From: Grant Grundler <grundler@dsl2.external.hp.com>
To: Matthew Wilcox <willy@debian.org>
Cc: parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] O_DIRECT on devices
Date: Mon, 15 Jul 2002 01:42:19 -0600 [thread overview]
Message-ID: <20020715074219.18CD54861@dsl2.external.hp.com> (raw)
In-Reply-To: Message from Matthew Wilcox <willy@debian.org> of "Mon, 15 Jul 2002 03:46:32 BST." <20020715034632.E27706@parcelfarce.linux.theplanet.co.uk>
Matthew Wilcox wrote:
> What you're seeing sounds like bogus cache behaviour.
Randolph and I think most SMP bugs reported (and we seen ourselves)
suggest a D-cache problem.
My theory is virtual addresses are flushed on one CPU but any data
accessed through an aliases on another CPU are not flushed. And then
we end up with an inconsistency.
We've been reading Documentation/cachetlb.txt and trying
to understand what it says about virtually indexed caches.
The other thing is we don't hit the problems with PA8500 - only PA8700.
I'm guessing the aliasing or timing is quite different betweem the two.
Maybe someone else knows more?
grant
next prev parent reply other threads:[~2002-07-15 7:42 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-11 8:22 [parisc-linux] O_DIRECT on devices Patrick Caulfield
[not found] ` <3D2D4B4B.4010705@deaprofessionale.it>
2002-07-11 9:35 ` Patrick Caulfield
2002-07-15 2:46 ` Matthew Wilcox
2002-07-15 7:42 ` Grant Grundler [this message]
2002-07-15 11:29 ` Matthew Wilcox
2002-07-15 13:57 ` Patrick Caulfield
2002-07-15 14:10 ` Matthew Wilcox
2002-07-15 14:23 ` Patrick Caulfield
[not found] ` <willy@debian.org>
[not found] ` <20020916163335.J10583-+pPCBgu9SkPzIGdyhVEDUDl5KyyQGfY2kSSpQ9I8OhVaa/9Udqfwiw@public.gmane.org>
2002-09-16 16:12 ` 2.5.34? Brad Parker
[not found] ` <200209161612.g8GGCtv24883-paYRYfI9b/YMuHHiPFXXZ1fOaUvyCJUZ@public.gmane.org>
2002-09-17 15:51 ` 2.5.34? Pavel Machek
[not found] ` <20030726052012.GO1485-+pPCBgu9SkPzIGdyhVEDUDl5KyyQGfY2kSSpQ9I8OhVaa/9Udqfwiw@public.gmane.org>
2003-07-26 13:24 ` [PATCH] Toshiba ACPI Extras 0.16 Lyle Seaman
[not found] ` <20030726132501.C766314829-RAHWjsxJnJUdnm+yROfE0A@public.gmane.org>
2003-07-26 17:18 ` M. Warner Losh
[not found] ` <20030726.111800.13461649.imp-uzTCJ5RojNnQT0dZR+AlfA@public.gmane.org>
2003-07-26 22:09 ` John Belmonte
2003-07-26 21:32 ` John Belmonte
2003-07-26 21:25 ` John Belmonte
[not found] ` <3F22F1B0.9080607-ZFKsivP1bGvOQU1ULcgDhA@public.gmane.org>
2003-07-27 19:14 ` Matthew Wilcox
[not found] <pavel@suse.cz>
[not found] ` <20020917155146.F39-muQmgwBScQHrBKCeMvbIDA@public.gmane.org>
2002-09-18 12:24 ` 2.5.34? Brad Parker
[not found] ` <200209181224.g8ICONr31147-paYRYfI9b/YMuHHiPFXXZ1fOaUvyCJUZ@public.gmane.org>
2002-09-18 12:53 ` 2.5.34? Pavel Machek
[not found] ` <20040624195304.GE698-u08AdweFZfgxtPtxi4kahqVXKuFTiq87@public.gmane.org>
2004-06-29 11:50 ` swsusp and ac status Daniele Boffi
[not found] ` <200406291150.i5TBopX9001428-xzhXYMPkGmXoPXhRcRtihA@public.gmane.org>
2004-06-29 11:54 ` Pavel Machek
-- strict thread matches above, loose matches on Subject: below --
2004-06-23 6:26 Daniele Boffi
[not found] ` <20040623082653.A26014-xzhXYMPkGmXoPXhRcRtihA@public.gmane.org>
2004-06-23 13:34 ` Stefan Seyfried
2004-06-24 19:53 ` Pavel Machek
2003-07-25 23:28 [PATCH] Toshiba ACPI Extras 0.16 John Belmonte
[not found] ` <3F21BD11.8060405-ZFKsivP1bGvOQU1ULcgDhA@public.gmane.org>
2003-07-26 5:20 ` Matthew Wilcox
2003-07-18 5:27 [parisc-linux] cvs [login aborted]? Joel Soete
2003-07-18 11:21 ` Matthew Wilcox
2003-07-18 14:44 ` bame
2002-09-16 0:14 2.5.34? Gustavo Sverzut Barbieri
