[Bug 51301] New: [-next-20121129] memory leak/page allocator fragmentation?

[Bug 51301] New: [-next-20121129] memory leak/page allocator fragmentation?

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=51301

           Summary: [-next-20121129] memory leak/page allocator
                    fragmentation?
           Product: Virtualization
           Version: unspecified
    Kernel Version: -next-20121129
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: kvm
        AssignedTo: virtualization_kvm@kernel-bugs.osdl.org
        ReportedBy: peter@hurleysoftware.com
        Regression: No


With a single 2Gb/4-core VM on a 10Gb/8-core host, the _host_ ran out of 32kb
page blocks. I can't be certain that it was kvm because the OOM condition
triggered a GP fault in the SLUB allocator. (The other suspect is nouveau.)

I have attached the kernel log and a SysRq Show Memory dump of the machine
shortly after boot without running kvm.

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[Bug 51301] [-next-20121129] memory leak/page allocator fragmentation?

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https://bugzilla.kernel.org/show_bug.cgi?id=51301





--- Comment #1 from Peter Hurley <peter@hurleysoftware.com>  2012-12-04 16:09:26 ---
Created an attachment (id=88441)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=88441)
kernel log showing OOM condition

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[Bug 51301] [-next-20121129] memory leak/page allocator fragmentation?

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https://bugzilla.kernel.org/show_bug.cgi?id=51301





--- Comment #2 from Peter Hurley <peter@hurleysoftware.com>  2012-12-04 16:11:10 ---
Created an attachment (id=88451)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=88451)
sysrq/show memory without kvm shortly after boot

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[Bug 51301] [-next-20121129] memory leak/page allocator fragmentation?

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https://bugzilla.kernel.org/show_bug.cgi?id=51301





--- Comment #3 from Peter Hurley <peter@hurleysoftware.com>  2012-12-04 16:23:47 ---
Created an attachment (id=88461)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=88461)
sysrq/show memory with kvm running a single 2gb vm

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[Bug 51301] [-next-20121129] memory leak/page allocator fragmentation?

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https://bugzilla.kernel.org/show_bug.cgi?id=51301





--- Comment #4 from Peter Hurley <peter@hurleysoftware.com>  2012-12-04 16:48:22 ---
Not sure why I picked kvm/nouveau for this OOM ;)

Could be any number of apps over a 3.5 period...

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[Bug 51301] [-next-20121129] memory leak/page allocator fragmentation?

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https://bugzilla.kernel.org/show_bug.cgi?id=51301


Marcelo Tosatti <mtosatti@redhat.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mtosatti@redhat.com




--- Comment #5 from Marcelo Tosatti <mtosatti@redhat.com>  2012-12-04 21:42:00 ---
Dec  4 09:38:25 thor kernel: [322576.251464] firefox: page allocation failure:
order:4, mode:0x80c0d0

This is an order-4 allocation failure. This is due to kernel failure to
allocate physically contiguous region of memory. Please reassign to "Memory
Management" component.

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[Bug 51301] [-next-20121129] memory leak/page allocator fragmentation?

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https://bugzilla.kernel.org/show_bug.cgi?id=51301


Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alan@lxorguk.ukuu.org.uk
          Component|kvm                         |Page Allocator
            Version|unspecified                 |2.5
         AssignedTo|virtualization_kvm@kernel-b |akpm@linux-foundation.org
                   |ugs.osdl.org                |
            Product|Virtualization              |Memory Management




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