On Fri, 2013-02-15 at 16:33 +, Moore, Robert wrote:
> > > > > > > > > Is there a mechanism in ACPICA to ensure that a handle
> > > > > > > > > won't become stale while a notify handler is running for
> > > > > > > > > it or is the OS responsible for ensuring that
> > > > > > > > > _EJ0 won't
> > > > > > > > Is there a mechanism in ACPICA to ensure that a handle
> > > > > > > > won't become stale while a notify handler is running for
> > > > > > > > it or is the OS responsible for ensuring that
> > > > > > > > _EJ0 won't be run in parallel with notify handlers for
> > > > > > > >
t; LKML; Bjorn Helgaas; Jiang
> > > > > Liu;
> > > > > Yinghai Lu; Yasuaki Ishimatsu; Myron Stowe; linux-...@vger.kernel.org
> > > > > Subject: Re: [Update][PATCH] ACPI / hotplug: Fix concurrency issues
> > > > > and
> > > > >
t; -Original Message-
> > > > > > From: Rafael J. Wysocki [mailto:r...@sisk.pl]
> > > > > > Sent: Thursday, February 14, 2013 4:04 AM
> > > > > > To: Moore, Robert
> > > > > > Cc: Toshi Kani; ACPI Devel Mali
, February 14, 2013 12:59 PM
To: Moore, Robert
Cc: Toshi Kani; ACPI Devel Maling List; LKML; Bjorn Helgaas; Jiang Liu;
Yinghai Lu; Yasuaki Ishimatsu; Myron Stowe; linux-...@vger.kernel.org
Subject: Re: [Update][PATCH] ACPI / hotplug: Fix concurrency issues and
memory leaks
To: Moore, Robert
Cc: Toshi Kani; ACPI Devel Maling List; LKML; Bjorn Helgaas; Jiang
Liu; Yinghai Lu; Yasuaki Ishimatsu; Myron Stowe;
linux-...@vger.kernel.org
Subject: Re: [Update][PATCH] ACPI / hotplug: Fix concurrency
issues
and memory leaks
Is there a mechanism in ACPICA to ensure that a handle
won't become stale while a notify handler is running for
it or is the OS responsible for ensuring that
_EJ0 won't be run in parallel with notify handlers for
device objects being ejected?
On Fri, 2013-02-15 at 16:33 +, Moore, Robert wrote:
Is there a mechanism in ACPICA to ensure that a handle
won't become stale while a notify handler is running for
it or is the OS responsible for ensuring that
_EJ0 won't be run in parallel with notify
PM
> > > To: Moore, Robert
> > > Cc: Toshi Kani; ACPI Devel Maling List; LKML; Bjorn Helgaas; Jiang Liu;
> > > Yinghai Lu; Yasuaki Ishimatsu; Myron Stowe; linux-...@vger.kernel.org
> > > Subject: Re: [Update][PATCH] ACPI / hotplug: Fix concurrency issues and
&g
t; LKML; Bjorn Helgaas; Jiang Liu;
> > Yinghai Lu; Yasuaki Ishimatsu; Myron Stowe; linux-...@vger.kernel.org
> > Subject: Re: [Update][PATCH] ACPI / hotplug: Fix concurrency issues and
> > memory leaks
> >
> > On Thursday, February 14, 2013 08:45:14 PM Moore, Robert wrote:
..@vger.kernel.org
> Subject: Re: [Update][PATCH] ACPI / hotplug: Fix concurrency issues and
> memory leaks
>
> On Thursday, February 14, 2013 08:45:14 PM Moore, Robert wrote:
> >
> > > -Original Message-
> > > From: Rafael J. Wysocki [mailto:r...@si
t; LKML; Bjorn Helgaas; Jiang Liu;
> > Yinghai Lu; Yasuaki Ishimatsu; Myron Stowe; linux-...@vger.kernel.org
> > Subject: Re: [Update][PATCH] ACPI / hotplug: Fix concurrency issues and
> > memory leaks
> >
> > On Thursday, February 14, 2013 02:31:22 AM Moore, Rober
rnel.org
> Subject: Re: [Update][PATCH] ACPI / hotplug: Fix concurrency issues and
> memory leaks
>
> On Thursday, February 14, 2013 02:31:22 AM Moore, Robert wrote:
> > > > > I thought about that, but actually there's no guarantee that the
> > > > &
On Thursday, February 14, 2013 12:05:43 PM Yinghai Lu wrote:
> On Wed, Feb 13, 2013 at 5:16 AM, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki
> >
> > This changeset is aimed at fixing a few different but related
> > problems in the ACPI hotplug infrastructure.
