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From: linux@horizon.com
To: git@vger.kernel.org
Subject: Re: cloning the kernel - why long time in "Resolving 313037 deltas"
Date: 21 Dec 2006 03:41:42 -0500	[thread overview]
Message-ID: <20061221084142.14347.qmail@science.horizon.com> (raw)

Remember, OS X is FreeBSD somehow layered on top of Mach 3.
In particular, it calls though to Mach for virtual memory.

And Mach is at its heart an academic design aiming for flexibility in
its VM system rather tha performance.  In particular, its provisions
for user-space pagers.

I can easily believe that its mmap is 10x slower that Linux.  60x is.. a
bit extreme.  A Darwin kernel hacker should probably get a nudge about it.

             reply	other threads:[~2006-12-21  8:48 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-12-21  8:41 linux [this message]
     [not found] <86y7p57y05.fsf@blue.stonehenge.com>
     [not found] ` <Pine.LNX.4.64.0612181251020.3479@woody.osdl.org>
     [not found]   ` <86r6uw9azn.fsf@blue.stonehenge.com>
     [not found]     ` <Pine.LNX.4.64.0612181625140.18171@xanadu.home>
2006-12-18 22:01       ` cloning the kernel - why long time in "Resolving 313037 deltas" Randal L. Schwartz
2006-12-18 22:09         ` Nicolas Pitre
2006-12-18 22:21           ` Randal L. Schwartz
2006-12-18 22:50             ` Nicolas Pitre
2006-12-18 22:22         ` Linus Torvalds
2006-12-18 22:26           ` Randal L. Schwartz
2006-12-18 23:02             ` Martin Langhoff
2006-12-22  1:44               ` Kyle Moffett
2006-12-22  1:56                 ` Shawn Pearce
2006-12-22  8:04                 ` Marco Roeland
2007-01-03 13:55               ` Andreas Ericsson
2006-12-18 23:28             ` Linus Torvalds
2006-12-19  0:13               ` Nicolas Pitre
2006-12-19  5:11                 ` Theodore Tso
2006-12-19  6:39                   ` Shawn Pearce
2006-12-19  6:51                     ` Linus Torvalds
2006-12-19  7:26                       ` Shawn Pearce
2006-12-19  7:52                         ` Marco Roeland
2006-12-19  7:58                           ` Shawn Pearce
2006-12-19  8:32                       ` Shawn Pearce
2006-12-19  8:40                         ` Marco Roeland
2006-12-19  8:49                           ` Shawn Pearce
2006-12-19  9:13                             ` Marco Roeland
2006-12-19 20:28                               ` Alex Riesen
2006-12-21 20:35                                 ` Juergen Ruehle
2006-12-19 16:19                     ` Theodore Tso
2006-12-19 16:57                       ` Linus Torvalds
2006-12-20  1:54                         ` Shawn Pearce
2006-12-20  1:58                       ` Shawn Pearce
2006-12-19  6:47                   ` Linus Torvalds
2006-12-19  8:32                     ` Johannes Schindelin
2006-12-19  9:10                       ` Junio C Hamano
2006-12-19  9:47                         ` Jeff King
2006-12-19 10:24                         ` Andy Whitcroft

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