From: Dave Hansen <haveblue@us.ibm.com>
To: Kirill Korotaev <dev@openvz.org>
Cc: serue@us.ibm.com, arjan@infradead.org, frankeh@watson.ibm.com,
clg@fr.ibm.com, mrmacman_g4@mac.com, alan@lxorguk.ukuu.org.uk,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
devel@openvz.org
Subject: Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case
Date: Thu, 02 Feb 2006 09:05:51 -0800 [thread overview]
Message-ID: <1138899951.29030.30.camel@localhost.localdomain> (raw)
In-Reply-To: <43E23398.7090608@openvz.org>
On Thu, 2006-02-02 at 19:30 +0300, Kirill Korotaev wrote:
> This is the main patch which contains all vpid-to-pid conversions
> and auxilliary stuff. Virtual pids are distinguished from real ones
> by the VPID_BIT bit set. Conversion from vpid to pid and vice versa
> is performed in two ways: fast way, when vpid and it's according pid
> differ only in VPID_BIT bit set ("linear" case), and more complex way,
> when pid may correspond to any vpid ("sparse" case) - in this case we
> use a hash-table based mapping.
This is an interesting approach. Could you elaborate a bit on on why
you need the two different approaches? What conditions cause the switch
to the sparse approach?
Also, if you could separate those two approaches out into two different
patches, it would be much easier to get a grasp about what's going on.
One of them is just an optimization, right?
Did you happen to catch Linus's mail about his preferred approach?
http://marc.theaimsgroup.com/?l=linux-kernel&m=113874154731279&w=2
-- Dave
next prev parent reply other threads:[~2006-02-02 17:06 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-02 15:54 [RFC][PATCH] VPIDs: Virtualization of PIDs (OpenVZ approach) Kirill Korotaev
2006-02-02 16:16 ` [RFC][PATCH 1/7] VPIDs: add VPID config option Kirill Korotaev
2006-02-02 16:21 ` [RFC][PATCH 2/7] VPIDs: pid/vpid conversions Kirill Korotaev
2006-02-08 20:29 ` Eric W. Biederman
2006-02-08 23:53 ` Alexey Kuznetsov
2006-02-09 0:37 ` Eric W. Biederman
2006-02-09 1:11 ` Alexey Kuznetsov
2006-02-09 1:36 ` Eric W. Biederman
2006-02-09 2:51 ` Serge E. Hallyn
2006-02-09 9:55 ` Alexey Kuznetsov
2006-02-09 19:22 ` Eric W. Biederman
2006-02-20 14:57 ` Kirill Korotaev
2006-02-20 16:56 ` Herbert Poetzl
2006-02-21 16:19 ` Kirill Korotaev
2006-02-21 23:17 ` Herbert Poetzl
2006-02-02 16:24 ` [RFC][PATCH 3/7] VPIDs: fork modifications Kirill Korotaev
2006-02-02 20:08 ` Cedric Le Goater
2006-02-02 16:26 ` [RFC][PATCH 4/7] VPIDs: vpid macros in non-VPID case Kirill Korotaev
2006-02-02 16:30 ` [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case Kirill Korotaev
2006-02-02 17:05 ` Dave Hansen [this message]
2006-02-02 19:29 ` Serge E. Hallyn
2006-02-03 10:52 ` Alexey Kuznetsov
2006-02-03 12:48 ` Cedric Le Goater
2006-02-03 14:02 ` Alexey Kuznetsov
2006-02-03 16:25 ` Dave Hansen
2006-02-06 11:24 ` Alexey Kuznetsov
2006-02-03 17:05 ` Cedric Le Goater
2006-02-06 9:48 ` Alexey Kuznetsov
2006-02-06 14:51 ` Serge E. Hallyn
2006-02-06 15:51 ` Alexey Kuznetsov
2006-02-06 16:24 ` Serge E. Hallyn
2006-02-07 9:46 ` Cedric Le Goater
2006-02-07 11:44 ` Kirill Korotaev
2006-02-07 12:59 ` Cedric Le Goater
2006-02-07 9:15 ` Cedric Le Goater
2006-02-03 14:05 ` Kirill Korotaev
2006-02-03 15:40 ` Cedric Le Goater
2006-02-03 16:28 ` Kirill Korotaev
2006-02-02 16:31 ` [RFC][PATCH 6/7] VPIDs: small proc VPID export Kirill Korotaev
2006-02-02 16:33 ` [RFC][PATCH 7/7] VPIDs: required VPS interface for VPIDs Kirill Korotaev
2006-02-03 3:01 ` [RFC][PATCH] VPIDs: Virtualization of PIDs (OpenVZ approach) Herbert Poetzl
2006-02-03 10:30 ` Kirill Korotaev
2006-02-03 12:45 ` Alexey Kuznetsov
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