From: "H. Peter Anvin" <hpa@linux.intel.com>
To: Linus Torvalds <torvalds@linux-foundation.org>,
Stefani Seibold <stefani@seibold.net>
Cc: Andy Lutomirski <luto@amacapital.net>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
the arch/x86 maintainers <x86@kernel.org>,
Dave Jones <davej@redhat.com>,
Martin Runge <Martin.Runge@rohde-schwarz.com>,
Andreas Brief <Andreas.Brief@rohde-schwarz.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: Re: [PATCH v2] x86: Remove compat vdso support
Date: Wed, 12 Mar 2014 14:37:47 -0700 [thread overview]
Message-ID: <5320D3AB.5060002@linux.intel.com> (raw)
In-Reply-To: <CA+55aFyhS5jCWcxuK4bXKEPh+8HWbPE+gy1m4N9B-2HyT48+QA@mail.gmail.com>
On 03/12/2014 12:41 PM, Linus Torvalds wrote:
>
> So my reaction was "don't do that".
>
> But people pointing out that we can't do what x86-64 does made me
> think: we could avoid the whole "nasty code for a legacy case" by
> making it the *non*-legacy case. We could get rid of the fixmap
> HPET/VVAR entirely - on x86-64 (which can use those addresses) a
> PC-relative addressing is probably actually better anyway, so mapping
> them together with the vdso code shouldn't hurt.
>
How would that deal with the legacy vsyscall case for x86-64? Just rely
on the "legacy vsyscall emulation" (which seems to have its own class of
problems...)?
-hpa
next prev parent reply other threads:[~2014-03-12 21:37 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-11 1:03 [PATCH v2] x86: Remove compat vdso support Andy Lutomirski
2014-03-11 1:39 ` Linus Torvalds
2014-03-11 2:37 ` Andy Lutomirski
2014-03-11 3:09 ` Linus Torvalds
2014-03-11 4:10 ` Andy Lutomirski
2014-03-11 8:37 ` Ingo Molnar
2014-03-11 9:36 ` Linus Torvalds
2014-03-11 14:53 ` Andy Lutomirski
2014-03-11 15:30 ` Linus Torvalds
2014-03-11 16:14 ` H. Peter Anvin
2014-03-11 16:30 ` Linus Torvalds
2014-03-11 16:42 ` Andy Lutomirski
2014-03-11 16:42 ` H. Peter Anvin
2014-03-11 16:45 ` Andy Lutomirski
2014-03-11 16:50 ` Andy Lutomirski
2014-03-11 16:52 ` H. Peter Anvin
2014-03-11 17:09 ` Linus Torvalds
2014-03-11 17:14 ` H. Peter Anvin
2014-03-11 17:16 ` Andy Lutomirski
2014-03-12 8:30 ` Stefani Seibold
2014-03-12 14:41 ` Linus Torvalds
2014-03-12 15:46 ` Linus Torvalds
2014-03-12 16:04 ` Linus Torvalds
2014-03-12 16:18 ` Brian Gerst
2014-03-12 16:18 ` Andy Lutomirski
2014-03-12 19:41 ` Linus Torvalds
2014-03-12 20:52 ` Andy Lutomirski
2014-03-12 21:37 ` H. Peter Anvin [this message]
2014-03-12 21:45 ` Andy Lutomirski
2014-03-12 21:46 ` Linus Torvalds
2014-03-12 21:49 ` Andy Lutomirski
2014-03-12 23:06 ` H. Peter Anvin
2014-03-12 23:43 ` Andy Lutomirski
2014-03-12 23:46 ` H. Peter Anvin
2014-03-13 16:23 ` Thomas Gleixner
2014-03-12 13:55 ` One Thousand Gnomes
2014-03-13 7:08 ` George Spelvin
2014-03-11 17:03 ` H. Peter Anvin
2014-03-11 17:07 ` Linus Torvalds
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