From: Mike Snitzer <snitzer@redhat.com>
To: dm-devel@redhat.com
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH v4 00/13] snapshot-merge target
Date: Fri, 20 Nov 2009 15:27:40 -0500 [thread overview]
Message-ID: <1258748873-24185-1-git-send-email-snitzer@redhat.com> (raw)
The snapshot-merge target allows a snapshot to be merged back into the
snapshot's origin device.
One expected use of snapshot merging is the rollback of a root
filesystem after system upgrades (e.g.: yum update). snapshot-merge
enables "system rollback" support for any filesystem that is using the
associated DM/LVM devices.
* "[PATCH v4 05/13] dm snapshot: add snapshot-merge target" adds further
documentation to: Documentation/device-mapper/snapshot.txt
* All patch headers have been revised/audited for added clarity.
* Both the latest handover (v10) and origin-write patch have been
included in this series.
* Aside from snapshot-merge specific testing these patches have
survived 75+ iterations of lvm2's testsuite without any failures.
The test kernel was 2.6.32-rc8 and lvm2 was 2.0.55 (with udev_sync
enabled and dmeventd disabled).
The snapshot-merge quilt tree is maintained here:
http://people.redhat.com/msnitzer/patches/snapshot-merge/kernel/2.6.33/
For LVM2 support please see:
http://people.redhat.com/msnitzer/patches/snapshot-merge/lvm2/LVM2-2.02.55/
Mike Snitzer (3):
dm snapshot: allow live exception store handover between tables
dm exception store: snapshot-merge usage accounting
dm snapshot: merge a linear region of chunks using one large IO
Mikulas Patocka (10):
dm snapshot: rework writing to snapshot origin
dm exception store: add snapshot-merge specific methods
dm snapshot: add snapshot-merge target
dm snapshot: merge target should not allocate new exceptions
dm snapshot: do not allow more than one merging snapshot.
dm snapshot: the merge procedure
dm snapshot: queue writes to an area that is actively being merged
dm snapshot: do not merge a chunk until active writes to it finish
dm snapshot: make exceptions in other snapshots when merging
dm snapshot: redirect accesses to origin if merging snap invalidated
Documentation/device-mapper/snapshot.txt | 52 ++-
drivers/md/dm-exception-store.h | 27 +
drivers/md/dm-snap-persistent.c | 91 ++++-
drivers/md/dm-snap.c | 827 ++++++++++++++++++++++++------
4 files changed, 839 insertions(+), 158 deletions(-)
next reply other threads:[~2009-11-20 20:27 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-20 20:27 Mike Snitzer [this message]
2009-11-20 20:27 ` [PATCH v4 01/13] dm snapshot: allow live exception store handover between tables Mike Snitzer
2009-11-20 20:27 ` [PATCH v4 02/13] dm snapshot: rework writing to snapshot origin Mike Snitzer
2009-11-20 20:27 ` [PATCH v4 03/13] dm exception store: add snapshot-merge specific methods Mike Snitzer
2009-11-20 20:27 ` [PATCH v4 04/13] dm exception store: snapshot-merge usage accounting Mike Snitzer
2009-11-20 20:27 ` [PATCH v4 05/13] dm snapshot: add snapshot-merge target Mike Snitzer
2009-11-20 20:27 ` [PATCH v4 06/13] dm snapshot: merge target should not allocate new exceptions Mike Snitzer
2009-11-20 20:54 ` Mike Snitzer
2009-11-20 21:02 ` Mike Snitzer
2009-11-20 20:27 ` [PATCH v4 07/13] dm snapshot: do not allow more than one merging snapshot Mike Snitzer
2009-11-20 21:04 ` Mike Snitzer
2009-11-20 20:27 ` [PATCH v4 08/13] dm snapshot: the merge procedure Mike Snitzer
2009-11-20 20:27 ` [PATCH v4 09/13] dm snapshot: queue writes to an area that is actively being merged Mike Snitzer
2009-11-20 20:27 ` [PATCH v4 10/13] dm snapshot: do not merge a chunk until active writes to it finish Mike Snitzer
2009-11-20 20:27 ` [PATCH v4 11/13] dm snapshot: make exceptions in other snapshots when merging Mike Snitzer
2009-11-20 20:27 ` [PATCH v4 12/13] dm snapshot: redirect accesses to origin if merging snap invalidated Mike Snitzer
2009-11-20 20:27 ` [PATCH v4 13/13] dm snapshot: merge a linear region of chunks using one large IO Mike Snitzer
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