[Hardy] SRU: MSI-X allocation leakage

Stefan Bader stefan.bader at canonical.com
Mon Sep 22 12:31:14 UTC 2008


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

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)


When all other means of communication fail, try words!

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