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Message-Id: <201103240000.26788.rjw@sisk.pl> Date: Thu, 24 Mar 2011 00:00:26 +0100 From: "Rafael J. Wysocki" <rjw@...k.pl> To: "richard -rw- weinberger" <richard.weinberger@...il.com> Cc: LKML <linux-kernel@...r.kernel.org>, linux-pm@...ts.linux-foundation.org Subject: Re: Corrupted files after suspend to disk On Wednesday, March 23, 2011, richard -rw- weinberger wrote: > On Wed, Mar 23, 2011 at 11:22 PM, Rafael J. Wysocki <rjw@...k.pl> wrote: > > On Wednesday, March 23, 2011, richard -rw- weinberger wrote: > >> On Wed, Mar 23, 2011 at 11:11 PM, Rafael J. Wysocki <rjw@...k.pl> wrote: > >> > On Wednesday, March 23, 2011, richard -rw- weinberger wrote: > >> >> 2011/3/23 Rafael J. Wysocki <rjw@...k.pl>: > >> >> > On Wednesday, March 23, 2011, richard -rw- weinberger wrote: > >> >> >> Hi, > >> >> >> > >> >> >> I'm facing a very strange problem on my netbook (Lenovo Ideapad S10) > >> >> >> running Linux 2.6.37.4. > >> >> >> After resuming from s2disk some files are corrupted. > >> >> >> But when I reboot my netbook everything seems good again. > >> >> >> > >> >> >> When I saw the problem the first time the ls command segfaulted always. > >> >> >> I did a reboot and it worked again. > >> >> >> > >> >> >> A few days later zypper crashed. After a reboot it worked again. > >> >> >> And today ssh crashed. I looked a bit closer and saw it crashed > >> >> >> somewhere within libcrypto. > >> >> >> So I made copy libcrypto and rebooted. > >> >> >> After the reboot ssh worked again but libcrypto and the copy of it hat > >> >> >> a different sha1 sum! > >> >> >> WTF?! > >> >> >> > >> >> >> Is this a known issue? > >> >> > > >> >> > No. > >> >> > > >> >> >> dmesgs and config are attached. > >> >> >> > >> >> >> The used distribution is openSUSE 11.4 with suspend-0.80.20100129-7.1 > >> >> >> (default from suse). > >> >> >> I'm using ext3 as root filesystem. > >> >> >> What else do you need? > >> >> > > >> >> > Whatever you can do to narrow down the problem. At the moment I only know > >> >> > that it's there. > >> >> > >> >> I can reproduce the problem now. > >> >> After ~20 suspend and resume iterations aide finds corrupted files in /lib/. > >> >> It's always a very basic lib like libcrypto, libglib which is used all > >> >> the time on my system. > >> > > >> > Those files are never intentionally modified, right? > >> > > >> >> Maybe it's an issue like this one? > >> >> https://lkml.org/lkml/2010/12/2/339 > >> > > >> > It might have if that patch hadn't been merged before 2.6.37. > >> > > >> > Is the system 32-bit or 64-bit? > >> > >> It's a 32-bit system. > >> cmp shows that the corrupted files differ in many bytes (not scattered). > >> The corrupted bytes are always 0 or 252. > > > > Do I understand correctly that the files apparently corrupted after resume > > are not corrupted any more when you reboot? > > Yes. > Seems like a cache issue. There's a couple things you can check before we start asking other people for help. First, it would be good to know if things change when you save the image into a swap file instead of the swap partition you've been using so far (I believe it's documented quite well how to do that). Second, please verify if using the built-in save/load hibernate code leads to the same issue (you can hibernate by doing "echo disk > /sys/power/state" to verify that). Of course, please test the above separately. :-) Thanks, Rafael -- 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/
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