* [Bug runtime/11602] New: compress unwind data
@ 2010-05-17 14:48 fche at redhat dot com
2010-05-19 16:48 ` [Bug runtime/11602] " fche at redhat dot com
2010-05-19 16:48 ` fche at redhat dot com
0 siblings, 2 replies; 5+ messages in thread
From: fche at redhat dot com @ 2010-05-17 14:48 UTC (permalink / raw)
To: systemtap
16MB of maximum module size can be exceeded if one attempts to upload
unwind/symbol data for huge userspace libraries like libxul.so. It
turns out that .eh_frame and .debug_frame are highly compressible
(gzip shows 80%). We could put the compressed form into the .ko
and decompress on demand into the relatively more voluminous kernel
heap.
--
Summary: compress unwind data
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: runtime
AssignedTo: systemtap at sources dot redhat dot com
ReportedBy: fche at redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=11602
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* [Bug runtime/11602] compress unwind data
2010-05-17 14:48 [Bug runtime/11602] New: compress unwind data fche at redhat dot com
@ 2010-05-19 16:48 ` fche at redhat dot com
2010-05-19 16:48 ` fche at redhat dot com
1 sibling, 0 replies; 5+ messages in thread
From: fche at redhat dot com @ 2010-05-19 16:48 UTC (permalink / raw)
To: systemtap
------- Additional Comments From fche at redhat dot com 2010-05-19 14:11 -------
Note that we would not want to decompress the stuff until / unless the
respective stp_module is actually required (=> having section addresses
assigned by run-time detection of presence).
--
http://sourceware.org/bugzilla/show_bug.cgi?id=11602
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* [Bug runtime/11602] compress unwind data
2010-05-17 14:48 [Bug runtime/11602] New: compress unwind data fche at redhat dot com
2010-05-19 16:48 ` [Bug runtime/11602] " fche at redhat dot com
@ 2010-05-19 16:48 ` fche at redhat dot com
1 sibling, 0 replies; 5+ messages in thread
From: fche at redhat dot com @ 2010-05-19 16:48 UTC (permalink / raw)
To: systemtap
--
What |Removed |Added
----------------------------------------------------------------------------
OtherBugsDependingO| |11609
nThis| |
http://sourceware.org/bugzilla/show_bug.cgi?id=11602
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* [Bug runtime/11602] compress unwind data
[not found] <bug-11602-6586@http.sourceware.org/bugzilla/>
2011-10-19 1:01 ` fche at redhat dot com
@ 2015-01-22 19:53 ` ajakop at redhat dot com
1 sibling, 0 replies; 5+ messages in thread
From: ajakop at redhat dot com @ 2015-01-22 19:53 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=11602
Abe Jakop <ajakop at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |ajakop at redhat dot com
Resolution|--- |WONTFIX
--- Comment #3 from Abe Jakop <ajakop at redhat dot com> ---
The 64MB maximum module size limit was removed in kernel 3.4. For fedoras 18+
and RHEL7+, compressing the data (or other debug_info data) is not necessary.
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* [Bug runtime/11602] compress unwind data
[not found] <bug-11602-6586@http.sourceware.org/bugzilla/>
@ 2011-10-19 1:01 ` fche at redhat dot com
2015-01-22 19:53 ` ajakop at redhat dot com
1 sibling, 0 replies; 5+ messages in thread
From: fche at redhat dot com @ 2011-10-19 1:01 UTC (permalink / raw)
To: systemtap
http://sourceware.org/bugzilla/show_bug.cgi?id=11602
--- Comment #2 from Frank Ch. Eigler <fche at redhat dot com> 2011-10-19 01:00:36 UTC ---
Or it could remain specially compressed, as in
http://code.google.com/p/idzip/
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2010-05-17 14:48 [Bug runtime/11602] New: compress unwind data fche at redhat dot com
2010-05-19 16:48 ` [Bug runtime/11602] " fche at redhat dot com
2010-05-19 16:48 ` fche at redhat dot com
[not found] <bug-11602-6586@http.sourceware.org/bugzilla/>
2011-10-19 1:01 ` fche at redhat dot com
2015-01-22 19:53 ` ajakop at redhat dot com
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