From: "David S. Miller" <davem@redhat.com>
To: Larry McVoy <lm@bitmover.com>
Cc: lm@bitmover.com, roland@topspin.com, alan@storlinksemi.com,
linux-kernel@vger.kernel.org, linux-net@vger.kernel.org,
netdev@oss.sgi.com
Subject: Re: TCP IP Offloading Interface
Date: Sun, 13 Jul 2003 17:24:14 -0700 [thread overview]
Message-ID: <20030713172414.5c888094.davem@redhat.com> (raw)
In-Reply-To: <20030714002200.GA24697@work.bitmover.com>
On Sun, 13 Jul 2003 17:22:00 -0700
Larry McVoy <lm@bitmover.com> wrote:
> Hey, maybe it isn't, but could you please quantify the cost of the VM
> operations? How hard is that?
Ok.
So the page is in a non-uptodate state, NFS would have it locked,
and anyone else trying to get at it would sleep.
This page we have currently is "dummy" in that it is only a place
holder in case we don't get a full page from the networking.
We have all the infrastructure to do everything up to this point.
Next, if the networking gave us a full page, we'd "replace"
the dummy page with this one, which would involve:
1) delete the dummy page from the lookup, insert the networking's
page
2) arrange so that all sleepers on the dummy page will do a relookup
and find the new page
And when we're done with the operation we wake everyone up.
I can't see any part of this turning out to be expensive.
next prev parent reply other threads:[~2003-07-14 0:24 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <ODEIIOAOPGGCDIKEOPILCEMBCMAA.alan@storlinksemi.com>
2003-07-13 7:48 ` TCP IP Offloading Interface David S. Miller
2003-07-13 16:22 ` Roland Dreier
2003-07-13 16:31 ` Alan Cox
2003-07-13 16:49 ` Jeff Garzik
2003-07-13 16:58 ` Jeff Garzik
2003-07-13 23:02 ` David S. Miller
2003-07-13 23:35 ` Larry McVoy
2003-07-13 23:40 ` David S. Miller
2003-07-13 23:54 ` Larry McVoy
2003-07-13 23:53 ` David S. Miller
2003-07-14 0:22 ` Larry McVoy
2003-07-14 0:24 ` David S. Miller [this message]
2003-07-14 0:48 ` Larry McVoy
2003-07-14 0:46 ` Valdis.Kletnieks
2003-07-14 0:42 ` David S. Miller
2003-07-16 2:46 ` Matt Porter
2003-07-14 0:20 ` Roland Dreier
2003-07-14 0:28 ` David S. Miller
2003-07-16 2:37 ` Matt Porter
2003-07-15 5:42 Jordi Ros
2003-07-15 5:51 ` David S. Miller
2003-07-16 5:02 ` jamal
2003-07-16 1:51 ` Roland Dreier
2003-07-15 19:01 ` Ralph Doncaster
2003-07-15 19:36 ` Chris Dukes
-- strict thread matches above, loose matches on Subject: below --
2003-07-15 16:28 David griego
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