Red Hat Bugzilla – Bug 112579
redzone reducation for kernel stack overflow
Last modified: 2007-11-30 17:06:53 EST
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User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)
Description of problem:
Request to backport redzone threshold change from rhel 3 to 2.1.
Reduces the redzone from 2-1K.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Large enterprise configurations
Actual Results: Messages fill up the console warning the user of a
pending stack overflow before it is needed.
Although the U3 kernel still has the stack overflow warning messages,
we did a lot to reduce stack usage. its certainly worth verifying
whether or not the latest errata kernel still exhibits this behavior.
The kernel is e.34.
Any specifics on what was done? As you might know it is hard to
reproduce this environment, and if I suggest to a customer to update,
they will want to know what was done to impact the stack situation?
Changes included: compiler changes, the addition of an irqbalance
daemon, as well as reductions in certain kernel functions.
Same deal as BZ 112577 - this issue has been corrected in QU3.
Removing from the Blocker list. We can consider this request if
veritas can demonstrate a need with current kernels.
Was made tunable in the softirq defer patch.