Bug 162257 - irq stacks not being used for hardirqs
irq stacks not being used for hardirqs
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Jason Baron
Brian Brock
Depends On:
Blocks: 156322
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Reported: 2005-07-01 14:48 EDT by Jason Baron
Modified: 2013-03-06 00:58 EST (History)
5 users (show)

See Also:
Fixed In Version: RHSA-2005-514
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2005-10-05 09:38:56 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Jason Baron 2005-07-01 14:48:25 EDT
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):

How reproducible:

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:
Actual results:

Expected results:

Additional info:
Comment 4 Jason Baron 2005-07-06 12:06:20 EDT
*** Bug 162548 has been marked as a duplicate of this bug. ***
Comment 6 craig harmer 2005-07-07 03:56:37 EDT
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".
Comment 12 Red Hat Bugzilla 2005-10-05 09:38:57 EDT
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.


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