Date: Sun, 23 Apr 2006 23:43:52 -0700 From: John-Mark Gurney <gurney_j@resnet.uoregon.edu> To: Kirk McKusick <mckusick@McKusick.COM> Cc: arch@freebsd.org Subject: Re: Linus Torvalds on FreeBSD's Use of Copy-on-write Message-ID: <20060424064352.GA728@funkthat.com> In-Reply-To: <200604240633.k3O6XUJ0042841@chez.mckusick.com> References: <200604240633.k3O6XUJ0042841@chez.mckusick.com>
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Kirk McKusick wrote this message on Sun, Apr 23, 2006 at 23:33 -0700:
> Linus explained that while this may look good on specific benchmarks,
> it actually introduces extra overhead, "the thing is, the cost of
Has he benchmarked this to prove his point? And has he done it over
realworld work loads, like Apache or another "standard" program instead
of a microbenchmark designed especially to make COW look bad?
As w/ all theories, w/o numbers, they are only theories till backed up
w/ benchmarks.
This isn't suppose to defend COW, but it is designed to ensure that
people don't stop exploring just because someone says something...
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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