57 +0200 [thread overview]
Message-ID: <20110608064857.GA6747@elte.hu> (raw)
In-Reply-To: <4DEEB31B.3353.19E649C2@pageexec.freemail.hu>
* pageexec@freemail.hu <pageexec@freemail.hu> wrote:
> On 7 Jun 2011 at 10:30, Ingo Molnar wrote:
>
> >
> > * pageexec@freemail.hu <pageexec@freemail.hu> wrote:
> >
> > > > A fastpath is defined by optimization considerations applied
> > > > to a codepath (the priority it gets compared to other
> > > > codepaths), *not* by its absolute performance.
> > >
> > > we're not talking about random arbitrarily defined paths here
> > > but the impact of putting well predicted branches into the pf
> > > handler vs. int xx (are you perhaps confused by 'fast path' vs.
> > > 'fastpath'?).
> >
> > So please educate me, what is the difference between 'fast path'
> > versus 'fastpath', as used by kernel developers, beyond the
> > space?
>
> you seemed to have made a distinction, you tell me ;), [...]
I have not made any distinction at all, *you* wrote:
> > > (are you perhaps confused by 'fast path' vs. 'fastpath'?).
and several people have asked you why you wrote that and you have not
replied to any of those questions yet.
Thanks,
Ingo
next prev parent reply other threads:[~2011-06-08 6:49 UTC|newest]
Thread overview: 112+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-05 17:50 [PATCH v5 0/9] Remove syscall instructions at fixed addresses Andy Lutomirski
2011-06-05 17:50 ` [PATCH v5 1/9] x86-64: Fix alignment of jiffies variable Andy Lutomirski
2011-06-06 8:31 ` [tip:x86/vdso] " tip-bot for Andy Lutomirski
2011-06-05 17:50 ` [PATCH v5 2/9] x86-64: Document some of entry_64.S Andy Lutomirski
2011-06-06 8:31 ` [tip:x86/vdso] " tip-bot for Andy Lutomirski
2011-06-05 17:50 ` [PATCH v5 3/9] x86-64: Give vvars their own page Andy Lutomirski
2011-06-06 8:32 ` [tip:x86/vdso] " tip-bot for Andy Lutomirski
2011-06-05 17:50 ` [PATCH v5 4/9] x86-64: Remove kernel.vsyscall64 sysctl Andy Lutomirski
2011-06-06 8:32 ` [tip:x86/vdso] " tip-bot for Andy Lutomirski
2011-12-05 18:27 ` [PATCH v5 4/9] " Matthew Maurer
2011-06-05 17:50 ` [PATCH v5 5/9] x86-64: Map the HPET NX Andy Lutomirski
2011-06-06 8:33 ` [tip:x86/vdso] " tip-bot for Andy Lutomirski
2011-06-05 17:50 ` [PATCH v5 6/9] x86-64: Remove vsyscall number 3 (venosys) Andy Lutomirski
2011-06-06 8:33 ` [tip:x86/vdso] " tip-bot for Andy Lutomirski
2011-06-05 17:50 ` [PATCH v5 7/9] x86-64: Fill unused parts of the vsyscall page with 0xcc Andy Lutomirski
2011-06-06 8:34 ` [tip:x86/vdso] " tip-bot for Andy Lutomirski
2011-06-05 17:50 ` [PATCH v5 8/9] x86-64: Emulate legacy vsyscalls Andy Lutomirski
2011-06-05 19:30 ` Ingo Molnar
2011-06-05 20:01 ` Andrew Lutomirski
2011-06-06 7:39 ` Ingo Molnar
2011-06-06 9:42 ` pageexec
2011-06-06 11:19 ` Andrew Lutomirski
2011-06-06 11:56 ` pageexec
2011-06-06 12:43 ` Andrew Lutomirski
2011-06-06 13:58 ` pageexec
2011-06-06 14:07 ` Brian Gerst
2011-06-07 23:32 ` pageexec
2011-06-07 23:49 ` Andrew Lutomirski
2011-06-08 6:32 ` pageexec
2011-06-06 15:26 ` Ingo Molnar
2011-06-06 15:48 ` pageexec
2011-06-06 15:59 ` Ingo Molnar
2011-06-06 16:19 ` pageexec
