Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753972AbYCLPCO (ORCPT ); Wed, 12 Mar 2008 11:02:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751837AbYCLPBu (ORCPT ); Wed, 12 Mar 2008 11:01:50 -0400 Received: from iolanthe.rowland.org ([192.131.102.54]:47917 "HELO iolanthe.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751806AbYCLPBu (ORCPT ); Wed, 12 Mar 2008 11:01:50 -0400 Date: Wed, 12 Mar 2008 11:01:49 -0400 (EDT) From: Alan Stern X-X-Sender: stern@iolanthe.rowland.org To: "Huang, Ying" cc: "Rafael J. Wysocki" , , Kexec Mailing List , , "Eric W. Biederman" , Andrew Morton , , Vivek Goyal Subject: Re: [linux-pm] [PATCH -mm] kexec jump -v9 In-Reply-To: <1205286937.29875.9.camel@caritas-dev.intel.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 893 Lines: 23 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@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/