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Message-ID: <AANLkTikui_HQ5JMcMJUqMr9WLyTRNzF-z4G7wAUNPOFy@mail.gmail.com> Date: Thu, 24 Mar 2011 20:37:53 +0100 From: richard -rw- weinberger <richard.weinberger@...il.com> To: "Rafael J. Wysocki" <rjw@...k.pl> Cc: LKML <linux-kernel@...r.kernel.org>, linux-pm@...ts.linux-foundation.org Subject: Re: Corrupted files after suspend to disk On Thu, Mar 24, 2011 at 11:16 AM, richard -rw- weinberger <richard.weinberger@...il.com> wrote: > On Thu, Mar 24, 2011 at 12:00 AM, Rafael J. Wysocki <rjw@...k.pl> wrote: >> 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. :-) > > Ok, I'll test this when I'm at home. > > BTW: dropping the caches helps, when some files seem corrupted. > Today /usr/bin/okular was broken. > After setting vm.drop_caches=1 it worked again. > >> 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/ >> > > -- > Thanks, > //richard > On Linux 2.6.38 I'm unable to reproduce the issue. Only 2.6.37 seems to be affected. So, I'm moving over to 2.6.38. :) -- Thanks, //richard -- 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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