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Bug#584230: marked as done (virtio_net: page allocation failure on memory pressure, disables network interface)

Your message dated Thu, 6 Jun 2013 00:14:58 +0200
with message-id <20130605221458.GG5444@pisco.westfalen.local>
and subject line Closing
has caused the Debian Bug report #584230,
regarding virtio_net: page allocation failure on memory pressure, disables network interface
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
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immediately.)


-- 
584230: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=584230
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: linux-2.6
Version: 2.6.26-22lenny1
Severity: normal

Hi,

I have noticed the following behaviour on a couple of our hosts running
2.6.26-2-amd64 inside a KVM instance with virtio network interfaces.

Upon memory pressure, the following error appears:

Jun  1 11:10:38 worker1 kernel: [533872.896187] swapper: page allocation failure. order:0, mode:0x20
Jun  1 11:10:38 worker1 kernel: [533872.896187] Pid: 0, comm: swapper Not tainted 2.6.26-2-amd64 #1
Jun  1 11:10:38 worker1 kernel: [533872.896187]
Jun  1 11:10:38 worker1 kernel: [533872.896187] Call Trace:
Jun  1 11:10:38 worker1 kernel: [533872.896187]  <IRQ>  [<ffffffff80276bc5>] __alloc_pages_internal+0x3a6/0x3bf
Jun  1 11:10:38 worker1 kernel: [533872.896187]  [<ffffffff802956d0>] kmem_getpages+0x96/0x15f
Jun  1 11:10:38 worker1 kernel: [533872.896187]  [<ffffffff80295d60>] fallback_alloc+0x16b/0x1e1
Jun  1 11:10:38 worker1 kernel: [533872.896187]  [<ffffffff8029593d>] kmem_cache_alloc_node+0x105/0x138
Jun  1 11:10:38 worker1 kernel: [533872.896187]  [<ffffffff803b65f9>] __alloc_skb+0x3c/0x12d
Jun  1 11:10:38 worker1 kernel: [533872.896187]  [<ffffffff803b758f>] __netdev_alloc_skb+0x29/0x43
Jun  1 11:10:38 worker1 kernel: [533872.896187]  [<ffffffffa0170187>] :virtio_net:try_fill_recv+0x32/0xf1
Jun  1 11:10:38 worker1 kernel: [533872.896187]  [<ffffffffa0170c01>] :virtio_net:virtnet_poll+0x214/0x2c3
Jun  1 11:10:38 worker1 kernel: [533872.896187]  [<ffffffff803bd117>] net_rx_action+0xab/0x1da
Jun  1 11:10:40 worker1 kernel: [533872.896187]  [<ffffffff8023936d>] __do_softirq+0x5c/0xd1
Jun  1 11:10:40 worker1 kernel: [533872.896187]  [<ffffffff8021c4ec>] ack_apic_level+0x53/0xd8
Jun  1 11:10:40 worker1 kernel: [533872.896187]  [<ffffffff8020d2dc>] call_softirq+0x1c/0x28
Jun  1 11:10:40 worker1 kernel: [533872.896187]  [<ffffffff8020f3e8>] do_softirq+0x3c/0x81
Jun  1 11:10:40 worker1 kernel: [533872.896187]  [<ffffffff802392cb>] irq_exit+0x3f/0x85
Jun  1 11:10:40 worker1 kernel: [533872.896187]  [<ffffffff8020f648>] do_IRQ+0xb9/0xd9
Jun  1 11:10:40 worker1 kernel: [533872.896187]  [<ffffffff8020b0ae>] default_idle+0x0/0x46
Jun  1 11:10:40 worker1 kernel: [533872.897055]  [<ffffffff8020c47d>] ret_from_intr+0x0/0x19
Jun  1 11:10:40 worker1 kernel: [533872.897055]  <EOI>  [<ffffffff8021eb64>] native_safe_halt+0x2/0x3
Jun  1 11:10:40 worker1 kernel: [533872.897055]  [<ffffffff8021eb64>] native_safe_halt+0x2/0x3
