Red Hat Bugzilla – Bug 162257
irq stacks not being used for hardirqs
Last modified: 2013-03-06 00:58:58 EST
Description of problem:
Currently, x86 boxes make use of a process's stack for hardirq handling. With 4K
stacks, we should really be using irq stacks which are per cpu
Version-Release number of selected component (if applicable):
We don't have any specific bugs for this issue. But this is a fundamental
assumption that kernel code relies upon, and is the default setup for 4K stacks
Steps to Reproduce:
*** Bug 162548 has been marked as a duplicate of this bug. ***
unfortunately, veritas' vxfs tends to use more stack space than other file
systems on linux. although we don't have any actual overflow cases in our
limited testing with 4 Kbyte stacks, we think they may well occur at customer
sites. so this bug is high priority for us.
since the bug report i opened was closed as a dup of this one, so i'd like to
change the priority of this bug to "high".
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.