From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rafael J. Wysocki" Subject: Re: [linux-lvm] 2.6.22-rc5 XFS fails after hibernate/resume Date: Mon, 2 Jul 2007 22:15:11 +0200 Message-ID: <200707022215.12200.rjw@sisk.pl> References: <46744065.6060605@dgreaves.com> <200707021712.50323.rjw@sisk.pl> <4689298B.2000407@dgreaves.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4689298B.2000407@dgreaves.com> Content-Disposition: inline Sender: linux-raid-owner@vger.kernel.org To: David Greaves Cc: Tejun Heo , David Chinner , David Robinson , LVM general discussion and development , "'linux-kernel@vger.kernel.org'" , xfs@oss.sgi.com, linux-pm , LinuxRaid List-Id: linux-raid.ids On Monday, 2 July 2007 18:36, David Greaves wrote: > Rafael J. Wysocki wrote: > > On Monday, 2 July 2007 16:32, David Greaves wrote: > >> Rafael J. Wysocki wrote: > >>> On Monday, 2 July 2007 12:56, Tejun Heo wrote: > >>>> David Greaves wrote: > >>>>>> Tejun Heo wrote: > >>>>>>> It's really weird tho. The PHY RDY status changed events are coming > >>>>>>> from the device which is NOT used while resuming > >>>>> There is an obvious problem there though Tejun (the errors even when sda > >>>>> isn't involved in the OS boot) - can I start another thread about that > >>>>> issue/bug later? I need to reshuffle partitions so I'd rather get the > >>>>> hibernate working first and then go back to it if that's OK? > >>>> Yeah, sure. The problem is that we don't know whether or how those two > >>>> are related. It would be great if there's a way to verify memory image > >>>> read from hibernation is intact. Rafael, any ideas? > >>> Well, s2disk has an option to compute an MD5 checksum of the image during > >>> the hibernation and verify it while reading the image. > >> (Assuming you mean the mainline version) > >> > >> Sounds like a good think to try next... > >> Couldn't see anything on this in ../Documentation/power/* > >> How do I enable it? > > > > Add 'compute checksum = y' to the s2disk's configuration file. > > Ah, right - that's uswsusp isn't it? Which isn't what I'm having problems with > AFAIK? > > My suspend procedure is: > > xfs_freeze -f /scratch > sync > echo platform > /sys/power/disk > echo disk > /sys/power/state > xfs_freeze -u /scratch > > Which should work (actually it should work without the sync/xfs_freeze too). > > So to debug the problem I'd like to minimally extend this process rather than > replace it with another approach. Well, this is not entirely "another approach". Only the saving of the image is done differently, the rest is the same. > I take it there isn't an 'echo y > /sys/power/do_image_checksum'? No, there is not anything like that. Greetings, Rafael -- "Premature optimization is the root of all evil." - Donald Knuth