From: Arjan van de Ven <arjan@infradead.org>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Andrew Morton <akpm@osdl.org>, linux-mm@kvack.org
Subject: Re: follow_page()
Date: Thu, 11 Nov 2004 13:16:27 +0100 [thread overview]
Message-ID: <1100175387.4387.1.camel@laptop.fenrus.org> (raw)
In-Reply-To: <419353D5.2080902@yahoo.com.au>
> > so in the race case you get the hit of those 4000 cycles... still optimizes the non-race case
> > (so I'd agree that nothing should depend on this function dirtying it; it's a pre-dirty that's an
> > optimisation)
> >
>
> Only it doesn't mark the pte dirty, does it?
sounds like someone subsequently "optimized" it...
predirtying the pte is still worth it imo....
but when we do that we better put a big fat comment there.
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next prev parent reply other threads:[~2004-11-11 12:16 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-11 10:40 follow_page() Andrew Morton
2004-11-11 10:56 ` follow_page() Arjan van de Ven
2004-11-11 11:06 ` follow_page() Andrew Morton
2004-11-11 11:10 ` follow_page() Arjan van de Ven
2004-11-11 11:58 ` follow_page() Nick Piggin
2004-11-11 12:11 ` follow_page() Andrew Morton
2004-11-11 12:20 ` follow_page() Nick Piggin
2004-11-11 12:16 ` Arjan van de Ven [this message]
2004-11-11 12:27 ` follow_page() Nick Piggin
2004-11-11 12:46 ` follow_page() Arjan van de Ven
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