From: "Kevin D. Kissell" <kevink@mips.com>
To: "Ralf Baechle" <ralf@linux-mips.org>,
"Sathesh Babu Edara" <satheshbabu.edara@analog.com>
Cc: <linux-mips-bounce@linux-mips.org>, <linux-mips@linux-mips.org>
Subject: Re: LL and SC instruction simulation
Date: Mon, 9 Jan 2006 16:17:50 +0100 [thread overview]
Message-ID: <00af01c6152f$dc1863f0$10eca8c0@grendel> (raw)
In-Reply-To: 20060109145425.GA4286@linux-mips.org
Ralf writes:
> On Mon, Jan 09, 2006 at 01:19:46PM +0530, Sathesh Babu Edara wrote:
>
> > We have ported linux-2.4.18 and linux-2-6.12 kernel (mips.org)onto MIPS
> > processor (CPU type lx4189).
> >
> > We observed that on 2.4 kernel,ll and sc instruction exception handlers
> > hitting very often.
> > Where as on linux-2.6.12 this is not happening.
>
> > Can anybody have idea why this instructions are hitting on 2.4.18 kernel and
> > not on 2-6.12 kernel.
>
> Only ll/sc instructions in application software can be emulated, so it
> would seem your application is behaving different on 2.4 and 2.6 kernels.
Is there an interface where 2.6 might be telling library code to use system calls
instead LL/SC, where the 2.4 kernel didn't?
Regards,
Kevin K.
WARNING: multiple messages have this Message-ID (diff)
From: "Kevin D. Kissell" <kevink@mips.com>
To: Ralf Baechle <ralf@linux-mips.org>,
Sathesh Babu Edara <satheshbabu.edara@analog.com>
Cc: linux-mips-bounce@linux-mips.org, linux-mips@linux-mips.org
Subject: Re: LL and SC instruction simulation
Date: Mon, 9 Jan 2006 16:17:50 +0100 [thread overview]
Message-ID: <00af01c6152f$dc1863f0$10eca8c0@grendel> (raw)
Message-ID: <20060109151750.Xib31AURvaCW1QEFsxusbzxRJqPIfqNimvwkQC0QsYk@z> (raw)
In-Reply-To: 20060109145425.GA4286@linux-mips.org
Ralf writes:
> On Mon, Jan 09, 2006 at 01:19:46PM +0530, Sathesh Babu Edara wrote:
>
> > We have ported linux-2.4.18 and linux-2-6.12 kernel (mips.org)onto MIPS
> > processor (CPU type lx4189).
> >
> > We observed that on 2.4 kernel,ll and sc instruction exception handlers
> > hitting very often.
> > Where as on linux-2.6.12 this is not happening.
>
> > Can anybody have idea why this instructions are hitting on 2.4.18 kernel and
> > not on 2-6.12 kernel.
>
> Only ll/sc instructions in application software can be emulated, so it
> would seem your application is behaving different on 2.4 and 2.6 kernels.
Is there an interface where 2.6 might be telling library code to use system calls
instead LL/SC, where the 2.4 kernel didn't?
Regards,
Kevin K.
next prev parent reply other threads:[~2006-01-09 15:13 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-08 21:00 ALCHEMY: AU1200 USB Host Controller (OHCI/EHCI) Jordan Crouse
2005-12-10 5:13 ` [linux-usb-devel] " David Brownell
2005-12-10 6:42 ` Pete Popov
2005-12-12 10:51 ` Bora Sahin
2006-01-03 14:25 ` Matej Kupljen
2006-01-03 15:54 ` Jordan Crouse
2006-01-03 21:45 ` Matej Kupljen
2006-01-04 7:18 ` Matej Kupljen
2006-01-04 12:50 ` Sathesh Babu Edara
2006-01-04 12:50 ` Sathesh Babu Edara
2006-01-04 13:06 ` Kevin D. Kissell
2006-01-09 4:54 ` LL and SC instruction simulation Sathesh Babu Edara
2006-01-09 4:54 ` Sathesh Babu Edara
2006-01-09 7:43 ` Sathesh Babu Edara
2006-01-09 7:43 ` RE: Sathesh Babu Edara
2006-01-09 7:49 ` LL and SC instruction simulation Sathesh Babu Edara
2006-01-09 7:49 ` Sathesh Babu Edara
2006-01-09 14:54 ` Ralf Baechle
2006-01-09 15:17 ` Kevin D. Kissell [this message]
2006-01-09 15:17 ` Kevin D. Kissell
2006-01-09 15:21 ` Ralf Baechle
2006-01-09 15:30 ` Ralf Baechle
2006-01-09 15:47 ` Kevin D. Kissell
2006-01-09 15:47 ` Kevin D. Kissell
2006-01-09 15:51 ` Ralf Baechle
2006-01-09 9:00 ` Kevin D. Kissell
2006-01-09 9:00 ` Re: Kevin D. Kissell
2006-01-09 21:23 ` [processor frequency] Wolfgang Denk
2006-01-09 21:53 ` Kevin D. Kissell
2006-01-09 23:01 ` Wolfgang Denk
2006-01-04 12:12 ` ALCHEMY: AU1200 USB Host Controller (OHCI/EHCI) Matej Kupljen
2006-01-04 12:32 ` Matthias Lenk
2006-01-04 13:07 ` Matej Kupljen
2006-01-04 13:54 ` bora.sahin
2006-01-04 14:17 ` Matej Kupljen
-- strict thread matches above, loose matches on Subject: below --
2006-01-09 5:19 LL and SC instruction simulation Sathesh Babu Edara
2006-01-09 5:19 ` Sathesh Babu Edara
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