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Date: Fri, 20 Aug 2004 15:30:31 +0200
From: Ingo Molnar <mingo@elte.hu>
To: linux-kernel@vger.kernel.org
Cc: Thomas Charbonnel <thomas@undata.org>,
       Florian Schmidt <mista.tapas@gmx.net>,
       Felipe Alfaro Solana <felipe_alfaro@linuxmail.org>,
       Lee Revell <rlrevell@joe-job.com>, Mark_H_Johnson@raytheon.com
Subject: [patch] voluntary-preempt-2.6.8.1-P5
Message-ID: <20040820133031.GA13105@elte.hu>
References: <1092627691.867.150.camel@krustophenia.net> <20040816034618.GA13063@elte.hu> <1092628493.810.3.camel@krustophenia.net> <20040816040515.GA13665@elte.hu> <1092654819.5057.18.camel@localhost> <20040816113131.GA30527@elte.hu> <20040816120933.GA4211@elte.hu> <1092716644.876.1.camel@krustophenia.net> <20040817080512.GA1649@elte.hu> <20040819073247.GA1798@elte.hu>
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i've uploaded the -P5 patch:

  http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.8.1-P5

Changes since -P4:

 - increase PERCPU_ENOUGH_ROOM to avoid percpu overflow on SMP.
   (Mark H Johnson)

 - reduce ZAP_BLOCK_SIZE to 16 when vp != 0. This pushes the exit
   latency down to below 100 usecs on Lee Revell's box.

 - added a preempt_count field to /proc/latency_trace. This makes it
   easier to spot IRQ contexts and generally it gives a nice overview of
   how the preemption depth changes. It should also help us debug
   those 900usec weirdnesses related to cpu_idle. (if they still occur)

 - made the tcp packet-queue collapsing dependent on VOLUNTARY_PREEMPT.

 - fixed 10-20 msec latencies triggered by 'netstat', which occur when
   there are lots of sockets on a box.

 - rediffed against 2.6.8.1 for the patch to apply without fuzz

	Ingo