From: Dan Malek <ppc6dev@digitaldans.com>
To: John Linn <John.Linn@xilinx.com>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: Flushing data cache on PPC405 in Linux
Date: Thu, 24 Feb 2011 12:15:03 -0800 [thread overview]
Message-ID: <D4328E94-C711-4EE3-9651-E69B359B91B6@digitaldans.com> (raw)
In-Reply-To: <119fc163-ae81-4492-955a-94d1234ab6d9@VA3EHSMHS021.ehs.local>
On Feb 24, 2011, at 6:43 AM, John Linn wrote:
> It seems like this also depends on that fact that __GFP_COLD will
> work,
> otherwise some of the data could
> already be in the cache such that you're not guaranteed to get
> everything out of the cache.
I wouldn't count on GFP_COLD as a guarantee the data isn't
in the cache. It's likely, but the generic MM functions just
ensures they are old pages, based on an indication from the
caller that freed the pages.
-- Dan
prev parent reply other threads:[~2011-02-24 20:15 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-24 1:04 Flushing data cache on PPC405 in Linux John Linn
2011-02-24 3:38 ` Dan Malek
2011-02-24 14:15 ` John Linn
2011-02-24 14:43 ` John Linn
2011-02-24 20:15 ` Dan Malek [this message]
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