From: Arjan van de Ven <arjanv@redhat.com>
To: Joe Thornber <thornber@fib011235813.fsnet.co.uk>
Cc: Arjan van de Ven <arjanv@redhat.com>,
lvm-devel@sistina.com, Jim McDonald <Jim@mcdee.net>,
Andreas Dilger <adilger@turbolabs.com>,
linux-lvm@sistina.com, linux-kernel@vger.kernel.org,
evms-devel@lists.sourceforge.net
Subject: [linux-lvm] Re: [ANNOUNCE] LVM reimplementation ready for beta testing
Date: Fri Feb 1 04:13:01 2002 [thread overview]
Message-ID: <20020201051251.B10893@devserv.devel.redhat.com> (raw)
In-Reply-To: <20020131130913.A8997@fib011235813.fsnet.co.uk>; from thornber@fib011235813.fsnet.co.uk on Thu, Jan 31, 2002 at 01:09:13PM +0000
On Thu, Jan 31, 2002 at 01:09:13PM +0000, Joe Thornber wrote:
>
> Now our hero decides to PV move PV2 to PV4:
>
> 1. Suspend our LV (254:3), this starts queueing all io, and flushes
> all pending io.
But "flushes all pending io" is *far* from trivial. there's no current
kernel functionality for this, so you'll have to do "weird shit" that will
break easy and often.
Also "suspending" is rather dangerous because it can deadlock the machine
(think about the VM needing to write back dirty data on this LV in order to
make memory available for your move)...
Greetings,
Arjan van de Ven
WARNING: multiple messages have this Message-ID (diff)
From: Arjan van de Ven <arjanv@redhat.com>
To: Joe Thornber <thornber@fib011235813.fsnet.co.uk>
Cc: Arjan van de Ven <arjanv@redhat.com>,
lvm-devel@sistina.com, Jim McDonald <Jim@mcdee.net>,
Andreas Dilger <adilger@turbolabs.com>,
linux-lvm@sistina.com, linux-kernel@vger.kernel.org,
evms-devel@lists.sourceforge.net
Subject: Re: [ANNOUNCE] LVM reimplementation ready for beta testing
Date: Fri, 1 Feb 2002 05:12:51 -0500 [thread overview]
Message-ID: <20020201051251.B10893@devserv.devel.redhat.com> (raw)
In-Reply-To: <OFBCE93B66.F7B9C14E-ON85256B52.006B8AB3@raleigh.ibm.com> <20020131125211.A8934@fib011235813.fsnet.co.uk> <20020201045518.A10893@devserv.devel.redhat.com> <20020131130913.A8997@fib011235813.fsnet.co.uk>
In-Reply-To: <20020131130913.A8997@fib011235813.fsnet.co.uk>; from thornber@fib011235813.fsnet.co.uk on Thu, Jan 31, 2002 at 01:09:13PM +0000
On Thu, Jan 31, 2002 at 01:09:13PM +0000, Joe Thornber wrote:
>
> Now our hero decides to PV move PV2 to PV4:
>
> 1. Suspend our LV (254:3), this starts queueing all io, and flushes
> all pending io.
But "flushes all pending io" is *far* from trivial. there's no current
kernel functionality for this, so you'll have to do "weird shit" that will
break easy and often.
Also "suspending" is rather dangerous because it can deadlock the machine
(think about the VM needing to write back dirty data on this LV in order to
make memory available for your move)...
