37f03da8ba
Deleting a clone requires finding blocks are clone-only, not shared with the snapshot. This was done by traversing the entire block tree which results in a large performance penalty for sparsely written clones. This is new method keeps track of clone blocks when they are modified in a "Livelist" so that, when it’s time to delete, the clone-specific blocks are already at hand. We see performance improvements because now deletion work is proportional to the number of clone-modified blocks, not the size of the original dataset. Reviewed-by: Sean Eric Fagan <sef@ixsystems.com> Reviewed-by: Matt Ahrens <matt@delphix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Serapheim Dimitropoulos <serapheim@delphix.com> Signed-off-by: Sara Hartse <sara.hartse@delphix.com> Closes #8416
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
*
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
* or http://www.opensolaris.org/os/licensing.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
/*
|
|
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
|
|
* Copyright (c) 2012, 2018 by Delphix. All rights reserved.
|
|
*/
|
|
|
|
#include <sys/bplist.h>
|
|
#include <sys/zfs_context.h>
|
|
|
|
|
|
void
|
|
bplist_create(bplist_t *bpl)
|
|
{
|
|
mutex_init(&bpl->bpl_lock, NULL, MUTEX_DEFAULT, NULL);
|
|
list_create(&bpl->bpl_list, sizeof (bplist_entry_t),
|
|
offsetof(bplist_entry_t, bpe_node));
|
|
}
|
|
|
|
void
|
|
bplist_destroy(bplist_t *bpl)
|
|
{
|
|
list_destroy(&bpl->bpl_list);
|
|
mutex_destroy(&bpl->bpl_lock);
|
|
}
|
|
|
|
void
|
|
bplist_append(bplist_t *bpl, const blkptr_t *bp)
|
|
{
|
|
bplist_entry_t *bpe = kmem_alloc(sizeof (*bpe), KM_SLEEP);
|
|
|
|
mutex_enter(&bpl->bpl_lock);
|
|
bpe->bpe_blk = *bp;
|
|
list_insert_tail(&bpl->bpl_list, bpe);
|
|
mutex_exit(&bpl->bpl_lock);
|
|
}
|
|
|
|
/*
|
|
* To aid debugging, we keep the most recently removed entry. This way if
|
|
* we are in the callback, we can easily locate the entry.
|
|
*/
|
|
static bplist_entry_t *bplist_iterate_last_removed;
|
|
|
|
void
|
|
bplist_iterate(bplist_t *bpl, bplist_itor_t *func, void *arg, dmu_tx_t *tx)
|
|
{
|
|
bplist_entry_t *bpe;
|
|
|
|
mutex_enter(&bpl->bpl_lock);
|
|
while ((bpe = list_head(&bpl->bpl_list))) {
|
|
bplist_iterate_last_removed = bpe;
|
|
list_remove(&bpl->bpl_list, bpe);
|
|
mutex_exit(&bpl->bpl_lock);
|
|
func(arg, &bpe->bpe_blk, tx);
|
|
kmem_free(bpe, sizeof (*bpe));
|
|
mutex_enter(&bpl->bpl_lock);
|
|
}
|
|
mutex_exit(&bpl->bpl_lock);
|
|
}
|
|
|
|
void
|
|
bplist_clear(bplist_t *bpl)
|
|
{
|
|
bplist_entry_t *bpe;
|
|
|
|
mutex_enter(&bpl->bpl_lock);
|
|
while ((bpe = list_head(&bpl->bpl_list))) {
|
|
bplist_iterate_last_removed = bpe;
|
|
list_remove(&bpl->bpl_list, bpe);
|
|
kmem_free(bpe, sizeof (*bpe));
|
|
}
|
|
mutex_exit(&bpl->bpl_lock);
|
|
}
|