Red Hat Bugzilla – Bug 243648
softirq-defer patch is broken
Last modified: 2007-11-16 20:14:46 EST
The softirq-defer patch is broken on x86_64 because of the IRQ stack. It should
either be disabled on x86_64 or modified to handle the IRQ stack. As it is
softirq's arriving through the IRQ stack can be delayed. It just happens that
most of them punch through because most task pointers are less then the IRQ
stack pointer (but not all, e.g. the idle thread).
This bug is filed against RHEL 3, which is in maintenance phase.
During the maintenance phase, only security errata and select mission
critical bug fixes will be released for enterprise products. Since
this bug does not meet that criteria, it is now being closed.
For more information of the RHEL errata support policy, please visit:
If you feel this bug is indeed mission critical, please contact your
support representative. You may be asked to provide detailed
information on how this bug is affecting you.