Greetings,
Arjan van de Ven
next prev parent reply other threads:[~2002-02-01 4:13 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-31 13:54 [linux-lvm] Re: [lvm-devel] [ANNOUNCE] LVM reimplementation ready for beta testing Steve Pratt
2002-01-31 19:52 ` Steve Pratt
2002-01-31 12:52 ` Joe Thornber
2002-02-01 3:47 ` Joe Thornber
2002-02-01 3:55 ` [Evms-devel] " Arjan van de Ven
2002-02-01 9:55 ` Arjan van de Ven
2002-01-31 13:09 ` Joe Thornber
2002-02-01 4:04 ` Joe Thornber
2002-02-01 4:13 ` Arjan van de Ven [this message]
2002-02-01 10:12 ` Arjan van de Ven
2002-01-31 13:35 ` Joe Thornber
2002-02-01 4:31 ` [linux-lvm] " Joe Thornber
2002-02-01 5:06 ` [linux-lvm] Re: [Evms-devel] " Stephen C. Tweedie
2002-02-01 11:05 ` Stephen C. Tweedie
2002-02-01 8:32 ` [linux-lvm] " Alan Cox
2002-02-01 14:44 ` Alan Cox
2002-02-01 8:59 ` [linux-lvm] Re: [Evms-devel] " Stephen C. Tweedie
2002-02-01 14:58 ` Stephen C. Tweedie
2002-02-01 16:01 ` [evms-devel] [linux-lvm] " Kevin Corry
2002-02-01 21:59 ` Kevin Corry
2002-01-31 21:51 ` Joe Thornber
2002-02-03 6:22 ` Joe Thornber
2002-02-01 17:17 ` Alan Cox
2002-02-01 23:30 ` Alan Cox
2002-02-02 7:40 ` Andrew Clausen
2002-02-02 13:39 ` Andrew Clausen
2002-02-02 13:30 ` Alan Cox
2002-02-02 19:42 ` Alan Cox
2002-01-31 14:05 ` [linux-lvm] Re: [lvm-devel] [ANNOUNCE] LVM reimplementationre ady " Jeff Layton
2002-02-01 3:29 ` Heinz J . Mauelshagen
2002-02-01 9:43 ` Jeff Layton
2002-02-05 8:04 ` James Hawtin
2002-02-05 8:09 ` Patrick Caulfield
2002-02-05 11:13 ` Jesus Manuel NAVARRO LOPEZ
2002-02-05 12:28 ` [linux-lvm] (OT) Backups (was Re: LVM reimplementationre ady for beta testing...) Chad C. Walstrom
2002-02-06 13:13 ` [linux-lvm] Backup costs (was: LVM reimplementationre) Benjamin Scott
2002-02-06 13:39 ` Daniel Whicker
2002-02-06 13:46 ` James Mello
2002-02-06 14:35 ` Anders Widman
2002-02-07 3:01 ` Jesus Manuel NAVARRO LOPEZ
2002-02-07 3:17 ` Petro
2002-02-07 4:34 ` Jesus Manuel NAVARRO LOPEZ
2002-02-07 7:19 ` Petro
2002-02-07 7:54 ` Jesus Manuel NAVARRO LOPEZ
2002-02-07 3:55 ` Dieter Stueken
2002-02-06 13:46 ` Andreas Dilger
2002-02-06 13:48 ` Theo Van Dinter
2002-02-06 15:45 ` Austin Gonyou
2002-02-06 13:51 ` Petro
2002-02-06 13:52 ` Kirby C. Bohling
2002-02-06 13:55 ` Jeff Layton
2002-02-06 14:03 ` James Mello
2002-02-06 20:03 ` Jeff Layton
2002-02-06 20:08 ` James Mello
2002-02-06 20:11 ` Jeff Layton
2002-02-07 3:10 ` Jesus Manuel NAVARRO LOPEZ
2002-02-07 4:53 ` Jeff Layton
2002-02-07 5:31 ` James Hawtin
2002-02-07 17:05 ` Wolfgang Weisselberg
2002-02-08 20:04 ` James Hawtin
2002-02-07 3:03 ` Jesus Manuel NAVARRO LOPEZ
2002-02-07 3:17 ` Petro
2002-02-07 4:15 ` Jesus Manuel NAVARRO LOPEZ
2002-02-12 1:00 ` Marc MERLIN
2002-01-31 15:19 ` [Evms-devel] Re: [linux-lvm] Re: [lvm-devel] [ANNOUNCE] LVM reimplementation ready for beta testing Andrew Clausen
2002-01-31 21:18 ` Andrew Clausen
-- strict thread matches above, loose matches on Subject: below --
2002-01-30 14:23 [linux-lvm] " Joe Thornber
2002-01-30 15:54 ` [linux-lvm] Re: [lvm-devel] " Andreas Dilger
2002-01-30 16:05 ` Jim McDonald
2002-01-30 18:15 ` [linux-lvm] " Lars Kellogg-Stedman
2002-01-30 19:48 ` Daniel Phillips
2002-01-31 6:30 ` Heinz J . Mauelshagen
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