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Bug 435544 - inefficient log parser: kerneloops uses lots of CPU time with large log files
inefficient log parser: kerneloops uses lots of CPU time with large log files
Product: Fedora
Classification: Fedora
Component: kerneloops (Show other bugs)
All Linux
low Severity low
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Assigned To: Kernel Maintainer List
Fedora Extras Quality Assurance
: 436127 (view as bug list)
Depends On:
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Reported: 2008-03-01 07:28 EST by Pierre Ossman
Modified: 2011-12-14 02:34 EST (History)
1 user (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2008-03-17 13:24:55 EDT
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RHEL 7.3 requirements from Atomic Host:

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Description Pierre Ossman 2008-03-01 07:28:15 EST
The parser in kerneloops is annoyingly ineffecient. When messages starts to grow
a bit (mine is around 6 MB), kerneloops eats 100% CPU for a few minutes on a
brand new CPU.

I gdb:d the thing a bit, and it is spending all of its time in strstr(), which
is why I believe it's the log file parsing that's the culprit. Is it doing a
strstr() on the entire buffer for each thing it is looking for? :)
Comment 1 Chuck Ebbert 2008-03-05 17:39:36 EST
*** Bug 436127 has been marked as a duplicate of this bug. ***
Comment 2 Chuck Ebbert 2008-03-17 13:24:55 EDT
Fixed in 0.10-7

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