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Thread: AVG Scan causing Kernel Failure

  1. #21
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    Default Re: AVG Scan causing Kernel Failure

    On 05/04/2011 04:28 PM, Carlos E. R. wrote:
    >> -software raid is junk (invented by folks who $ELL $oftware)

    >
    > No :-)
    >
    > Fake raid is junk, although it serves a purpose.


    _that_, is exactly what i *meant* to write.


    > > That's what I was thinking - I promise I had not read this paragraph when I

    > wrote mine :-)


    NOT a problem!

    --
    CAVEAT: http://is.gd/bpoMD
    [openSUSE11.3 + KDE4.5.5 + Firefox3.6.17 + Thunderbird3.1.10 via NNTP]
    HACK Everything -> http://www.youtube.com/watch?v=j5b4CCe9pS8&NR=1

  2. #22
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    Default Re: AVG Scan causing Kernel Failure

    On 2011-05-04 04:36, PsychoGTI wrote:
    >
    > robin_listas;2334180 Wrote:
    >>
    >> Maybe the problem is not memory, but disk.
    >>
    >> The crash is sudden and fast, or slow?
    >>

    >
    > The crash is definitely very fast and all of a sudden. The screen
    > blanks out, and next thing you know it you're looking at the bios
    > mem-check screen. No sign, no warning, no nothing.


    Typically, if the hard disk fails the kernel has time to complain bitterly
    and you have time to jump to VT10 and see the messages. Specially so if it
    is a data disk, not the system disk or swap.


    > Are you suggesting setting up a separate spare disc as a single root OS
    > drive, just for testing? What about using a bootable live disc as a
    > test?


    Yep, as a testing, to see if your disk setup is a problem.

    --
    Cheers / Saludos,

    Carlos E. R.
    (from 11.2 x86_64 "Emerald" at Telcontar)

  3. #23
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    Default Re: AVG Scan causing Kernel Failure

    Okay, I got several suggestions to work through here, so I'll start making my through them and give feedback, testing as I go to try and pin-point this issue.


    Quote Originally Posted by robin_listas View Post
    On 2011-05-04 08:32, DenverD wrote:
    > On 05/04/2011 04:36 AM, PsychoGTI wrote:


    >> Is there a way to test the write to swap ability?


    Hibernating.

    Writing a C program that reserves large chunks of memory.

    dd can be used for that, sort of.

    dd if=/dev/null of=/dev/null bs=1G count=1

    will use one giga. You can try more, or several processes in parallel.
    The dd command didn't seem to work. I was monitoring memory usage and such, and the dd command did seem to want to do something, but it happened uber-quick. The mem used never wavered/increased. However, this did give me some ideas, and I did play around with dd and figured out that once breaching the max RAM + Swap it would throw an error. Other than that, all was well, and usage did change (at least not according to top and system monitor)

    Hibernating was completely successful. And even upon return, top reported that 3M of swap was currently being used. Which seems to indicate a successful test.

  4. #24
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    Default Re: AVG Scan causing Kernel Failure

    Quote Originally Posted by DenverD View Post
    turn off/kill/drown the watchdog timer and see if your problems fade away..
    Hmmmm.... I can't seem to figure out how to disable watchdog. Suggestions? Google has suggested a few things, but not Suse specific... which seems to matter for this one (I don't see it as a running service for example, and there's a million watchdogs)... and some documentation says you can't disable it once the kernel has been compiled.

  5. #25
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    Default Re: AVG Scan causing Kernel Failure

    On 05/05/2011 04:06 AM, PsychoGTI wrote:
    >
    > Hmmmm.... I can't seem to figure out how to disable watchdog.
    > Suggestions?


    well, i just saw (in the paste) that "iTCO_wdt: Unexpected close, not
    stopping watchdog!" just before the first "Marking nosave pages" and
    _guessed_..

    and, if it is not possible to go down the path of my guess, then maybe i
    was wrong (it is possible--some would say...maybe the 'problem' is in
    the preceeding line "Started sntp", so turn it off and see what happens..

    maybe you should use ntp instead (i *am* guessing, but i reckon you
    should be using ntp....your hardware, your system, you can put the
    magnifying glass to your hard/softeware documentation--what kind of
    external time input does it need/expect? [i just looked, my old desktop
    defaulted to using the more robust ntp, rather than sntp, so ???])

    btw: i'm always guessing, so read my sig caveat often!

    --
    CAVEAT: http://is.gd/bpoMD
    [openSUSE11.3 + KDE4.5.5 + Firefox3.6.17 + Thunderbird3.1.10 via NNTP]
    HACK Everything -> http://www.youtube.com/watch?v=j5b4CCe9pS8&NR=1

  6. #26
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    Default Re: AVG Scan causing Kernel Failure

    On 2011-05-05 09:57, DenverD wrote:
    > On 05/05/2011 04:06 AM, PsychoGTI wrote:
    >>
    >> Hmmmm.... I can't seem to figure out how to disable watchdog.
    >> Suggestions?

