From: Borislav Petkov <borislav.petkov@amd.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: akpm@linux-foundation.org, greg@kroah.com, mingo@elte.hu,
norsk5@yahoo.com, tglx@linutronix.de, mchehab@redhat.com,
aris@redhat.com, edt@aei.ca, linux-kernel@vger.kernel.org,
Andreas Herrmann <andreas.herrmann3@amd.com>
Subject: Re: [PATCH 01/22] x86: add methods for writing of an MSR on several CPUs
Date: Fri, 22 May 2009 16:39:18 +0200 [thread overview]
Message-ID: <20090522143918.GA22850@aftab> (raw)
In-Reply-To: <4A159179.6070607@zytor.com>
On Thu, May 21, 2009 at 10:38:01AM -0700, H. Peter Anvin wrote:
> Borislav Petkov wrote:
> >
> > Well, let's do the nonserializing thing and have it done right from the
> > beginning. We might not care now but who knows..?
> >
>
> If nothing else it might matter for boot time. Serializing *anything*
> across a large number of CPUs can be very expensive.
well, upon a closer look, smp_call_function_many() skips over the CPU
it is executing on and there's currently work in that area to extend
that API: http://marc.info/?l=linux-kernel&m=123979231511594&w=2.
However, according to Linus' comments, it looks like this would need a
bit of work so I guess we should wait with the concurrency stuff a bit,
no?
--
Regards/Gruss,
Boris.
Operating | Advanced Micro Devices GmbH
System | Karl-Hammerschmidt-Str. 34, 85609 Dornach b. München, Germany
Research | Geschäftsführer: Thomas M. McCoy, Giuliano Meroni
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next prev parent reply other threads:[~2009-05-22 14:40 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-15 12:22 [RFC PATCH 00/21 v4] amd64_edac: EDAC module for AMD64 Borislav Petkov
2009-05-15 12:22 ` [PATCH 01/22] x86: add methods for writing of an MSR on several CPUs Borislav Petkov
2009-05-19 17:24 ` Borislav Petkov
2009-05-20 5:18 ` H. Peter Anvin
2009-05-20 14:49 ` Borislav Petkov
2009-05-20 21:39 ` H. Peter Anvin
2009-05-21 14:08 ` Borislav Petkov
2009-05-21 14:21 ` H. Peter Anvin
2009-05-21 16:26 ` Borislav Petkov
2009-05-21 17:38 ` H. Peter Anvin
2009-05-22 14:39 ` Borislav Petkov [this message]
2009-05-22 16:47 ` H. Peter Anvin
2009-05-25 11:01 ` Borislav Petkov
2009-05-25 11:02 ` Borislav Petkov
2009-05-25 11:03 ` Borislav Petkov
2009-05-15 12:22 ` [PATCH 02/22] edac: fold __func__ into edac_debug_printk Borislav Petkov
2009-05-15 13:25 ` Mauro Carvalho Chehab
2009-05-15 12:22 ` [PATCH 03/22] amd64_edac: add driver header Borislav Petkov
2009-05-15 12:22 ` [PATCH 04/22] amd64_edac: add debugging/testing code Borislav Petkov
2009-05-15 12:22 ` [PATCH 05/22] amd64_edac: add DRAM error injection logic using sysfs Borislav Petkov
2009-05-15 12:22 ` [PATCH 06/22] amd64_edac: add MCA error types Borislav Petkov
2009-05-15 12:22 ` [PATCH 07/22] amd64_edac: add memory scrubber interface Borislav Petkov
2009-05-15 12:22 ` [PATCH 08/22] amd64_edac: add sys addr to memory controller mapping helpers Borislav Petkov
2009-05-15 12:22 ` [PATCH 09/22] amd64_edac: add functionality to compute the DRAM hole Borislav Petkov
2009-05-15 12:22 ` [PATCH 10/22] amd64_edac: add DRAM address type conversion facilities Borislav Petkov
2009-05-15 12:22 ` [PATCH 11/22] amd64_edac: add helper to dump relevant registers Borislav Petkov
2009-05-15 12:22 ` [PATCH 12/22] amd64_edac: assign DRAM chip select base and mask in a family-specific way Borislav Petkov
2009-05-15 12:22 ` [PATCH 13/22] amd64_edac: add k8-specific methods Borislav Petkov
2009-05-15 12:22 ` [PATCH 14/22] amd64_edac: add F10h-and-later methods-p1 Borislav Petkov
2009-05-15 12:22 ` [PATCH 15/22] amd64_edac: add F10h-and-later methods-p2 Borislav Petkov
2009-05-15 12:22 ` [PATCH 16/22] amd64_edac: add F10h-and-later methods-p3 Borislav Petkov
2009-05-15 12:22 ` [PATCH 17/22] amd64_edac: add per-family descriptors Borislav Petkov
2009-05-15 12:22 ` [PATCH 18/22] amd64_edac: add ECC chipkill syndrome mapping table Borislav Petkov
2009-05-15 12:22 ` [PATCH 19/22] amd64_edac: add error decoding logic Borislav Petkov
2009-05-15 12:22 ` [PATCH 20/22] amd64_edac: add EDAC core-related initializers Borislav Petkov
2009-05-15 12:22 ` [PATCH 21/22] amd64_edac: add ECC reporting initializers Borislav Petkov
2009-05-15 12:22 ` [PATCH 22/22] amd64_edac: add module registration routines Borislav Petkov
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