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From: "Pekka Enberg" <penberg@cs.helsinki.fi>
To: "Pekka Paalanen" <pq@iki.fi>
Cc: "Arjan van de Ven" <arjan@infradead.org>,
	"Ingo Molnar" <mingo@elte.hu>,
	"Christoph Hellwig" <hch@infradead.org>,
	linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH] x86: explicit call to mmiotrace in do_page_fault()
Date: Sat, 9 Feb 2008 20:56:07 +0200	[thread overview]
Message-ID: <84144f020802091056hffc22eckbda461534e3a6072@mail.gmail.com> (raw)
In-Reply-To: <20080209202353.0e83e337@daedalus.pq.iki.fi>

Hi Pekka,

On Feb 9, 2008 8:23 PM, Pekka Paalanen <pq@iki.fi> wrote:
> By default it reserves 32 MB/cpu of relay buffers during module init.
> It's this big based on experimentation with the nvidia proprietary driver.
> There is no other way than unloading the module to free the buffers, or
> even to clear them. This means that every time you start the user space
> logger application, it gets old data first. Also poking the module
> parameters via /sys is not allowed.

So how is mmiotrace different from, say, blktrace that has an ioctl()
to setup/teardown the relay channels (for mmiotrace it can be a
"status" file that does the setup/teardown when written some
appropriate values)?

                             Pekka

  reply	other threads:[~2008-02-09 18:56 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-27 16:52 [PATCH] x86: Add a list for custom page fault handlers Pekka Paalanen
2008-01-27 17:55 ` [RFC PATCH] x86: mmiotrace - trace memory mapped IO Pekka Paalanen
2008-01-30 22:39   ` Pekka Paalanen
2008-01-27 19:29 ` [PATCH] x86: Add a list for custom page fault handlers Ingo Molnar
2008-01-27 21:03 ` Peter Zijlstra
2008-01-30  2:28 ` Harvey Harrison
2008-01-30  2:34   ` Harvey Harrison
2008-01-30 18:08     ` Pekka Paalanen
2008-01-31 15:07       ` Ingo Molnar
2008-01-31 16:02         ` [PATCH v2] " Pekka Paalanen
2008-01-31 16:15           ` Arjan van de Ven
2008-02-03  6:55             ` Pekka Paalanen
2008-02-03  7:03               ` Ingo Molnar
2008-02-03 21:40                 ` Pekka Paalanen
2008-02-05 20:28                 ` [PATCH 1/4] x86 mmiotrace: use lookup_address() Pekka Paalanen
2008-02-05 20:30                   ` [PATCH 2/4] x86 mmiotrace: fix relay-buffer-full flag for SMP Pekka Paalanen
2008-02-05 20:44                     ` Eric Dumazet
2008-02-05 21:14                       ` Pekka Paalanen
2008-02-05 21:35                         ` Eric Dumazet
2008-02-09 17:53                           ` [PATCH] x86 mmiotrace: Use percpu instead of arrays Pekka Paalanen
2008-02-05 20:31                   ` [PATCH 3/4] x86 mmiotrace: comment about user space ABI Pekka Paalanen
2008-02-05 20:39                   ` [PATCH 4/4] x86 mmiotrace: move files into arch/x86/mm/ Pekka Paalanen
2008-02-06  3:02                     ` Randy Dunlap
2008-02-09 11:21                       ` Pekka Paalanen
2008-02-07 12:53                     ` Ingo Molnar
2008-02-07 12:56                       ` Christoph Hellwig
2008-02-09 17:52                         ` [RFC PATCH] x86: explicit call to mmiotrace in do_page_fault() Pekka Paalanen
2008-02-09 18:01                           ` Arjan van de Ven
2008-02-09 18:23                             ` Pekka Paalanen
2008-02-09 18:56                               ` Pekka Enberg [this message]
2008-02-09 19:11                                 ` Pekka Paalanen
2008-02-09 19:19                                   ` Pekka Enberg
2008-02-09 18:39                             ` Peter Zijlstra
2008-02-09 18:39                           ` Peter Zijlstra
2008-02-10 18:05                             ` [RFC PATCH v2] " Pekka Paalanen
2008-02-11  2:12                               ` Pavel Roskin
2008-02-11 18:04                                 ` Pekka Paalanen
2008-02-06  5:00                   ` [PATCH 1/4] x86 mmiotrace: use lookup_address() Christoph Hellwig
2008-02-07 12:52                     ` Ingo Molnar
2008-01-31 16:16           ` [RFC PATCH v2] x86: mmiotrace - trace memory mapped IO Pekka Paalanen
2008-01-31 16:29             ` Arjan van de Ven
2008-02-03  7:21               ` Pekka Paalanen
2008-01-30 18:20 ` [PATCH] x86: Add a list for custom page fault handlers Arjan van de Ven

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