    >
    > well, i just saw (in the paste) that "iTCO_wdt: Unexpected close, not
    > stopping watchdog!" just before the first "Marking nosave pages" and
    > _guessed_..


    Google finds bugs related to it.

    https://bugzilla.redhat.com/show_bug.cgi?id=575417

    iTCO_wdt: Unexpected close, not stopping watchdog!
    Then about a minute or two later the machine reboots. Though the boot
    process continues in up until that point. I have about enough time to do a
    graphical login. I can do a bit more if I boot to run level 1 or 3.
    Reverting to 151-3.fc13 fixed the problem.


    http://fixunix.com/kernel/356431-itc...dog-timer.html

    Reading a bit it does seem that watchdog can cause the system to reboot. By
    hardware. I think it matches.


    http://www.mjmwired.net/kernel/Docum...tchdog/wdt.txt

    All the interfaces provide /dev/watchdog, which when open must be written
    to within a timeout or the machine will reboot. Each write delays the
    reboot time another timeout. In the case of the software watchdog the
    ability to reboot will depend on the state of the machines and interrupts.
    The hardware boards physically pull the machine down off their own onboard
    timers and will reboot from almost anything.

    I think PsychoGTI should concentrate on disabling this thing. There must be
    a way. At worst, recompile the kernel, it's worth it. An then, a Bugzilla.

    Comment 6 on the redhat bugzilla says how.

    >
    > and, if it is not possible to go down the path of my guess, then maybe i
    > was wrong (it is possible--some would say...maybe the 'problem' is in the
    > preceeding line "Started sntp", so turn it off and see what happens..


    Mmm... didn't know there were both sntp and ntp. What service starts it (Sntp)?

    --
    Cheers / Saludos,

    Carlos E. R.
    (from 11.2 x86_64 "Emerald" at Telcontar)

  7. #27
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    Default Re: AVG Scan causing Kernel Failure

    On 05/05/2011 11:33 AM, Carlos E. R. wrote:
    > Mmm... didn't know there were both sntp and ntp. What service starts it (Sntp)?


    i didn't know there were two either, until i searched and found:

    http://www.ntp.org/ntpfaq/NTP-s-def.htm#AEN1271

    have no idea what service starts....hmmmmmm, maybe it is started as ntp,
    but the hardware says "no thanks" an ntpd automatically negotiates down
    to sntp..... i've seen stranger stuff, huh?

    --
    CAVEAT: http://is.gd/bpoMD
    [openSUSE11.3 + KDE4.5.5 + Firefox3.6.17 + Thunderbird3.1.10 via NNTP]
    HACK Everything -> http://www.youtube.com/watch?v=j5b4CCe9pS8&NR=1

  8. #28
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    Default Re: AVG Scan causing Kernel Failure

    Quote Originally Posted by DenverD View Post
    hmmmm, that last one caused me to think...if you wish, before you do
    surgery (removing drives and replacing with one, for a test) you might
    want to remove X from the equation....you have not declared which AVG
    you are running but i'm pretty confident whatever it is is doesn't
    require a GUI, so with the system and hardware you have boot to runlevel
    three and see if it will complete the scan with rebooting...if it does
    maybe it is an X problem, and neither a kernel nor RAID problem!
    So I've been working on this one. Unfortunately, it did not make a difference. AVG still hard reset the PC after a while. But this got me thinking of a few other things to try. I ended up playing around with the avgscan settings, trying to make the simplest system scan possible (disable logging and such) to try to lighten the load or see if this is just an avg issue... but no luck.

    Was a good idea though....

  9. #29
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    Default Re: AVG Scan causing Kernel Failure

    Quote Originally Posted by DenverD View Post
    On 05/05/2011 11:33 AM, Carlos E. R. wrote:
    > Mmm... didn't know there were both sntp and ntp. What service starts it (Sntp)?


    i didn't know there were two either, until i searched and found:

    What is NTP?

    have no idea what service starts....hmmmmmm, maybe it is started as ntp,
    but the hardware says "no thanks" an ntpd automatically negotiates down
    to sntp..... i've seen stranger stuff, huh?
    This is really interesting. I never paid any attention to the sntp messages throughout the log... there's a lot of them. NTP setup was just simply done through YaST.

    I'll try disabling NTP outright for the time being and see if that makes a difference.

  10. #30
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    Default Re: AVG Scan causing Kernel Failure

    Quote Originally Posted by DenverD View Post
    hmmmm...............i googled "Marking nosave pages" and found 21k hits
    with problems associated like acpi, hibernate, display and after
    scanning a few pages of hits, i changed the search string, and leave it
    to you to dig into these ~65 deeply: "Marking nosave pages" -boot -hibernate +reboot OR uncommanded - Google Search
    I've checked out your search, and have done a few others of my own. One common point in a lot of those search results is the solution was to update to a newer kernel version, and then the problem magically went away. I'll give this a try later tonight as well... I'm leaving it as a last resort, as I don't want to pooch my machine any further with an RC release kernel.

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