Message-ID: <466CAD2D.3070607@zytor.com>
Date: Sun, 10 Jun 2007 19:02:21 -0700
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Matthew Garrett <mjg59@srcf.ucam.org>
CC: Pavel Machek <pavel@ucw.cz>, Jeremy Maitin-Shepard <jbms@cmu.edu>,
       "Rafael J. Wysocki" <rjw@sisk.pl>, linux-kernel@vger.kernel.org,
       Linus Torvalds <torvalds@osdl.org>,
       Nigel Cunningham <nigel@nigel.suspend2.net>
Subject: Re: A kexec approach to hibernation
References: <878xb3l888.fsf@jbms.ath.cx> <200706020114.37245.rjw@sisk.pl> <87odjz9qo9.fsf@jbms.ath.cx> <200706020233.44509.rjw@sisk.pl> <87k5un9l4n.fsf@jbms.ath.cx> <20070604104621.GB4405@elf.ucw.cz> <20070604122054.GB26615@srcf.ucam.org> <20070604131000.GD1971@elf.ucw.cz> <20070604131624.GA27565@srcf.ucam.org>
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Matthew Garrett wrote:
> No, it only supports ext2 (and reading ext3 as if it's ext2). Right now, 
> the assumption that syncing during suspend will cause data to hit 
> something grub can read isn't a safe one.

I brought this issue up quite a few years ago at an OLS BOF.  We pretty
much need a "supersync" system call; you can do this by bmapping any
file on ext3, but having something supported across filesystems would be
good.

	-hpa
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