[not found] ` <20020916001425.82756.qmail-jIUPyM9ARX+A/QwVtaZbd3CJp6faPEW9@public.gmane.org>
2002-09-16 0:25 ` 2.5.34? Matthew Wilcox
[not found] ` <20020916012506.G10583-+pPCBgu9SkPzIGdyhVEDUDl5KyyQGfY2kSSpQ9I8OhVaa/9Udqfwiw@public.gmane.org>
2002-09-16 6:19 ` 2.5.34? Toon van der Pas
[not found] ` <20020916081909.A25876-FeupCOz82S5hxPbjSeLqYA@public.gmane.org>
2002-09-17 15:46 ` 2.5.34? Pavel Machek
[not found] ` <20020917154653.C39-muQmgwBScQHrBKCeMvbIDA@public.gmane.org>
2002-09-18 16:38 ` 2.5.34? Toon van der Pas
[not found] ` <20020918183819.A10275-FeupCOz82S5hxPbjSeLqYA@public.gmane.org>
2002-09-17 23:36 ` 2.5.34? Pavel Machek
2002-09-16 11:30 ` 2.5.34? Brad Parker
[not found] ` <200209161130.g8GBUo024143-paYRYfI9b/YMuHHiPFXXZ1fOaUvyCJUZ@public.gmane.org>
2002-09-16 15:33 ` 2.5.34? Matthew Wilcox
2002-09-17 15:49 ` 2.5.34? Pavel Machek
2002-09-03 23:47 Runlevel for Sleep? Grover, Andrew
2002-08-13 13:23 [parisc-linux] HP9000/L2000 + FC60 Fiber Support António Ribeiro
2002-08-13 13:29 ` Matthew Wilcox
2002-08-15 6:01 ` Grant Grundler
[not found] <andrew.grover@intel.com>
2002-06-24 17:35 ` driverfs is not for everything! (was: [PATCH] /proc/scsi/map ) Grover, Andrew
2002-06-24 17:48 ` driverfs is not for everything! (was: [PATCH] /proc/scsi/map kernel
2002-06-24 18:04 ` driverfs is not for everything! (was: [PATCH] /proc/scsi/map ) David Brownell
2002-06-24 18:04 ` David Brownell
2002-06-24 18:09 ` James Bottomley
2002-06-24 19:23 ` Oliver Xymoron
2002-06-24 19:23 ` Oliver Xymoron
2002-06-25 18:38 ` Patrick Mochel
2002-06-25 18:38 ` Patrick Mochel
2002-06-24 18:32 ` Roman Zippel
2002-06-24 18:32 ` Roman Zippel
2002-06-24 22:47 ` John Summerfield
2002-06-25 18:35 ` Patrick Mochel
2002-06-25 18:35 ` Patrick Mochel
2002-07-01 2:41 ` Pavel Machek
[not found] ` <andrew.grover-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
[not found] ` <EDC461A30AC4D511ADE10002A5072CAD0236DE0D-OU+JdkIUtvd9zuciVAfUoVDQ4js95KgL@public.gmane.org>
2002-09-04 0:57 ` Runlevel for Sleep? Lyle Seaman
2002-09-04 10:50 ` P. Christeas
[not found] ` <200209041055.g84AsFW05361-a1J+ToZc0kR3t0M9ZKkFCQ@public.gmane.org>
2002-09-04 14:14 ` Charl P. Botha
2002-09-04 14:35 ` Robert Wo"rle
2002-09-06 12:21 ` Pavel Machek
[not found] ` <20020906122153.F39-muQmgwBScQHrBKCeMvbIDA@public.gmane.org>
2002-09-06 21:40 ` Patrick Mochel
[not found] ` <Pine.LNX.4.44.0209061411390.1021-100000-yZQdDDOm3n9ZQn2sFP3R7eTW4wlIGRCZ@public.gmane.org>
2002-09-06 22:29 ` Pavel Machek
[not found] ` <20020906222930.GE8827-jyMamyUUXNJG4ohzP4jBZS1Fcj925eT/@public.gmane.org>
2002-09-06 23:18 ` P. Christeas
2002-09-07 5:02 ` Stephen L Johnson
[not found] ` <1031374944.1530.44.camel-EWEM0Crkbjs/2vX+WiJxEB2eb7JE58TQ@public.gmane.org>
2002-09-07 19:51 ` Patrick Mochel
[not found] ` <Pine.LNX.4.44.0209071232170.1021-100000-yZQdDDOm3n9ZQn2sFP3R7eTW4wlIGRCZ@public.gmane.org>
2002-09-08 11:23 ` P. Christeas
2002-09-09 8:46 ` Diego Zuccato
[not found] ` <3D7C5FDF.4FB4E759-gmoNqwowlqBr8A+qpt3pXFzrSV/HdtiB@public.gmane.org>
2002-09-09 8:50 ` P. Christeas
2002-09-09 23:52 ` Diego Zuccato
2002-09-13 17:13 ` Pavel Machek
2002-09-14 7:56 ` Andreas Lohrum
[not found] ` <20020913171338.GC7096-I/5MKhXcvmPrBKCeMvbIDA@public.gmane.org>
2002-09-14 10:23 ` P. Christeas
[not found] ` <200209141237.g8ECb2d03519-a1J+ToZc0kR3t0M9ZKkFCQ@public.gmane.org>
2002-09-14 15:09 ` Pavel Machek
[not found] ` <200209081126.g88BQjn05186-a1J+ToZc0kR3t0M9ZKkFCQ@public.gmane.org>
2002-09-13 17:08 ` Pavel Machek
2002-09-07 17:32 ` Lyle Seaman
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