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Message-ID: <CAFLxGvzzHDRma_Y_XEpOD+fY+vonbkoR1mvQp4Vb4c3M6fTsPA@mail.gmail.com> Date: Thu, 16 Feb 2012 11:52:27 +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 11:30 PM, Rafael J. Wysocki <rjw@...k.pl> wrote: > On Thursday, March 24, 2011, richard -rw- weinberger wrote: >> 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. :) > > OK, thanks for the report. :-) > > Rafael Bad news: I saw the issue on 3.x too but thought it's because my IdeaPad s10 is crap. Now with my shiny new Lenovo x121e I have the same issue! :-( OpenSUSE 12.1, kernel 3.2.7. After a few suspend2disk iterations random files are corrupted. But only cached files. A reboot solves the problem. -- 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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