openslx/kernel-qcow2-linux.git - In-kernel qcow2 (Kernel part)

	Commit message (Collapse)	Author	Age	Files	Lines
*	dm snapshot: extend exception store functions	Jonathan Brassow	2009-01-06	1	-6/+0
\| \| \| \| \| \| \| \| \|	Supply dm_add_exception as a callback to the read_metadata function. Add a status function ready for a later patch and name the functions consistently. Signed-off-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
*	dm snapshot: rename struct exception_store	Jonathan Brassow	2009-01-06	1	-1/+1
\| \| \| \| \| \| \|	Rename struct exception_store to dm_exception_store. Signed-off-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
*	dm snapshot: separate out exception store interface	Jonathan Brassow	2009-01-06	1	-120/+1
\| \| \| \| \| \| \| \| \| \| \| \| \|	Pull structures that bridge the gap between snapshot and exception store out of dm-snap.h and put them in a new .h file - dm-exception-store.h. This file will define the API for new exception stores. Ultimately, dm-snap.h is unnecessary, since only dm-snap.c should be using it. Signed-off-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
*	dm snapshot: wait for chunks in destructor	Mikulas Patocka	2008-10-30	1	-0/+2
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|	If there are several snapshots sharing an origin and one is removed while the origin is being written to, the snapshot's mempool may get deleted while elements are still referenced. Prior to dm-snapshot-use-per-device-mempools.patch the pending exceptions may still have been referenced after the snapshot was destroyed, but this was not a problem because the shared mempool was still there. This patch fixes the problem by tracking the number of mempool elements in use. The scenario: - You have an origin and two snapshots 1 and 2. - Someone writes to the origin. - It creates two exceptions in the snapshots, snapshot 1 will be primary exception, snapshot 2's pending_exception->primary_pe will point to the exception in snapshot 1. - The exceptions are being relocated, relocation of exception 1 finishes (but it's pending_exception is still allocated, because it is referenced by an exception from snapshot 2) - The user lvremoves snapshot 1 --- it calls just suspend (does nothing) and destructor. md->pending is zero (there is no I/O submitted to the snapshot by md layer), so it won't help us. - The destructor waits for kcopyd jobs to finish on snapshot 1 --- but there are none. - The destructor on snapshot 1 cleans up everything. - The relocation of exception on snapshot 2 finishes, it drops reference on primary_pe. This frees its primary_pe pointer. Primary_pe points to pending exception created for snapshot 1. So it frees memory into non-existing mempool. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
*	dm: remove dm header from targets	Mikulas Patocka	2008-10-21	1	-1/+1
\| \| \| \| \| \| \| \|	Change #include "dm.h" to #include <linux/device-mapper.h> in all targets. Targets should not need direct access to internal DM structures. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
*	dm snapshot: drop unused last_percent	Mikulas Patocka	2008-10-21	1	-3/+0
\| \| \| \| \| \| \| \|	The last_percent field is unused - remove it. (It dates from when events were triggered as each X% filled up.) Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
*	dm snapshot: use per device mempools	Mikulas Patocka	2008-07-21	1	-0/+2
\| \| \| \| \| \| \| \| \| \|	Change snapshot per-module mempool to per-device mempool. Per-module mempools could cause a deadlock if multiple snapshot devices are stacked above each other. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
*	dm snapshot: track snapshot reads	Mikulas Patocka	2008-07-21	1	-0/+9
\| \| \| \| \| \| \| \| \| \| \| \|	Whenever a snapshot read gets mapped through to the origin, track it in a per-snapshot hash table indexed by chunk number, using memory allocated from a new per-snapshot mempool. We need to track these reads to avoid race conditions which will be fixed by patches that follow. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
*	dm kcopyd: clean interface	Heinz Mauelshagen	2008-04-25	1	-1/+1
\| \| \| \| \| \| \|	Clean up the kcopyd interface to prepare for publishing it in include/linux. Signed-off-by: Heinz Mauelshagen <hjm@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
*	dm snapshot: store pointer to target instance	Mikulas Patocka	2008-04-25	1	-1/+1
\| \| \| \| \| \| \|	Save pointer to dm_target in dm_snapshot structure. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
*	dm snapshot: combine consecutive exceptions in memory	Milan Broz	2008-02-08	1	-2/+48
\| \| \| \| \| \| \| \| \|	Provided sector_t is 64 bits, reduce the in-memory footprint of the snapshot exception table by the simple method of using unused bits of the chunk number to combine consecutive entries. Signed-off-by: Milan Broz <mbroz@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
*	dm: use kmem_cache macro	Alasdair G Kergon	2007-07-13	1	-3/+3
\| \| \| \| \| \| \| \| \| \|	Use new KMEM_CACHE() macro and make the newly-exposed structure names more meaningful. Also remove some superfluous casts and inlines (let a modern compiler be the judge). Acked-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
*	[PATCH] dm snapshot: add workqueue	Alasdair G Kergon	2006-10-03	1	-0/+12
\| \| \| \| \| \| \| \| \| \| \| \|	Add a workqueue so that I/O can be queued up to be flushed from a separate thread (e.g. if local interrupts are disabled). A new per-snapshot spinlock pe_lock is introduced to protect queued_bios. Signed-off-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
*	[PATCH] dm snapshot: allow zero chunk_size	Mark McLoughlin	2006-10-03	1	-3/+2
\| \| \| \| \| \| \| \| \| \| \| \|	The chunk size of snapshots cannot be changed so it is redundant to require it as a parameter when activating an existing snapshot. Allow a value of zero in this case and ignore it. For a new snapshot, use a default value if zero is specified. Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
*	[PATCH] device-mapper snapshot: load metadata on creation	Alasdair G Kergon	2006-02-01	1	-1/+3
\| \| \| \| \| \| \| \| \| \| \| \| \| \|	Move snapshot metadata loading to happen when the table is created instead of when the device is resumed. Writes to the origin device don't trigger exceptions until each snapshot table becomes active when resume() is called on each snapshot. If you're using lvm2, for this patch to work properly you should update to lvm2 version 2.02.01 or later and device-mapper version 1.02.02 or later. Signed-off-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
*	Linux-2.6.12-rc2	Linus Torvalds	2005-04-17	1	-0/+161
	Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!