> >
> > First of all, since
On Wed, Feb 13, 2013 at 5:16 AM, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki
>
> This changeset is aimed at fixing a few different but related
> problems in the ACPI hotplug infrastructure.
>
> First of all, since notify handlers may be run in parallel with
> acpi_bus_scan(),
On Thursday, February 14, 2013 02:31:22 AM Moore, Robert wrote:
> > > > I thought about that, but actually there's no guarantee that the
> > > > handle will be valid after _EJ0 as far as I can say. So the race
> > > > condition is going to be there anyway and using struct acpi_device
> > > > just
On Thursday, February 14, 2013 02:31:22 AM Moore, Robert wrote:
I thought about that, but actually there's no guarantee that the
handle will be valid after _EJ0 as far as I can say. So the race
condition is going to be there anyway and using struct acpi_device
just makes it easier
On Wed, Feb 13, 2013 at 5:16 AM, Rafael J. Wysocki r...@sisk.pl wrote:
From: Rafael J. Wysocki rafael.j.wyso...@intel.com
This changeset is aimed at fixing a few different but related
problems in the ACPI hotplug infrastructure.
First of all, since notify handlers may be run in parallel with
On Thursday, February 14, 2013 12:05:43 PM Yinghai Lu wrote:
On Wed, Feb 13, 2013 at 5:16 AM, Rafael J. Wysocki r...@sisk.pl wrote:
From: Rafael J. Wysocki rafael.j.wyso...@intel.com
This changeset is aimed at fixing a few different but related
problems in the ACPI hotplug infrastructure.
: [Update][PATCH] ACPI / hotplug: Fix concurrency issues and
memory leaks
On Thursday, February 14, 2013 02:31:22 AM Moore, Robert wrote:
I thought about that, but actually there's no guarantee that the
handle will be valid after _EJ0 as far as I can say. So the
race condition
; Yasuaki Ishimatsu; Myron Stowe; linux-...@vger.kernel.org
Subject: Re: [Update][PATCH] ACPI / hotplug: Fix concurrency issues and
memory leaks
On Thursday, February 14, 2013 02:31:22 AM Moore, Robert wrote:
I thought about that, but actually there's no guarantee that the
handle
Kani; ACPI Devel Maling List; LKML; Bjorn Helgaas; Jiang
Liu; Yinghai Lu; Yasuaki Ishimatsu; Myron Stowe;
linux-...@vger.kernel.org
Subject: Re: [Update][PATCH] ACPI / hotplug: Fix concurrency issues
and memory leaks
On Thursday, February 14, 2013 02:31:22 AM Moore, Robert wrote
; Yasuaki Ishimatsu; Myron Stowe; linux-...@vger.kernel.org
Subject: Re: [Update][PATCH] ACPI / hotplug: Fix concurrency issues and
memory leaks
On Thursday, February 14, 2013 08:45:14 PM Moore, Robert wrote:
-Original Message-
From: Rafael J. Wysocki [mailto:r...@sisk.pl
Devel Maling List; LKML; Bjorn Helgaas; Jiang Liu;
Yinghai Lu; Yasuaki Ishimatsu; Myron Stowe; linux-...@vger.kernel.org
Subject: Re: [Update][PATCH] ACPI / hotplug: Fix concurrency issues and
memory leaks
On Thursday, February 14, 2013 08:45:14 PM Moore, Robert wrote
> > > I thought about that, but actually there's no guarantee that the
> > > handle will be valid after _EJ0 as far as I can say. So the race
> > > condition is going to be there anyway and using struct acpi_device
> > > just makes it easier to avoid it.
