From: Jun Sun <jsun@mvista.com>
To: Ralf Baechle <ralf@oss.sgi.com>
Cc: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>, linux-mips@oss.sgi.com
Subject: Re: CVS Update@oss.sgi.com: linux
Date: Wed, 03 Oct 2001 14:13:30 -0700 [thread overview]
Message-ID: <3BBB7F7A.7AB0411@mvista.com> (raw)
In-Reply-To: 20011003195059.A28205@dea.linux-mips.net
Ralf Baechle wrote:
>
> On Wed, Oct 03, 2001 at 01:02:56PM +0200, Maciej W. Rozycki wrote:
>
> > > Modified files:
> > > arch/mips/kernel: scall_o32.S sysmips.c
> > >
> > > Log message:
> > > Barf.
> >
> > The new mips_atomic_set() doesn't mask interrupts in the non-ll/sc case.
> > Thus it may fail to keep coherency. Is it intentional?
>
> Yes. Assuming do_page_fault did it's job successfully the address which
> has been passed as argument to sysmips() is now writable and thus we
> won't take any pagefaults.
>
> There are two remaining failure scenarios which probably are't very
> interesting for practical usage. It's when an interrupt is accessing
> the same address. This could be fixed by disabling interrupts.
> The other case is missaligned words.
>
And a third one - when you enable kernel preemption with the preemptable
kernel patch. :-)
Jun
next prev parent reply other threads:[~2001-10-03 21:22 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200109300029.f8U0TZv12410@oss.sgi.com>
[not found] ` <Pine.GSO.3.96.1011003125730.15867A-100000@delta.ds2.pg.gda.pl>
2001-10-03 17:50 ` CVS Update@oss.sgi.com: linux Ralf Baechle
2001-10-03 21:13 ` Jun Sun [this message]
2001-10-03 21:27 ` Ralf Baechle
[not found] <200208230950.g7N9o0fq016617@oss.sgi.com>
2002-08-23 10:13 ` Jan-Benedict Glaw
2002-08-23 10:41 ` Maciej W. Rozycki
[not found] <200208130138.g7D1cYk3010974@oss.sgi.com>
2002-08-19 12:35 ` Maciej W. Rozycki
2002-08-19 12:57 ` Alan Cox
2002-08-19 13:22 ` Maciej W. Rozycki
2002-08-19 13:56 ` Alan Cox
2002-08-19 13:42 ` Ralf Baechle
2002-08-20 14:10 ` Maciej W. Rozycki
[not found] <200208151925.g7FJPbfD009802@oss.sgi.com>
[not found] ` <20020815193340.GB10730@lug-owl.de>
2002-08-15 19:46 ` Ralf Baechle
2002-08-19 12:32 ` Maciej W. Rozycki
[not found] <200206301157.g5UBvrwF019470@oss.sgi.com>
2002-07-01 19:15 ` Guido Guenther
[not found] <200202022138.g12LcZU24388@oss.sgi.com>
[not found] ` <Pine.GSO.3.96.1020203191613.20409B-100000@delta.ds2.pg.gda.pl>
2002-02-03 18:37 ` Ralf Baechle
2002-02-04 11:32 ` Maciej W. Rozycki
2002-02-04 19:03 ` Jun Sun
[not found] <200112171934.fBHJYx328839@oss.sgi.com>
[not found] ` <Pine.GSO.4.21.0112181044300.15364-100000@vervain.sonytel.be>
2001-12-19 2:30 ` Ralf Baechle
[not found] <200111180324.fAI3Ob928062@oss.sgi.com>
[not found] ` <20011118092625.B23198@lug-owl.de>
[not found] ` <001801c17019$56f562a0$0deca8c0@Ulysses>
2001-11-21 23:25 ` Ralf Baechle
2001-11-21 23:36 ` Matthew Dharm
2001-11-21 23:36 ` Matthew Dharm
2001-11-22 8:56 ` Jan-Benedict Glaw
2001-11-22 10:18 ` Geert Uytterhoeven
[not found] <200111060055.fA60tX331454@oss.sgi.com>
2001-11-06 1:46 ` Florian Lohoff
[not found] <200104102242.f3AMgmc19116@oss.sgi.com>
2001-04-11 7:35 ` Ralf Baechle
2001-04-11 18:00 ` Kanoj Sarcar
2001-04-11 18:00 ` Kanoj Sarcar
2001-04-16 17:43 ` Quinn Jensen
2001-04-16 17:43 ` Quinn Jensen
2001-04-17 17:12 ` Ralf Baechle
[not found] <20001118132233Z553804-494+838@oss.sgi.com>
[not found] ` <XFMail.001118180639.Harald.Koerfgen@home.ivm.de>
2000-11-18 17:21 ` Ralf Baechle
2000-11-18 18:13 ` Justin Carlson
2000-11-18 18:36 ` Kevin D. Kissell
2000-11-18 18:36 ` Kevin D. Kissell
2000-11-19 15:16 ` Dominic Sweetman
2000-11-21 3:39 ` Ralf Baechle
[not found] <20000906233636Z42230-31375+649@oss.sgi.com>
2000-09-06 23:45 ` Ralf Baechle
2000-09-06 23:51 ` Kanoj Sarcar
2000-09-06 23:51 ` Kanoj Sarcar
2000-09-07 0:02 ` Ralf Baechle
2000-09-07 0:05 ` Kanoj Sarcar
2000-09-07 0:05 ` Kanoj Sarcar
2000-09-07 0:26 ` Ralf Baechle
[not found] <20000823172400Z42326-31375+197@oss.sgi.com>
2000-08-23 19:56 ` Ralf Baechle
2000-08-23 23:12 ` Kanoj Sarcar
2000-08-23 23:12 ` Kanoj Sarcar
[not found] <20000702193011Z42202-29274+369@oss.sgi.com>
[not found] ` <XFMail.000704192753.Harald.Koerfgen@home.ivm.de>
2000-07-04 21:22 ` Ralf Baechle
2000-07-05 18:24 ` Harald Koerfgen
[not found] <20000524012413.A5507@spock>
2000-05-24 16:50 ` Harald Koerfgen
2000-05-24 23:58 ` Ralf Baechle
2000-05-25 17:14 ` Harald Koerfgen
2000-05-25 17:19 ` Ulf Carlsson
2000-05-25 18:00 ` Ralf Baechle
2000-05-25 18:02 ` Ulf Carlsson
2000-05-25 18:17 ` Ralf Baechle
[not found] <20000519083237Z305155-391+603@oss.sgi.com>
2000-05-19 11:18 ` Ralf Baechle
[not found] <20000327210518Z305163-3992+178@oss.sgi.com>
2000-03-28 0:29 ` Ralf Baechle
[not found] <20000219003324Z305163-11638+186@oss.sgi.com>
[not found] ` <Pine.GSO.4.10.10002211054270.29481-100000@dandelion.sonytel.be>
2000-02-21 11:58 ` Ralf Baechle
[not found] ` <Pine.GSO.4.10.10002211634260.4234-100000@dandelion.sonytel.be>
2000-02-21 18:03 ` Ralf Baechle
2000-02-22 2:45 ` Geert Uytterhoeven
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