Subject: Re: [linux-audio-dev] kernel 2.6.6 just out
From: eviltwin69_AT_cableone.net
Date: Mon May 10 2004 - 19:05:26 EEST
Jan
On Mon, 10 May 2004 16:50 , Robert Jonsson <robert.jonsson_AT_dataductus.se> sent:
>Hi,
>
>As a service to all readers, here's an excerpt of the Changelog concerning
>latency: ;)
>
>akpm_AT_osdl.org>
> [PATCH] Add mpage_writepages() scheduling point
>
> From: Jens Axboe axboe_AT_suse.de>
>
> Takashi did some nice latency testing of the current kernel (with -mm
> writeback changes), and the biggest offender in general core is
> mpage_writepages().
>
>akpm_AT_osdl.org>
> [PATCH] ia32: 4Kb stacks (and irqstacks) patch
>
> From: Arjan van de Ven arjanv_AT_redhat.com>
>
> Below is a patch to enable 4Kb stacks for x86. The goal of this is to
>
> 1) Reduce footprint per thread so that systems can run many more threads
> (for the java people)
>
> 2) Reduce the pressure on the VM for order > 0 allocations. We see real life
> workloads (granted with 2.4 but the fundamental fragmentation issue isn't
> solved in 2.6 and isn't solvable in theory) where this can be a problem.
> In addition order > 0 allocations can make the VM "stutter" and give more
> latency due to having to do much much more work trying to defragment
>
>akpm_AT_osdl.org>
> [PATCH] reiserfs: scheduling latency improvements
>
>akpm_AT_osdl.org>
> [PATCH] unmap_vmas latency improvement
>
> unmap_vmas() will cause scheduling latency when tearing down really big vmas
> on !CONFIG_PREEMPT. That's a bit unkind to the non-preempt case, so let's do
> a cond_resched() after zapping 1024 pages.
>
>
>So... humbly asking, is it time yet to make the switch? :-)
>
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