From: "Huang, Ying" <ying.huang@intel.com>
To: Stefan Rompf <stefan@loplof.de>
Cc: nigel@nigel.suspend2.net,
Kexec Mailing List <kexec@lists.infradead.org>,
linux-kernel@vger.kernel.org,
"Eric W. Biederman" <ebiederm@xmission.com>,
Pavel Machek <pavel@ucw.cz>,
Andrew Morton <akpm@linux-foundation.org>,
linux-pm@lists.linux-foundation.org,
Jeremy Maitin-Shepard <jbms@cmu.edu>
Subject: Re: [linux-pm] [RFC][PATCH 0/2 -mm] kexec based hibernation -v3
Date: Fri, 21 Sep 2007 16:47:11 +0800 [thread overview]
Message-ID: <1190364431.21818.186.camel@caritas-dev.intel.com> (raw)
In-Reply-To: <200709211043.38266.stefan@loplof.de>
On Fri, 2007-09-21 at 10:43 +0200, Stefan Rompf wrote:
> Am Donnerstag, 20. September 2007 07:34 schrieb Huang, Ying:
>
> > The hibernation procedure with the patch set is as follow:
> >
> > 1. Boot a kernel A
> >
> > 2. Work under kernel A
> >
> > 3. Kexec another kernel B (crash dump enabled) in kernel A.
>
> From a short glance over current Linus' arch/i386/kernel/machine_kexec.c,
> memory for the crash dump kernel B still needs to be reserved statically when
> booting A.
>
> This is one of the biggest issues with kexec based hibernation. For the
> typical notebook user, it is totally unacceptable to reserve 16 megabytes of
> memory just to be able to suspend to disk. And given the fact that current
> distribution kernels are quite modular and require early module loading, even
> more memory might be needed.
>
> IMHO, a plan how to fix this must exist or the concept of kexec based
> hibernation is a waste of time.
This issue has been resolved. The implementation method details in
another mail with title as follow:
[RFC][PATCH 1/2 -mm] kexec based hibernation -v3: kexec jump
Best Regards,
Huang Ying
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
WARNING: multiple messages have this Message-ID (diff)
From: "Huang, Ying" <ying.huang@intel.com>
To: Stefan Rompf <stefan@loplof.de>
Cc: linux-pm@lists.linux-foundation.org,
"Eric W. Biederman" <ebiederm@xmission.com>,
Pavel Machek <pavel@ucw.cz>,
nigel@nigel.suspend2.net,
Andrew Morton <akpm@linux-foundation.org>,
Jeremy Maitin-Shepard <jbms@cmu.edu>,
Kexec Mailing List <kexec@lists.infradead.org>,
linux-kernel@vger.kernel.org
Subject: Re: [linux-pm] [RFC][PATCH 0/2 -mm] kexec based hibernation -v3
Date: Fri, 21 Sep 2007 16:47:11 +0800 [thread overview]
Message-ID: <1190364431.21818.186.camel@caritas-dev.intel.com> (raw)
In-Reply-To: <200709211043.38266.stefan@loplof.de>
On Fri, 2007-09-21 at 10:43 +0200, Stefan Rompf wrote:
> Am Donnerstag, 20. September 2007 07:34 schrieb Huang, Ying:
>
> > The hibernation procedure with the patch set is as follow:
> >
> > 1. Boot a kernel A
> >
> > 2. Work under kernel A
> >
> > 3. Kexec another kernel B (crash dump enabled) in kernel A.
>
> From a short glance over current Linus' arch/i386/kernel/machine_kexec.c,
> memory for the crash dump kernel B still needs to be reserved statically when
> booting A.
>
> This is one of the biggest issues with kexec based hibernation. For the
> typical notebook user, it is totally unacceptable to reserve 16 megabytes of
> memory just to be able to suspend to disk. And given the fact that current
> distribution kernels are quite modular and require early module loading, even
> more memory might be needed.
>
> IMHO, a plan how to fix this must exist or the concept of kexec based
> hibernation is a waste of time.
This issue has been resolved. The implementation method details in
another mail with title as follow:
[RFC][PATCH 1/2 -mm] kexec based hibernation -v3: kexec jump
Best Regards,
Huang Ying
next prev parent reply other threads:[~2007-09-21 8:45 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-20 5:34 [RFC][PATCH 0/2 -mm] kexec based hibernation -v3 Huang, Ying
2007-09-20 5:34 ` Huang, Ying
2007-09-21 8:43 ` [linux-pm] " Stefan Rompf
2007-09-21 8:43 ` Stefan Rompf
2007-09-21 8:47 ` Huang, Ying
2007-09-21 8:47 ` Huang, Ying [this message]
2007-09-21 8:47 ` [linux-pm] " Huang, Ying
2007-09-21 8:43 ` Stefan Rompf
2007-09-21 9:47 ` [linux-pm] " Mika Penttilä
2007-09-21 9:47 ` Mika Penttilä
2007-09-21 13:44 ` huang ying
2007-09-21 13:44 ` huang ying
2007-09-21 14:56 ` Mika Penttilä
2007-09-21 14:56 ` [linux-pm] " Mika Penttilä
2007-09-21 14:56 ` Mika Penttilä
2007-09-21 15:13 ` huang ying
2007-09-21 15:13 ` huang ying
2007-09-21 15:13 ` Mika Penttilä
2007-09-21 15:13 ` [linux-pm] " Mika Penttilä
2007-09-21 15:13 ` Mika Penttilä
2007-09-21 15:41 ` huang ying
2007-09-21 15:41 ` huang ying
2007-09-21 9:47 ` Mika Penttilä
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