From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Ray Fucillo <fucillo@intersystems.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: process creation time increases linearly with shmem
Date: Thu, 25 Aug 2005 10:14:35 +1000 [thread overview]
Message-ID: <430D0D6B.100@yahoo.com.au> (raw)
In-Reply-To: <430CBFD1.7020101@intersystems.com>
Ray Fucillo wrote:
> I am seeing process creation time increase linearly with the size of the
> shared memory segment that the parent touches. The attached forktest.c
> is a very simple user program that illustrates this behavior, which I
> have tested on various kernel versions from 2.4 through 2.6. Is this a
> known issue, and is it solvable?
>
fork() can be changed so as not to set up page tables for
MAP_SHARED mappings. I think that has other tradeoffs like
initially causing several unavoidable faults reading
libraries and program text.
What kind of application are you using?
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
next prev parent reply other threads:[~2005-08-25 0:14 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-24 18:43 process creation time increases linearly with shmem Ray Fucillo
2005-08-25 0:14 ` Nick Piggin [this message]
2005-08-25 13:07 ` Ray Fucillo
2005-08-25 13:13 ` Andi Kleen
2005-08-25 14:28 ` Nick Piggin
2005-08-25 17:31 ` Rik van Riel
2005-08-26 1:26 ` Nick Piggin
2005-08-26 1:50 ` Rik van Riel
2005-08-26 3:56 ` Linus Torvalds
2005-08-26 11:49 ` Hugh Dickins
2005-08-26 14:26 ` Nick Piggin
2005-08-26 17:00 ` Ray Fucillo
2005-08-26 17:53 ` Rik van Riel
2005-08-26 18:20 ` Ross Biro
2005-08-26 18:56 ` Hugh Dickins
[not found] ` <8783be660508260915524e2b1e@mail.gmail.com>
2005-08-26 16:38 ` Hugh Dickins
2005-08-26 16:43 ` Ross Biro
2005-08-26 18:07 ` Linus Torvalds
2005-08-26 18:41 ` Hugh Dickins
2005-08-26 22:55 ` Linus Torvalds
2005-08-26 23:10 ` Rik van Riel
2005-08-26 23:23 ` Linus Torvalds
2005-08-27 15:05 ` Nick Piggin
2005-08-28 4:26 ` Hugh Dickins
2005-08-28 6:49 ` Nick Piggin
2005-08-29 23:33 ` Ray Fucillo
2005-08-30 0:29 ` Nick Piggin
2005-08-30 1:03 ` Linus Torvalds
2005-08-30 0:34 ` Linus Torvalds
-- strict thread matches above, loose matches on Subject: below --
2005-08-25 14:05 Parag Warudkar
2005-08-25 14:22 ` Andi Kleen
2005-08-25 14:35 ` Nick Piggin
2005-08-25 14:47 ` Parag Warudkar
2005-08-25 15:56 ` Andi Kleen
2005-12-14 14:07 Brice Oliver
2005-12-14 16:21 ` Hugh Dickins
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