2011-06-06 16:47 ` Ingo Molnar
2011-06-06 22:49 ` pageexec
2011-06-06 22:57 ` david
2011-06-07 9:07 ` Ingo Molnar
2011-06-07 6:59 ` Pekka Enberg
2011-06-07 8:30 ` Ingo Molnar
2011-06-07 23:24 ` pageexec
2011-06-08 5:55 ` Pekka Enberg
2011-06-08 6:19 ` pageexec
2011-06-08 6:48 ` Ingo Molnar [this message]
2011-06-08 9:02 ` pageexec
2011-06-08 9:11 ` Andi Kleen
2011-06-08 9:35 ` pageexec
2011-06-08 10:06 ` Andi Kleen
2011-06-08 10:26 ` pageexec
2011-06-08 10:39 ` Ingo Molnar
2011-06-08 10:35 ` Ingo Molnar
2011-06-08 9:15 ` Ingo Molnar
2011-06-08 7:16 ` Ingo Molnar
2011-06-08 9:29 ` pageexec
2011-06-06 14:01 ` Linus Torvalds
2011-06-06 14:55 ` pageexec
2011-06-06 15:33 ` Ingo Molnar
2011-06-06 15:58 ` pageexec
2011-06-06 15:41 ` Ingo Molnar
2011-06-06 8:34 ` [tip:x86/vdso] " tip-bot for Andy Lutomirski
2011-06-06 8:35 ` [tip:x86/vdso] x86-64, vdso, seccomp: Fix !CONFIG_SECCOMP build tip-bot for Ingo Molnar
2011-06-07 7:49 ` [tip:x86/vdso] x86-64: Emulate legacy vsyscalls tip-bot for Andy Lutomirski
2011-06-07 8:03 ` tip-bot for Andy Lutomirski
2011-06-05 17:50 ` [PATCH v5 9/9] x86-64: Add CONFIG_UNSAFE_VSYSCALLS to feature-removal-schedule Andy Lutomirski
2011-06-06 8:34 ` [tip:x86/vdso] " tip-bot for Andy Lutomirski
2011-06-06 8:46 ` [PATCH v5 9/9] " Linus Torvalds
2011-06-06 9:31 ` Andi Kleen
2011-06-06 10:39 ` pageexec
2011-06-06 13:56 ` Linus Torvalds
2011-06-06 18:46 ` pageexec
2011-06-06 20:40 ` Linus Torvalds
2011-06-06 20:51 ` Andrew Lutomirski
2011-06-06 21:54 ` Ingo Molnar
2011-06-06 21:45 ` Ingo Molnar
2011-06-06 21:48 ` Ingo Molnar
[not found] ` <BANLkTi==uw_h78oaep1cCOCzwY0edLUU_Q@mail.gmail.com>
2011-06-07 8:03 ` [PATCH, v6] x86-64: Emulate legacy vsyscalls Ingo Molnar
2011-06-06 21:53 ` [PATCH v5 9/9] x86-64: Add CONFIG_UNSAFE_VSYSCALLS to feature-removal-schedule pageexec
2011-06-06 14:44 ` Ingo Molnar
2011-06-06 15:01 ` pageexec
2011-06-06 15:15 ` Ingo Molnar
2011-06-06 15:29 ` pageexec
2011-06-06 16:54 ` Ingo Molnar
2011-06-06 18:59 ` pageexec
2011-06-06 19:25 ` Ingo Molnar
2011-06-07 0:34 ` pageexec
2011-06-07 9:51 ` Ingo Molnar
2011-06-07 23:24 ` pageexec
2011-06-10 11:19 ` Ingo Molnar
2011-06-14 0:48 ` pageexec
2011-06-15 19:42 ` Valdis.Kletnieks
2011-06-06 14:52 ` Ingo Molnar
2011-06-06 10:24 ` [PATCH] x86-64, vsyscalls: Rename UNSAFE_VSYSCALLS to COMPAT_VSYSCALLS Ingo Molnar
2011-06-06 11:20 ` pageexec
2011-06-06 12:47 ` Ingo Molnar
2011-06-06 12:48 ` Ingo Molnar
2011-06-06 18:04 ` pageexec
2011-06-06 19:12 ` Ingo Molnar
2011-06-07 0:02 ` pageexec
2011-06-07 9:56 ` Ingo Molnar
2011-06-07 23:24 ` pageexec
2011-06-09 6:48 ` Ingo Molnar
2011-06-09 23:33 ` pageexec
2011-06-07 10:05 ` Ingo Molnar
2011-06-07 23:24 ` pageexec
2011-06-09 7:02 ` Ingo Molnar
2011-06-09 23:33 ` pageexec
2011-06-07 10:13 ` Ingo Molnar
2011-06-07 23:24 ` pageexec
2011-06-06 12:19 ` Ted Ts'o
2011-06-06 12:33 ` Andrew Lutomirski
2011-06-06 12:37 ` Ingo Molnar
2011-06-06 14:34 ` [tip:x86/vdso] " tip-bot for Ingo Molnar
2011-06-05 20:05 ` [PATCH v5 0/9] Remove syscall instructions at fixed addresses Andrew Lutomirski
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