lkml.org 
[lkml]   [2002]   [Jan]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [2.4.17/18pre] VM and swap - it's really unusable
On Mon, 21 Jan 2002 yodaiken@fsmlabs.com wrote:

> I have not seen that argued - certainly I have not argued it myself.
> My argument is:
> It makes the kernel _much_ more complex
It modifies a tiny fraction of a percent of the kernel, which is
currently simplistic rather than simple. Nearly everyone who looks at it
makes some improvement, be it preempt, low latency, etc.

> It has known costs e.g. by making the lockless
> per-processor caching more difficult if not impossible
How much slowdown did you measure when you tested the effect of that?

> It seems to lead to a requirement for inheritance
To the limited extent that I agree, so what?

> It has no demonstrated benefits.
You have that backward. There are many people who say they can see a
benefit, and no one has shown either a quantified bad impact or a single
user account which said it was worse. And I bet you looked, didn't you?

I believe that a system will run better for a single user, and better
for a server with high interrupt rates, like DNS or web servers, where
many threads may be blocked on i/o, but there is significant CPU load as
well.

--
bill davidsen <davidsen@tmr.com>
CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:15    [W:0.422 / U:0.068 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site