linux-kernel - Re: [linux-pm] [PATCH -mm] kexec jump -v9

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Pine.LNX.4.44L0.0803121055510.4595-100000@iolanthe.rowland.org>
Date:	Wed, 12 Mar 2008 11:01:49 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	"Huang, Ying" <ying.huang@...el.com>
cc:	"Rafael J. Wysocki" <rjw@...k.pl>, <nigel@...el.suspend2.net>,
	Kexec Mailing List <kexec@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	<linux-pm@...ts.linux-foundation.org>,
	Vivek Goyal <vgoyal@...hat.com>
Subject: Re: [linux-pm] [PATCH -mm] kexec jump -v9

On Wed, 12 Mar 2008, Huang, Ying wrote:

> I think "kexec based hibernation" is the only currently available
> possible method to write out image without freezer (after driver works
> are done). If other process is running, how to prevent them from writing
> to disk without freezing them in current implementation?

This is a very good question.

It's a matter of managing the block layer's request queues.  Somehow 
the existing I/O requests must remain blocked while the requests needed 
for writing the image must be allowed to proceed.

I don't know what would be needed to make this work, but it ought to be 
possible somehow...

Alan Stern

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/