From: "H. J. Lu" <hjl@lucon.org>
To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Cc: Ulrich Drepper <drepper@redhat.com>,
linux-mips@oss.sgi.com,
GNU C Library <libc-alpha@sources.redhat.com>
Subject: Re: PATCH: Always use ll/sc for mips
Date: Tue, 16 Jul 2002 08:42:08 -0700 [thread overview]
Message-ID: <20020716084208.A21699@lucon.org> (raw)
In-Reply-To: <Pine.GSO.3.96.1020716171505.20654S-100000@delta.ds2.pg.gda.pl>; from macro@ds2.pg.gda.pl on Tue, Jul 16, 2002 at 05:22:36PM +0200
On Tue, Jul 16, 2002 at 05:22:36PM +0200, Maciej W. Rozycki wrote:
> On 15 Jul 2002, Ulrich Drepper wrote:
>
> > > The ll/sc emulation is implemented in 2.4.0 and above. This patch makes
> > > glibc always use ll/sc.
> >
> > Since I haven't seen any objections I've checked this patch in.
>
> [I must have missed the original mail, sorry.]
>
> It sucks performance-wise with no visible gain, so I don't think it is
> really desireable. Since the no-ll/sc case is handled correctly, I see no
Only <sys/tas.h> is covered by the kernel interface. But it doesn't
cover atomicity.h in glibc and libstdc++.
> reason to remove the code. The kernel interface is awkward, I admit, but
> it works (and is even handcoded in assembly for performance gain) and we
> may able to develop a better one eventually.
>
H.J.
next prev parent reply other threads:[~2002-07-16 15:37 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-02 18:40 PATCH: Always use ll/sc for mips H. J. Lu
2002-07-02 20:06 ` Ralf Baechle
2002-07-02 21:04 ` H. J. Lu
2002-07-04 8:00 ` Maciej W. Rozycki
2002-07-04 8:47 ` Kevin D. Kissell
2002-07-04 8:47 ` Kevin D. Kissell
2002-07-04 13:57 ` Ralf Baechle
2002-07-04 14:14 ` Hiroyuki Machida
2002-07-08 17:21 ` Jun Sun
2002-07-08 17:34 ` Ralf Baechle
2002-07-16 0:59 ` Ulrich Drepper
2002-07-16 15:22 ` Maciej W. Rozycki
2002-07-16 15:42 ` H. J. Lu [this message]
2002-07-17 8:31 ` Maciej W. Rozycki
2002-07-17 15:01 ` H. J. Lu
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