From: Mark Rutland <mark.rutland@arm.com>
To: Alexander Holler <holler@ahsoftware.de>
Cc: Thierry Reding <thierry.reding@gmail.com>,
"grant.likely@linaro.org" <grant.likely@linaro.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
Jon Loeliger <jdl@jdl.com>, Russell King <linux@arm.linux.org.uk>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Rob Herring <robh+dt@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [RFC PATCH 0/9] dt: dependencies (for deterministic driver initialization order based on the DT)
Date: Fri, 22 Aug 2014 14:19:19 +0100 [thread overview]
Message-ID: <20140822131919.GX21734@leverpostej> (raw)
In-Reply-To: <53F64624.5000403@ahsoftware.de>
On Thu, Aug 21, 2014 at 08:19:00PM +0100, Alexander Holler wrote:
> Am 21.08.2014 16:02, schrieb Thierry Reding:
>
> > Anyway, those are all fairly standard reasons for where deferred probe
> > triggers, and since I do like deferred probe for it's simplicity and
> > reliability I'd rather not try to work around it if boot time is all
> > that people are concerned about.
>
> It's neither simple nor reliable. It's non deterministic brutforcing
> while making it almost impossible to identify real errors.
It's horrible, yes.
> In my humble opinion the worst way to solve something. I'm pretty sure
> if I would have suggest such a solution, the maintainer crowd would have
> eaten me without cooking.
We didn't have a better workable solution at the time. Having a hack
that got boards booting was considered better than not having them boot.
I don't remember people being particularly enthralled by the idea.
Thanks,
Mark.
WARNING: multiple messages have this Message-ID (diff)
From: Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>
To: Alexander Holler <holler-SXC+2es9fhnfWeYVQQPykw@public.gmane.org>
Cc: Thierry Reding
<thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
"grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org"
<grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Jon Loeliger <jdl-CYoMK+44s/E@public.gmane.org>,
Russell King <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>,
Greg Kroah-Hartman
<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>
Subject: Re: [RFC PATCH 0/9] dt: dependencies (for deterministic driver initialization order based on the DT)
Date: Fri, 22 Aug 2014 14:19:19 +0100 [thread overview]
Message-ID: <20140822131919.GX21734@leverpostej> (raw)
In-Reply-To: <53F64624.5000403-SXC+2es9fhnfWeYVQQPykw@public.gmane.org>
On Thu, Aug 21, 2014 at 08:19:00PM +0100, Alexander Holler wrote:
> Am 21.08.2014 16:02, schrieb Thierry Reding:
>
> > Anyway, those are all fairly standard reasons for where deferred probe
> > triggers, and since I do like deferred probe for it's simplicity and
> > reliability I'd rather not try to work around it if boot time is all
> > that people are concerned about.
>
> It's neither simple nor reliable. It's non deterministic brutforcing
> while making it almost impossible to identify real errors.
It's horrible, yes.
> In my humble opinion the worst way to solve something. I'm pretty sure
> if I would have suggest such a solution, the maintainer crowd would have
> eaten me without cooking.
We didn't have a better workable solution at the time. Having a hack
that got boards booting was considered better than not having them boot.
I don't remember people being particularly enthralled by the idea.
Thanks,
Mark.
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WARNING: multiple messages have this Message-ID (diff)
From: mark.rutland@arm.com (Mark Rutland)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH 0/9] dt: dependencies (for deterministic driver initialization order based on the DT)
Date: Fri, 22 Aug 2014 14:19:19 +0100 [thread overview]
Message-ID: <20140822131919.GX21734@leverpostej> (raw)
In-Reply-To: <53F64624.5000403@ahsoftware.de>
On Thu, Aug 21, 2014 at 08:19:00PM +0100, Alexander Holler wrote:
> Am 21.08.2014 16:02, schrieb Thierry Reding:
>
> > Anyway, those are all fairly standard reasons for where deferred probe
> > triggers, and since I do like deferred probe for it's simplicity and
> > reliability I'd rather not try to work around it if boot time is all
> > that people are concerned about.
>
> It's neither simple nor reliable. It's non deterministic brutforcing
> while making it almost impossible to identify real errors.
