Ubuntu
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[Hardy] Fix MSI-X allocation leakage

Bug #273103 reported by Stefan Bader
6
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Fix Released
Low
Stefan Bader
Hardy
Fix Released
Low
Stefan Bader

Bug Description

This is a tracking bug to fix the following problem (patch in 2.6.24-stable):

This bug was introduced in the 2.6.24 lguest tree merge, where MSI-X vector allocation will eventually fail. The cause is the new bit array tracking used vectors is not getting cleared properly on IRQ destruction on the 32-bit APIC code.

This can be seen easily using the ixgbe 10 GbE driver on multi-core systems by simply loading and unloading the driver a few times. Depending on the number of available vectors on the host system, the MSI-X allocation will eventually fail, and the driver will only be able to use legacy interrupts.

Revision history for this message
Stefan Bader (smb) wrote :
Changed in linux:
assignee: nobody → stefan-bader-canonical
importance: Undecided → Low
status: New → In Progress
Revision history for this message
Stefan Bader (smb) wrote :

http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-hardy.git;a=commitdiff;h=e16bdbc3b9ada00eb8dce7715488bbcbea2e28be

Changed in linux:
assignee: nobody → stefan-bader-canonical
importance: Undecided → Low
status: New → Fix Committed
Revision history for this message
Stefan Bader (smb) wrote :

Already included in Intrepid

Changed in linux:
status: In Progress → Fix Released
Revision history for this message
Stefan Bader (smb) wrote :

SRU justification:

Impact: After several unload/load cycles the resources for MSI(-X) interrupts
cannot be allocated anymore and drivers will have to fall back to legacy
interrupts.

Fix: Patch from 2.6.24.y stable tree to update the allocation bitmap on unload.

Testcase: Unload and load a driver module that uses MSI(-X) interrupts on
hardware that supports it. After a while error messages will indicate that the
driver had to fallback to legacy interrupts (without patch)

Revision history for this message
Martin Pitt (pitti) wrote :

linux 2.6.24-21 copied to hardy-updates.

Changed in linux:
status: Fix Committed → Fix Released
Martin Pitt (pitti)
Changed in linux:
status: Fix Released → In Progress
Revision history for this message
Martin Pitt (pitti) wrote :

Accepted into intrepid-proposed, please test and give feedback here. Please see https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

Revision history for this message
Martin Pitt (pitti) wrote :

Accepted into hardy-proposed, please test and give feedback here. Please see https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

Changed in linux:
status: In Progress → Fix Committed
Revision history for this message
Martin Pitt (pitti) wrote :

Accepted linux into hardy-proposed, please test and give feedback here. Please see https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

Revision history for this message
Launchpad Janitor (janitor) wrote :
Download full text (12.0 KiB)

This bug was fixed in the package linux - 2.6.24-23.46

---------------
linux (2.6.24-23.46) hardy-proposed; urgency=low

  [Alessio Igor Bogani]

  * rt: Updated PREEMPT_RT support to rt21
    - LP: #302138

  [Amit Kucheria]

  * SAUCE: Update lpia patches from moblin tree
    - LP: #291457

  [Andy Whitcroft]

  * SAUCE: replace gfs2_bitfit with upstream version to prevent oops
    - LP: #276641

  [Colin Ian King]

  * isdn: Do not validate ISDN net device address prior to interface-up
    - LP: #237306
  * hwmon: (coretemp) Add Penryn CPU to coretemp
    - LP: #235119
  * USB: add support for Motorola ROKR Z6 cellphone in mass storage mode
    - LP: #263217
  * md: fix an occasional deadlock in raid5
    - LP: #208551

  [Stefan Bader]

  * SAUCE: buildenv: Show CVE entries in printchanges
  * SAUCE: buildenv: Send git-ubuntu-log informational message to stderr
  * Xen: dma: avoid unnecessarily SWIOTLB bounce buffering
    - LP: #247148
  * Update openvz patchset to apply to latest stable tree.
    - LP: #301634
  * XEN: Fix FTBS with stable updates
    - LP: #301634

  [Steve Conklin]

  * Add HID quirk for dual USB gamepad
    - LP: #140608

  [Tim Gardner]

  * Enable CONFIG_AX25_DAMA_SLAVE=y
    - LP: #257684
  * SAUCE: Correctly blacklist Thinkpad r40e in ACPI
    - LP: #278794
  * SAUCE: ALPS touchpad for Dell Latitude E6500/E6400
    - LP: #270643

  [Upstream Kernel Changes]

  * Revert "[Bluetooth] Eliminate checks for impossible conditions in IRQ
    handler"
    - LP: #217659
  * KVM: VMX: Clear CR4.VMXE in hardware_disable
    - LP: #268981
  * iov_iter_advance() fix
    - LP: #231746
  * Fix off-by-one error in iov_iter_advance()
    - LP: #231746
  * USB: serial: ch341: New VID/PID for CH341 USB-serial
    - LP: #272485
  * x86: Fix 32-bit x86 MSI-X allocation leakage
    - LP: #273103
  * b43legacy: Fix failure in rate-adjustment mechanism
    - LP: #273143
  * x86: Reserve FIRST_DEVICE_VECTOR in used_vectors bitmap.
    - LP: #276334
  * openvz: merge missed fixes from vanilla 2.6.24 openvz branch
    - LP: #298059
  * openvz: some autofs related fixes
    - LP: #298059
  * openvz: fix ve stop deadlock after nfs connect
    - LP: #298059
  * openvz: fix netlink and rtnl inside container
    - LP: #298059
  * openvz: fix wrong size of ub0_percpu
    - LP: #298059
  * openvz: fix OOPS while stopping VE started before binfmt_misc.ko loaded
    - LP: #298059
  * x86-64: Fix "bytes left to copy" return value for copy_from_user()
  * NET: Fix race in dev_close(). (Bug 9750)
    - LP: #301608
  * IPV6: Fix IPsec datagram fragmentation
    - LP: #301608
  * IPV6: dst_entry leak in ip4ip6_err.
    - LP: #301608
  * IPV4: Remove IP_TOS setting privilege checks.
    - LP: #301608
  * IPCONFIG: The kernel gets no IP from some DHCP servers
    - LP: #301608
  * IPCOMP: Disable BH on output when using shared tfm
    - LP: #301608
  * IRQ_NOPROBE helper functions
    - LP: #301608
  * MIPS: Mark all but i8259 interrupts as no-probe.
    - LP: #301608
  * ub: fix up the conversion to sg_init_table()
    - LP: #301608
  * x86: adjust enable_NMI_through_LVT0()
    - LP: #301608
  * SCSI ips: handle scsi_add_host() failure, and other err cl...

Changed in linux:
status: Fix Committed → Fix Released
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