Re: [Bugme-new] [Bug 8100] New: dynticks makes ksoftirqd1 use unreasonable amount of cpu time

On Wed, 28 Feb 2007 09:34:10 -0800
bugme-daemon@xxxxxxxxxxxxxxxxxxx wrote:

http://bugzilla.kernel.org/show_bug.cgi?id=8100

Summary: dynticks makes ksoftirqd1 use unreasonable amount of cpu
time
Kernel Version: 2.6.21-rc2
Status: NEW
Severity: low
Owner: johnstul@xxxxxxxxxx
Submitter: jkarlson@xxxxxxxxx


Most recent kernel where this bug did *NOT* occur:
any kernel without dynticks

Distribution:
Debian etch with linux-2.6.21-rc{2,1}

Hardware Environment:
Macbook core2 with bios emulation

Software Environment:
The problem is obvious when listening to shoutcast stream with kmplayer and
artsd via wi-fi with wpa (wpa_supplicant)

Problem Description:
ksoftirqd1 uses ~30% cpu-time (by top) no other symptoms, while
without dyntikcs cpu-load in similar circumstances is negligible.
This might be a dynticks feature rather than bug.

Steps to reproduce:
Just watch the top, if the bug is reproducible, probably just booting should
suffice.

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