It's horrible, yes.
> In my humble opinion the worst way to solve something. I'm pretty sure
> if I would have suggest such a solution, the maintainer crowd would have
> eaten me without cooking.
We didn't have a better workable solution at the time. Having a hack
that got boards booting was considered better than not having them boot.
I don't remember people being particularly enthralled by the idea.
Thanks,
Mark.
next prev parent reply other threads:[~2014-08-22 13:21 UTC|newest]
Thread overview: 258+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-12 16:47 [RFC PATCH 0/9] dt: dependencies (for deterministic driver initialization order based on the DT) Alexander Holler
2014-05-12 16:47 ` Alexander Holler
2014-05-12 16:47 ` [RFC PATCH 1/9] dt: deps: dtc: Automatically add new property 'dependencies' which contains a list of referenced phandles Alexander Holler
2014-05-12 16:47 ` Alexander Holler
2014-05-12 16:47 ` Alexander Holler
2014-05-17 12:16 ` Tomasz Figa
2014-05-17 12:16 ` Tomasz Figa
2014-05-17 12:16 ` Tomasz Figa
2014-05-19 12:35 ` Alexander Holler
2014-05-19 12:35 ` Alexander Holler
2014-05-19 15:38 ` Jon Loeliger
2014-05-19 15:49 ` Jon Loeliger
2014-05-19 17:26 ` Alexander Holler
2014-05-19 17:26 ` Alexander Holler
2014-05-19 17:26 ` Alexander Holler
2014-05-27 20:02 ` Grant Likely
2014-05-27 20:02 ` Grant Likely
2014-05-27 20:02 ` Grant Likely
2014-05-27 20:31 ` Alexander Holler
2014-05-27 20:31 ` Alexander Holler
2014-05-12 16:47 ` [RFC PATCH 2/9] dt: deps: dependency based device creation Alexander Holler
2014-05-12 16:47 ` Alexander Holler
2014-05-14 14:05 ` Grant Likely
2014-05-14 14:05 ` Grant Likely
2014-05-14 14:05 ` Grant Likely
2014-05-14 14:49 ` Alexander Holler
2014-05-14 14:49 ` Alexander Holler
2014-05-14 14:49 ` Alexander Holler
2014-05-14 17:20 ` Alexander Holler
2014-05-14 17:20 ` Alexander Holler
2014-05-14 20:06 ` Grant Likely
2014-05-14 20:06 ` Grant Likely
2014-05-14 20:06 ` Grant Likely
2014-05-14 21:10 ` Alexander Holler
2014-05-14 21:10 ` Alexander Holler
2014-05-16 11:00 ` Grant Likely
2014-05-16 11:00 ` Grant Likely
2014-05-16 11:00 ` Grant Likely
2014-05-18 9:53 ` Alexander Holler
2014-05-18 9:53 ` Alexander Holler
2014-05-16 17:31 ` Alexander Shiyan
2014-05-16 17:31 ` Alexander Shiyan
2014-05-16 17:31 ` Alexander Shiyan
[not found] ` <5373DBCF.1080503-SXC+2es9fhnfWeYVQQPykw@public.gmane.org>
2014-05-16 17:31 ` Alexander Shiyan
2014-05-16 17:31 ` Alexander Shiyan
2014-05-14 15:51 ` Alexander Holler
2014-05-14 15:51 ` Alexander Holler
2014-05-17 14:24 ` Tomasz Figa
2014-05-17 14:24 ` Tomasz Figa
2014-05-18 14:59 ` Grant Likely
2014-05-18 14:59 ` Grant Likely
2014-05-19 8:41 ` Alexander Holler
2014-05-19 8:41 ` Alexander Holler
2014-05-12 16:47 ` [RFC PATCH 3/9] dt: deps: dtc: Add option to print initialization order Alexander Holler
2014-05-12 16:47 ` Alexander Holler
