From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Rik van Riel <riel@redhat.com>, Linus Torvalds <torvalds@osdl.org>
Cc: Ray Fucillo <fucillo@intersystems.com>,
linux-kernel@vger.kernel.org, Hugh Dickins <hugh@veritas.com>
Subject: Re: process creation time increases linearly with shmem
Date: Fri, 26 Aug 2005 11:26:44 +1000 [thread overview]
Message-ID: <430E6FD4.9060102@yahoo.com.au> (raw)
In-Reply-To: <Pine.LNX.4.63.0508251331040.25774@cuia.boston.redhat.com>
Rik van Riel wrote:
> On Thu, 25 Aug 2005, Nick Piggin wrote:
>
>
>>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.
>
>
> Actually, libraries and program text are usually mapped
> MAP_PRIVATE, so those would still be copied.
>
Yep, that seems to be the case here.
> Skipping MAP_SHARED in fork() sounds like a good idea to me...
>
Indeed. Linus, can you remember why we haven't done this before?
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
next prev parent reply other threads:[~2005-08-26 1:26 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
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 [this message]
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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