Jun  1 11:10:40 worker1 kernel: [533872.897055]  [<ffffffff8020b0d8>] default_idle+0x2a/0x46
Jun  1 11:10:40 worker1 kernel: [533872.897055]  [<ffffffff8020ad04>] cpu_idle+0x8e/0xb8
Jun  1 11:10:40 worker1 kernel: [533872.897055]
Jun  1 11:10:40 worker1 kernel: [533872.897055] Mem-info:
Jun  1 11:10:40 worker1 kernel: [533872.897055] Node 0 DMA per-cpu:
Jun  1 11:10:40 worker1 kernel: [533872.897055] CPU    0: hi:    0, btch:   1 usd:   0
Jun  1 11:10:40 worker1 kernel: [533872.897055] CPU    1: hi:    0, btch:   1 usd:   0
Jun  1 11:10:40 worker1 kernel: [533872.897055] Node 0 DMA32 per-cpu:
Jun  1 11:10:40 worker1 kernel: [533872.897055] CPU    0: hi:  186, btch:  31 usd: 185
Jun  1 11:10:40 worker1 kernel: [533872.897055] CPU    1: hi:  186, btch:  31 usd: 179
Jun  1 11:10:40 worker1 kernel: [533872.897055] Active:195926 inactive:49822 dirty:14192 writeback:8653 unstable:0
Jun  1 11:10:40 worker1 kernel: [533872.897055]  free:1342 slab:6630 mapped:1353 pagetables:713 bounce:0
Jun  1 11:10:40 worker1 kernel: [533872.899103] Node 0 DMA free:3988kB min:40kB low:48kB high:60kB active:5716kB inactive:1520kB present:10792kB pages_scanned:0 all_unreclaimable? no
Jun  1 11:10:40 worker1 kernel: [533872.899103] lowmem_reserve[]: 0 994 994 994
Jun  1 11:10:40 worker1 kernel: [533872.899103] Node 0 DMA32 free:1380kB min:4012kB low:5012kB high:6016kB active:777988kB inactive:197768kB present:1018016kB pages_scanned:143 all_unreclaimable? no
Jun  1 11:10:40 worker1 kernel: [533872.899103] lowmem_reserve[]: 0 0 0 0
Jun  1 11:10:40 worker1 kernel: [533872.899103] Node 0 DMA: 1*4kB 0*8kB 1*16kB 2*32kB 1*64kB 0*128kB 1*256kB 1*512kB 1*1024kB 1*2048kB 0*4096kB = 3988kB
Jun  1 11:10:40 worker1 kernel: [533872.928240] Node 0 DMA32: 0*4kB 1*8kB 0*16kB 1*32kB 0*64kB 0*128kB 1*256kB 0*512kB 1*1024kB 0*2048kB 0*4096kB = 1320kB
Jun  1 11:10:40 worker1 kernel: [533872.928240] 92409 total pagecache pages
Jun  1 11:10:40 worker1 kernel: [533872.928240] Swap cache: add 491980, delete 449040, find 122585/148674
Jun  1 11:10:40 worker1 kernel: [533872.928240] Free swap  = 216884kB
Jun  1 11:10:40 worker1 kernel: [533872.928240] Total swap = 514072kB
Jun  1 11:10:40 worker1 kernel: [533872.928240] 262128 pages of RAM
Jun  1 11:10:40 worker1 kernel: [533872.928240] 4927 reserved pages
Jun  1 11:10:40 worker1 kernel: [533872.928240] 27390 pages shared
Jun  1 11:10:40 worker1 kernel: [533872.928240] 42940 pages swap cached

After a couple of these backtraces (always by swapper), the virtio interface
freezes, i.e. stops receiving/transmitting traffic, until it is re-configured
using ifdown/ifup. 

This *might* be the same bug as
https://bugzilla.redhat.com/show_bug.cgi?id=520119
which was fixed upstream with this patch against 2.6.31:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=3161e453e4

Unfortunately, the 2.6.26 virtio code is significantly different and this patch
does not apply as-is, however it seems to me that 2.6.26 doesn't appear to be
checking for oom while allocating buffers as well.

