From: Andrew Morton <akpm@osdl.org>
To: linux-ia64@vger.kernel.org
Subject: Fw: [Bugme-new] [Bug 2885] New: realtime process can't preempt low
Date: Mon, 14 Jun 2004 07:29:31 +0000 [thread overview]
Message-ID: <20040614002931.00b846a4.akpm@osdl.org> (raw)
This would appear to indicate that CONFIG_PREEMPT isn't working
correctly on ia64.
Begin forwarded message:
Date: Mon, 14 Jun 2004 00:25:22 -0700
From: bugme-daemon@osdl.org
To: bugme-new@lists.osdl.org
Subject: [Bugme-new] [Bug 2885] New: realtime process can't preempt low priority process in kernel
http://bugme.osdl.org/show_bug.cgi?id(85
Summary: realtime process can't preempt low priority process in
kernel
Kernel Version: 2.6.5
Status: NEW
Severity: normal
Owner: rml@tech9.net
Submitter: hong.liu@intel.com
CC: yi.zhu@intel.com
Distribution:
Hardware Environment: 4 Itanium2 1.4G processors-tiger4
Software Environment: gcc-3.3.3
Problem Description:
After turning on the CONFIG_PREEMPT option and recompile the kernel source
code, the realtime process still can't preempt the low priority process which
is doing busy loop in kernel.
The test case does pass both on a pentium 4 PC and a Xeon 2.4G smp machine.
Steps to reproduce:
in the directory of the test case,
#make
#insmod ./modules/hog.ko
#mknod /dev/hog c 126 0
#./do_hog
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next reply other threads:[~2004-06-14 7:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-14 7:29 Andrew Morton [this message]
2004-06-21 23:57 ` Fw: [Bugme-new] [Bug 2885] New: realtime process can't preempt low priority process in kernel Peter Chubb
2004-06-24 1:48 ` Zhu, Yi
2004-06-29 18:42 ` David Mosberger
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