Subject: [linux-audio-dev] Fwd: Updated Linux 2.4.9/2.4.10 kernel preemption patches
From: Roger Larsson (roger.larsson_AT_norran.net)
Date: Fri Aug 31 2001 - 03:27:31 EEST
Hi all,
A little note from the linux-kernel list.
See
http://kpreempt.sourceforge.net/
for description.
This is the low-latency work that is most likely
to bee included in linux-2.5
(Note the spikes some part of the code is holding
a spin-lock for too long... But the nice part is
that - to get good SMP performance they will have
to go!)
/RogerL
---------- Forwarded Message ----------
Subject: Updated Linux 2.4.9/2.4.10 kernel preemption patches
Date: 29 Aug 2001 01:35:26 -0400
From: Robert Love <rml_AT_tech9.net>
To: linux-kernel_AT_vger.kernel.org
Cc: cliff_AT_oisec.net, jjs_AT_toyota.com, andy_AT_spylog.ru, nigel_AT_nrg.org
Updated patches are at:
http://tech9.net/rml/linux/patch-rml-2.4.9-ac3-preempt-kernel-1
and,
http://tech9.net/rml/linux/patch-rml-2.4.10-pre2-preempt-kernel-1
for kernels 2.4.9-ac3 and 2.4.10-pre2.
These are updates of Nigel Gamble's kernel preemption patches for recent
kernels. See http://kpreempt.sourceforge.net/. These patches create a
configure option to enable a preemptible kernel using SMP lock points.
A preemptible kernel will yield control of execution to higher priority
processes as needed. Ie, the process timeslice now applies to kernel
space.
Changes since my previous patch:
* update for 2.4.9-ac3 and 2.4.10-pre2
* fix the compile bug (yay!) -- the linking dependency of dec_and_lock
requires CONFIG_HAVE_DEC_LOCK which SMP sets in recent kernels. now
CONFIG_PREEMPT sets, too
So, yes, this should fix the kernel compile buggy. At least it did for
me, after I was finally able to reproduce the problem.
Enjoy and please comment, test, and benchmark.
-- Robert M. Love rml at ufl.edu rml at tech9.net- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo_AT_vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
-------------------------------------------------------
-- Roger Larsson Skellefteå Sweden
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