Thanks,
Apollon

-- Package-specific info:
** Version:
Linux version 2.6.26-2-amd64 (Debian 2.6.26-22lenny1) (dannf@debian.org) (gcc version 4.1.3 20080704 (prerelease) (Debian 4.1.2-25)) #1 SMP Wed May 12 18:03:14 UTC 2010

** Command line:
root=/dev/mapper/local-root ro 

** Not tainted

** Model information
sys_vendor: 
product_name: 
product_version: 
chassis_vendor: 
chassis_version: 
bios_vendor: QEMU
bios_version: QEMU

** PCI devices:
not available

** USB devices:

-- System Information:
Debian Release: 5.0.4
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.26-2-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages linux-image-2.6.26-2-amd64 depends on:
ii  debconf [debconf-2.0]         1.5.24     Debian configuration management sy
ii  initramfs-tools [linux-initra 0.92o      tools for generating an initramfs
ii  module-init-tools             3.4-1      tools for managing Linux kernel mo

linux-image-2.6.26-2-amd64 recommends no packages.

Versions of packages linux-image-2.6.26-2-amd64 suggests:
ii  grub                       0.97-47lenny2 GRand Unified Bootloader (Legacy v
pn  linux-doc-2.6.26           <none>        (no description available)

Versions of packages linux-image-2.6.26-2-amd64 is related to:
pn  firmware-bnx2                 <none>     (no description available)
pn  firmware-bnx2x                <none>     (no description available)
pn  firmware-ipw2x00              <none>     (no description available)
pn  firmware-ivtv                 <none>     (no description available)
pn  firmware-iwlwifi              <none>     (no description available)
pn  firmware-linux                <none>     (no description available)
pn  firmware-linux-nonfree        <none>     (no description available)
pn  firmware-qlogic               <none>     (no description available)
pn  firmware-ralink               <none>     (no description available)

-- debconf information excluded


-- System Information:
Debian Release: 5.0.4
  APT prefers stable
  APT policy: (500, 'stable'), (80, 'testing'), (70, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=el_GR.UTF-8, LC_CTYPE=el_GR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages linux-image-2.6.26-2-amd64 depends on:
ii  debconf [debconf-2.0]         1.5.24     Debian configuration management sy
ii  initramfs-tools [linux-initra 0.92o      tools for generating an initramfs
ii  module-init-tools             3.4-1      tools for managing Linux kernel mo

linux-image-2.6.26-2-amd64 recommends no packages.

Versions of packages linux-image-2.6.26-2-amd64 suggests:
ii  grub-pc [grub]          1.96+20080724-16 GRand Unified Bootloader, version 
ii  linux-doc-2.6.26        2.6.26-22lenny1  Linux kernel specific documentatio

Versions of packages linux-image-2.6.26-2-amd64 is related to:
pn  firmware-bnx2                 <none>     (no description available)
pn  firmware-bnx2x                <none>     (no description available)
pn  firmware-ipw2x00              <none>     (no description available)
pn  firmware-ivtv                 <none>     (no description available)
pn  firmware-iwlwifi              <none>     (no description available)
pn  firmware-linux                <none>     (no description available)
ii  firmware-linux-nonfree        0.22       Binary firmware for various driver
pn  firmware-qlogic               <none>     (no description available)
pn  firmware-ralink               <none>     (no description available)

-- debconf information excluded

--- End Message ---
--- Begin Message --- 
Hi,
your bug has been filed against the "linux-2.6" source package and was filed for
a kernel older than the recently released Debian 7.0 / Wheezy with a severity
less than important.

We don't have the ressources to reproduce the complete backlog of all older kernel
bugs, so we're closing this bug for now. If you can reproduce the bug with Debian Wheezy
or a more recent kernel from testing or unstable, please reopen the bug by sending
a mail to control@bugs.debian.org with the following three commands included in the
mail:

reopen BUGNUMBER
reassign BUGNUMBER src:linux
thanks

Cheers,
        Moritz

--- End Message ---
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