Red Hat Bugzilla – Bug 157239
Systemtap patches to be ported to RHEL4 U2 kernel
Last modified: 2013-03-06 00:58:57 EST
There are a number of kprobes related patches making their way upstream for
They need to be included in RHEL4 U2.
The list is:
[PATCH] Kprobes: Allow/deny probes on int3/breakpoint instruction?
This patch is required. It has been integrated upstream.
[PATCH] Kprobes: Incorrect handling of probes on ret/lret instruction
This patch is upstream. Needed in RHEL.
[PATCH] Kprobes: Oops! in unregister_kprobe()
Patch upstream - needs to go into RHEL.
[RFC] [PATCH] Multiple kprobes at an address
Patch upstream. Needed in RHEL
[RCF][PATCH] kprobes: function-return probes
Awaiting community comments. Feature needed in RHEL. Also, this
feature is arch specific.
There are other changes that are not captured as part of the list since
they are still in the works. We are working on getting these done ASAP:
- Reentrant probe handling
- Kprobe scalability changes
- kprobe-jprobe coexistance
Also relayfs patches are needed (don't have the details on those yet)
Relayfs patch needing backport is this one:
[PATCH 2.6.12-rc1-mm2] relayfs: properly handle oversized events
you seem to be under the impression that relayfs is present in RHEL4.
It isn't. It isn't even merged in current upstream.
relayfs is one of two modules we will need (the other is stp_control) to build
for each kernel. Both are checked into the systemtap cvs. I have applied the
above patch to relayfs.
Patches have been submitted to rhkernel-list.
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.