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From: Nigel Cunningham <nigel@nigel.suspend2.net>
To: "Huang, Ying" <ying.huang@intel.com>
Cc: Kexec Mailing List <kexec@lists.infradead.org>,
	linux-kernel@vger.kernel.org, "Rafael J. Wysocki" <rjw@sisk.pl>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Pavel Machek <pavel@ucw.cz>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-pm@lists.linux-foundation.org
Subject: Re: [PATCH 0/3 -mm] kexec jump -v8
Date: Fri, 21 Dec 2007 19:35:27 +1100	[thread overview]
Message-ID: <476B7ACF.8020602@nigel.suspend2.net> (raw)
In-Reply-To: <1198222399.1965.15.camel@caritas-dev.intel.com>

Hi.

Huang, Ying wrote:
> This patchset provides an enhancement to kexec/kdump. It implements
> the following features:
> 
> - Backup/restore memory used both by the original kernel and the
>   kexeced kernel.

Why the kexeced kernel as well?

[...]

> The features of this patchset can be used as follow:
> 
> - Kernel/system debug through making system snapshot. You can make
>   system snapshot, jump back, do some thing and make another system
>   snapshot.

Are you somehow recording all the filesystem changes after the first
snapshot? If not, this is pointless (you'll end up with filesystem
corruption).

[...]

> - Cooperative multi-kernel/system. With kexec jump, you can switch
>   between several kernels/systems quickly without boot process except
>   the first time. This appears like swap a whole kernel/system out/in.

How is this useful to the end user?

Regards,

Nigel



_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec

WARNING: multiple messages have this Message-ID (diff)
From: Nigel Cunningham <nigel@nigel.suspend2.net>
To: "Huang, Ying" <ying.huang@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
	Pavel Machek <pavel@ucw.cz>, "Rafael J. Wysocki" <rjw@sisk.pl>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-kernel@vger.kernel.org,
	linux-pm@lists.linux-foundation.org,
	Kexec Mailing List <kexec@lists.infradead.org>
Subject: Re: [PATCH 0/3 -mm] kexec jump -v8
Date: Fri, 21 Dec 2007 19:35:27 +1100	[thread overview]
Message-ID: <476B7ACF.8020602@nigel.suspend2.net> (raw)
In-Reply-To: <1198222399.1965.15.camel@caritas-dev.intel.com>

Hi.

Huang, Ying wrote:
> This patchset provides an enhancement to kexec/kdump. It implements
> the following features:
> 
> - Backup/restore memory used both by the original kernel and the
>   kexeced kernel.

Why the kexeced kernel as well?

[...]

> The features of this patchset can be used as follow:
> 
> - Kernel/system debug through making system snapshot. You can make
>   system snapshot, jump back, do some thing and make another system
>   snapshot.

Are you somehow recording all the filesystem changes after the first
snapshot? If not, this is pointless (you'll end up with filesystem
corruption).

[...]

> - Cooperative multi-kernel/system. With kexec jump, you can switch
>   between several kernels/systems quickly without boot process except
>   the first time. This appears like swap a whole kernel/system out/in.

How is this useful to the end user?

Regards,

Nigel



  reply	other threads:[~2007-12-21  8:35 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-12-21  7:33 [PATCH 0/3 -mm] kexec jump -v8 Huang, Ying
2007-12-21  7:33 ` Huang, Ying
2007-12-21  8:35 ` Nigel Cunningham [this message]
2007-12-21  8:35   ` Nigel Cunningham
2007-12-21  8:53   ` Huang, Ying
2007-12-21  8:53   ` Huang, Ying
2007-12-21  8:53     ` Huang, Ying
2007-12-21  8:35 ` Nigel Cunningham
2007-12-27  1:57 ` Vivek Goyal
2007-12-27  1:57   ` Vivek Goyal
2007-12-27  2:33   ` Huang, Ying
2007-12-27  2:33   ` Huang, Ying
2007-12-27  2:33     ` Huang, Ying
2007-12-27 18:12     ` Vivek Goyal
2007-12-27 18:12       ` Vivek Goyal
2007-12-28  7:30       ` Huang, Ying
2007-12-28  7:30       ` Huang, Ying
2007-12-28  7:30         ` Huang, Ying
2007-12-27 18:12     ` Vivek Goyal
2007-12-27  1:57 ` Vivek Goyal
2007-12-28 21:33 ` Vivek Goyal
2007-12-28 21:33 ` Vivek Goyal
2007-12-28 21:33   ` Vivek Goyal
2007-12-29  2:00   ` Huang, Ying
2007-12-29  2:00   ` Huang, Ying
2007-12-29  2:00     ` Huang, Ying
2007-12-31 19:26     ` Vivek Goyal
2007-12-31 19:26       ` Vivek Goyal
2008-01-03  8:42       ` Huang, Ying
2008-01-03  8:42         ` Huang, Ying
2008-01-06 20:49         ` Vivek Goyal
2008-01-06 20:49           ` Vivek Goyal
2008-01-07  8:12           ` Huang, Ying
2008-01-07  8:12           ` Huang, Ying
2008-01-07  8:12             ` Huang, Ying
2008-01-06 20:49         ` Vivek Goyal
2008-01-03  8:42       ` Huang, Ying
2007-12-31 19:26     ` Vivek Goyal
  -- strict thread matches above, loose matches on Subject: below --
2007-12-21  7:33 Huang, Ying

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