> >
> > In theory, yes, a stale handle
On Thu, 2013-02-14 at 00:42 +0100, Rafael J. Wysocki wrote:
> On Wednesday, February 13, 2013 04:09:29 PM Toshi Kani wrote:
> > On Wed, 2013-02-13 at 21:52 +0100, Rafael J. Wysocki wrote:
> > > On Wednesday, February 13, 2013 10:43:58 AM Toshi Kani wrote:
> > > > On Wed, 2013-02-13 at 14:16 +0100,
On Wednesday, February 13, 2013 04:09:29 PM Toshi Kani wrote:
> On Wed, 2013-02-13 at 21:52 +0100, Rafael J. Wysocki wrote:
> > On Wednesday, February 13, 2013 10:43:58 AM Toshi Kani wrote:
> > > On Wed, 2013-02-13 at 14:16 +0100, Rafael J. Wysocki wrote:
> > > > From: Rafael J. Wysocki
> > > >
On Wed, 2013-02-13 at 21:52 +0100, Rafael J. Wysocki wrote:
> On Wednesday, February 13, 2013 10:43:58 AM Toshi Kani wrote:
> > On Wed, 2013-02-13 at 14:16 +0100, Rafael J. Wysocki wrote:
> > > From: Rafael J. Wysocki
> > >
> > > This changeset is aimed at fixing a few different but related
> >
On Wednesday, February 13, 2013 10:43:58 AM Toshi Kani wrote:
> On Wed, 2013-02-13 at 14:16 +0100, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki
> >
> > This changeset is aimed at fixing a few different but related
> > problems in the ACPI hotplug infrastructure.
> >
> > First of all,
On Wed, 2013-02-13 at 14:16 +0100, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki
>
> This changeset is aimed at fixing a few different but related
> problems in the ACPI hotplug infrastructure.
>
> First of all, since notify handlers may be run in parallel with
> acpi_bus_scan(),
On Wed, 2013-02-13 at 14:16 +0100, Rafael J. Wysocki wrote:
From: Rafael J. Wysocki rafael.j.wyso...@intel.com
This changeset is aimed at fixing a few different but related
problems in the ACPI hotplug infrastructure.
First of all, since notify handlers may be run in parallel with
On Wednesday, February 13, 2013 10:43:58 AM Toshi Kani wrote:
On Wed, 2013-02-13 at 14:16 +0100, Rafael J. Wysocki wrote:
From: Rafael J. Wysocki rafael.j.wyso...@intel.com
This changeset is aimed at fixing a few different but related
problems in the ACPI hotplug infrastructure.
On Wed, 2013-02-13 at 21:52 +0100, Rafael J. Wysocki wrote:
On Wednesday, February 13, 2013 10:43:58 AM Toshi Kani wrote:
On Wed, 2013-02-13 at 14:16 +0100, Rafael J. Wysocki wrote:
From: Rafael J. Wysocki rafael.j.wyso...@intel.com
This changeset is aimed at fixing a few different
On Wednesday, February 13, 2013 04:09:29 PM Toshi Kani wrote:
On Wed, 2013-02-13 at 21:52 +0100, Rafael J. Wysocki wrote:
On Wednesday, February 13, 2013 10:43:58 AM Toshi Kani wrote:
On Wed, 2013-02-13 at 14:16 +0100, Rafael J. Wysocki wrote:
From: Rafael J. Wysocki
On Thu, 2013-02-14 at 00:42 +0100, Rafael J. Wysocki wrote:
On Wednesday, February 13, 2013 04:09:29 PM Toshi Kani wrote:
On Wed, 2013-02-13 at 21:52 +0100, Rafael J. Wysocki wrote:
On Wednesday, February 13, 2013 10:43:58 AM Toshi Kani wrote:
On Wed, 2013-02-13 at 14:16 +0100, Rafael J.
I thought about that, but actually there's no guarantee that the
handle will be valid after _EJ0 as far as I can say. So the race
condition is going to be there anyway and using struct acpi_device
just makes it easier to avoid it.
In theory, yes, a stale handle could be a problem,
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