2014-05-12 16:47 ` Alexander Holler
2014-05-12 20:38 ` Jon Loeliger
2014-05-12 22:58 ` Alexander Holler
2014-05-12 22:58 ` Alexander Holler
2014-05-12 22:58 ` Alexander Holler
[not found] ` <537151FF.8070104-SXC+2es9fhnfWeYVQQPykw@public.gmane.org>
2014-05-13 8:54 ` [PATCH 0/3] add dependencies Alexander Holler
[not found] ` <1399971243-18153-1-git-send-email-holler-SXC+2es9fhnfWeYVQQPykw@public.gmane.org>
2014-05-13 8:54 ` [PATCH 1/3] deps: Automatically add new property 'dependencies' which contains a list of referenced phandles Alexander Holler
2014-05-13 8:54 ` [PATCH 2/3] deps: Add option to print initialization order Alexander Holler
2014-05-13 8:54 ` [PATCH 3/3] deps: Add option to print dependency graph as dot (Graphviz) Alexander Holler
2014-05-13 18:48 ` [PATCH] deps: introduce new (virtual) property no-dependencies Alexander Holler
[not found] ` <1400006923-7950-1-git-send-email-holler-SXC+2es9fhnfWeYVQQPykw@public.gmane.org>
2014-05-14 1:55 ` Alexander Holler
[not found] ` <5372CD15.5020001-SXC+2es9fhnfWeYVQQPykw@public.gmane.org>
2014-05-14 7:02 ` Alexander Holler
2014-05-12 16:47 ` [RFC PATCH 4/9] dt: deps: dtc: Add option to print dependency graph as dot (Graphviz) Alexander Holler
2014-05-12 16:47 ` Alexander Holler
2014-05-12 16:47 ` [RFC PATCH 5/9] dt: deps: register drivers based on the initialization order based on DT Alexander Holler
2014-05-12 16:47 ` Alexander Holler
2014-05-12 16:47 ` Alexander Holler
2014-05-14 14:13 ` Grant Likely
2014-05-14 14:13 ` Grant Likely
2014-05-14 14:13 ` Grant Likely
2014-05-14 14:58 ` Alexander Holler
2014-05-14 14:58 ` Alexander Holler
2014-05-14 14:58 ` Alexander Holler
2014-05-14 19:32 ` Grant Likely
2014-05-14 19:32 ` Grant Likely
2014-05-14 19:32 ` Grant Likely
2014-05-12 16:47 ` [RFC PATCH 6/9] dt: deps: WIP: well done drivers Alexander Holler
2014-05-12 16:47 ` Alexander Holler
2014-05-12 16:47 ` Alexander Holler
2014-05-12 16:47 ` [RFC PATCH 7/9] dt: deps: kirkwood: make it possible to use CONFIG_OF_DEPENDENCIES Alexander Holler
2014-05-12 16:47 ` Alexander Holler
2014-05-12 16:47 ` [RFC PATCH 8/9] dt: deps: dts: kirkwood: dockstar: add dependency ehci -> usb power regulator Alexander Holler
2014-05-12 16:47 ` Alexander Holler
2014-05-12 16:48 ` [RFC PATCH 9/9] dt: deps: omap2: make it possible to use CONFIG_OF_DEPENDENCIES Alexander Holler
2014-05-12 16:48 ` Alexander Holler
2014-05-13 15:40 ` [PATCH 10/9] dt: deps: fix bug not registering late drivers when OF_DEPENDENCIES is disabled Alexander Holler
2014-05-13 15:40 ` Alexander Holler
2014-05-13 15:40 ` Alexander Holler
2014-05-13 19:27 ` [RFC PATCH 11/9] dt: deps: dtc: introduce new (virtual) property no-dependencies Alexander Holler
2014-05-13 19:27 ` Alexander Holler
2014-05-13 19:27 ` Alexander Holler
2014-05-14 8:20 ` dt: deps: some tips about how to debug/evaluate this feature Alexander Holler
