From: Mike Galbraith <mikeg@wen-online.de>
To: Bulent Abali <abali@us.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
Derek Glidden <dglidden@illusionary.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: Break 2.4 VM in five easy steps
Date: Thu, 7 Jun 2001 17:38:39 +0200 (CEST) [thread overview]
Message-ID: <Pine.LNX.4.33.0106071641020.332-100000@mikeg.weiden.de> (raw)
In-Reply-To: <OF75B67BC7.4C70DAF5-ON85256A64.004C4AD1@pok.ibm.com>
On Thu, 7 Jun 2001, Bulent Abali wrote:
> I happened to saw this one with debugger attached serial port.
> The system was alive. I think I was watching the free page count and
> it was decreasing very slowly may be couple pages per second. Bigger
> the swap usage longer it takes to do swapoff. For example, if I had
> 1GB in the swap space then it would take may be an half hour to shutdown...
I took a ~300ms ktrace snapshot of the no IO spot with 2.4.4.ikd..
% TOTAL TOTAL USECS AVG/CALL NCALLS
0.0693% 208.54 0.40 517 c012d4b9 __free_pages
0.0755% 227.34 1.01 224 c012cb67 __free_pages_ok
...
34.7195% 104515.15 0.95 110049 c012de73 unuse_vma
53.3435% 160578.37 303.55 529 c012dd38 __swap_free
Total entries: 131051 Total usecs: 301026.93 Idle: 0.00%
Andrew Morton could be right about that loop not being wonderful.
-Mike
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next prev parent reply other threads:[~2001-06-07 15:38 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-07 14:22 Bulent Abali
2001-06-07 15:38 ` Mike Galbraith [this message]
[not found] <3B1E4CD0.D16F58A8@illusionary.com>
[not found] ` <3b204fe5.4014698@mail.mbay.net>
[not found] ` <3B1E5316.F4B10172@illusionary.com>
[not found] ` <m1wv6p5uqp.fsf@frodo.biederman.org>
[not found] ` <3B1E7ABA.EECCBFE0@illusionary.com>
2001-06-06 18:52 ` Eric W. Biederman
2001-06-06 19:06 ` Mike Galbraith
2001-06-06 19:28 ` Eric W. Biederman
2001-06-07 4:32 ` Mike Galbraith
2001-06-07 6:38 ` Eric W. Biederman
2001-06-07 7:28 ` Mike Galbraith
2001-06-07 7:59 ` Eric W. Biederman
2001-06-07 8:15 ` Mike Galbraith
2001-06-07 17:10 ` Marcelo Tosatti
2001-06-06 19:28 ` Derek Glidden
2001-06-09 7:55 ` Rik van Riel
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