2014-05-14 14:19 ` [RFC PATCH 0/9] dt: dependencies (for deterministic driver initialization order based on the DT) Grant Likely
2014-05-14 14:19 ` Grant Likely
2014-05-14 14:19 ` Grant Likely
2014-05-14 15:02 ` Alexander Holler
2014-05-14 15:02 ` Alexander Holler
2014-05-14 16:05 ` Grant Likely
2014-05-14 16:05 ` Grant Likely
2014-05-14 16:05 ` Grant Likely
2014-05-14 16:23 ` Alexander Holler
2014-05-14 16:23 ` Alexander Holler
2014-05-14 16:23 ` Alexander Holler
2014-05-14 17:30 ` Rob Herring
2014-05-14 17:30 ` Rob Herring
2014-05-14 17:30 ` Rob Herring
2014-05-14 17:45 ` Alexander Holler
2014-05-14 17:45 ` Alexander Holler
2014-05-14 17:45 ` Alexander Holler
2014-05-14 17:53 ` Alexander Holler
2014-05-14 17:53 ` Alexander Holler
2014-05-14 17:53 ` Alexander Holler
2014-05-14 18:16 ` Alexander Holler
2014-05-14 18:16 ` Alexander Holler
2014-05-14 18:16 ` Alexander Holler
2014-05-14 19:13 ` Alexander Holler
2014-05-14 19:13 ` Alexander Holler
2014-05-14 19:13 ` Alexander Holler
2014-05-14 19:06 ` Rob Herring
2014-05-14 19:06 ` Rob Herring
2014-05-14 19:06 ` Rob Herring
2014-05-14 19:24 ` Alexander Holler
2014-05-14 19:24 ` Alexander Holler
2014-05-14 19:24 ` Alexander Holler
2014-05-15 1:46 ` Alexander Holler
2014-05-15 1:46 ` Alexander Holler
2014-05-15 1:46 ` Alexander Holler
2014-05-14 23:00 ` Alexander Holler
2014-05-14 23:00 ` Alexander Holler
2014-05-14 23:00 ` Alexander Holler
2014-08-21 14:02 ` Thierry Reding
2014-08-21 14:02 ` Thierry Reding
2014-08-21 14:02 ` Thierry Reding
2014-08-21 19:19 ` Alexander Holler
2014-08-21 19:19 ` Alexander Holler
2014-08-21 19:19 ` Alexander Holler
2014-08-22 13:19 ` Mark Rutland [this message]
2014-08-22 13:19 ` Mark Rutland
2014-08-22 13:19 ` Mark Rutland
2014-08-22 15:45 ` Alexander Holler
2014-08-22 15:45 ` Alexander Holler
2014-08-22 15:45 ` Alexander Holler
2014-08-25 9:39 ` Thierry Reding
2014-08-25 9:39 ` Thierry Reding
2014-08-25 9:39 ` Thierry Reding
2014-08-25 13:08 ` Jon Loeliger
2014-08-25 13:08 ` Jon Loeliger
2014-08-25 13:08 ` Jon Loeliger
2014-08-25 13:37 ` Thierry Reding
2014-08-25 13:37 ` Thierry Reding
2014-08-25 13:37 ` Thierry Reding
2014-08-25 14:13 ` Jon Loeliger
2014-08-25 14:13 ` Jon Loeliger
2014-08-25 14:13 ` Jon Loeliger
2014-08-25 14:41 ` Thierry Reding
2014-08-25 14:41 ` Thierry Reding
2014-08-25 14:41 ` Thierry Reding
2014-08-26 8:42 ` Grant Likely
2014-08-26 8:42 ` Grant Likely
2014-08-26 8:42 ` Grant Likely
2014-08-26 8:49 ` Thierry Reding
2014-08-26 8:49 ` Thierry Reding
2014-08-26 8:49 ` Thierry Reding
2014-08-26 9:42 ` Alexander Holler
2014-08-26 9:42 ` Alexander Holler
2014-08-26 9:42 ` Alexander Holler
2014-08-26 10:11 ` Mark Rutland
2014-08-26 10:11 ` Mark Rutland
2014-08-26 10:11 ` Mark Rutland
2014-08-26 10:24 ` Thierry Reding
2014-08-26 10:24 ` Thierry Reding
2014-08-26 10:24 ` Thierry Reding
2014-08-27 10:34 ` Grant Likely
2014-08-27 10:34 ` Grant Likely
2014-08-27 10:34 ` Grant Likely
2014-08-27 14:44 ` Catalin Marinas
2014-08-27 14:44 ` Catalin Marinas
2014-08-27 14:44 ` Catalin Marinas
2014-08-27 16:22 ` Stephen Warren
2014-08-27 16:22 ` Stephen Warren
2014-08-27 16:22 ` Stephen Warren
2014-08-27 16:30 ` Alexander Holler
2014-08-27 16:30 ` Alexander Holler
2014-08-27 16:30 ` Alexander Holler
2014-08-27 16:37 ` Stephen Warren
2014-08-27 16:37 ` Stephen Warren
2014-08-27 16:37 ` Stephen Warren
2014-08-27 16:58 ` Alexander Holler
2014-08-27 16:58 ` Alexander Holler
2014-08-27 16:58 ` Alexander Holler
2014-08-27 17:52 ` Catalin Marinas
2014-08-27 17:52 ` Catalin Marinas
2014-08-27 17:52 ` Catalin Marinas
2014-08-27 18:14 ` Alexander Holler
2014-08-27 18:14 ` Alexander Holler
2014-08-27 18:14 ` Alexander Holler
2014-08-28 6:50 ` Alexander Holler
2014-08-28 6:50 ` Alexander Holler
2014-08-28 6:50 ` Alexander Holler
2014-08-28 9:23 ` Catalin Marinas
2014-08-28 9:23 ` Catalin Marinas
2014-08-28 9:23 ` Catalin Marinas
2014-08-29 1:43 ` Alexander Holler
2014-08-29 1:43 ` Alexander Holler
2014-08-29 1:43 ` Alexander Holler
2014-08-26 10:25 ` Thierry Reding
2014-08-26 10:25 ` Thierry Reding
2014-08-26 10:25 ` Thierry Reding
2014-08-26 10:44 ` Alexander Holler
2014-08-26 10:44 ` Alexander Holler
2014-08-26 10:44 ` Alexander Holler
2014-08-26 11:01 ` Alexander Holler
2014-08-26 11:01 ` Alexander Holler
2014-08-26 11:01 ` Alexander Holler
2014-08-26 11:08 ` Thierry Reding
2014-08-26 11:08 ` Thierry Reding
2014-08-26 11:08 ` Thierry Reding
2014-08-26 11:23 ` Alexander Holler
2014-08-26 11:23 ` Alexander Holler
2014-08-26 11:23 ` Alexander Holler
2014-08-26 11:47 ` Thierry Reding
2014-08-26 11:47 ` Thierry Reding
2014-08-26 11:47 ` Thierry Reding
2014-08-26 12:00 ` Alexander Holler
2014-08-26 12:00 ` Alexander Holler
2014-08-26 12:00 ` Alexander Holler
2014-08-26 13:58 ` Jon Loeliger
2014-08-26 13:58 ` Jon Loeliger
2014-08-26 13:58 ` Jon Loeliger
2014-08-26 14:17 ` Thierry Reding
2014-08-26 14:17 ` Thierry Reding
2014-08-26 14:17 ` Thierry Reding
2014-08-27 7:16 ` Alexander Holler
2014-08-27 7:16 ` Alexander Holler
2014-08-27 7:16 ` Alexander Holler
2014-08-27 9:26 ` Alexander Holler
2014-08-27 9:26 ` Alexander Holler
2014-08-27 9:26 ` Alexander Holler
2014-08-26 7:56 ` Alexander Holler
2014-08-26 7:56 ` Alexander Holler
2014-08-26 7:56 ` Alexander Holler
2014-08-26 8:51 ` Grant Likely
2014-08-26 8:51 ` Grant Likely
2014-08-26 8:51 ` Grant Likely
2014-08-26 9:56 ` Alexander Holler
2014-08-26 9:56 ` Alexander Holler
2014-08-26 9:56 ` Alexander Holler
2014-08-26 10:18 ` Alexander Holler
2014-08-26 10:18 ` Alexander Holler
2014-08-26 10:18 ` Alexander Holler
2014-08-26 9:54 ` Mark Rutland
2014-08-26 9:54 ` Mark Rutland
2014-08-26 9:54 ` Mark Rutland
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