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Illumos 5818 - zfs {ref}compressratio is incorrect with 4k sector size

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5818 zfs {ref}compressratio is incorrect with 4k sector size
Reviewed by: Alex Reece <alex@delphix.com>
Reviewed by: George Wilson <george@delphix.com>
Reviewed by: Richard Elling <richard.elling@richardelling.com>
Reviewed by: Steven Hartland <killing@multiplay.co.uk>
Approved by: Albert Lee <trisk@omniti.com>

References:
  https://www.illumos.org/issues/5818
  https://github.com/illumos/illumos-gate/commit/81cd5c5

Ported-by: Don Brady <don.brady@intel.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3432
This commit is contained in:
Matthew Ahrens
2015-05-19 22:14:01 -06:00
committed by Brian Behlendorf
parent 9c43027b3f
commit c3520e7f1f
7 changed files with 45 additions and 33 deletions
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cmd/ztest/ztest.c
+3 -17
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@@ -20,7 +20,7 @@
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011, 2014 by Delphix. All rights reserved.
* Copyright (c) 2011, 2015 by Delphix. All rights reserved.
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2013 Steven Hartland. All rights reserved.
*/
@@ -1022,21 +1022,6 @@ ztest_random_spa_version(uint64_t initial_version)
return (version);
}
/*
* Find the largest ashift used
*/
static uint64_t
ztest_spa_get_ashift(void) {
uint64_t i;
uint64_t ashift = SPA_MINBLOCKSHIFT;
vdev_t *rvd = ztest_spa->spa_root_vdev;
for (i = 0; i < rvd->vdev_children; i++) {
ashift = MAX(ashift, rvd->vdev_child[i]->vdev_ashift);
}
return (ashift);
}
static int
ztest_random_blocksize(void)
{
@@ -1047,7 +1032,8 @@ ztest_random_blocksize(void)
int maxbs = SPA_OLD_MAXBLOCKSHIFT;
if (spa_maxblocksize(ztest_spa) == SPA_MAXBLOCKSIZE)
maxbs = 20;
uint64_t block_shift = ztest_random(maxbs - ztest_spa_get_ashift() + 1);
uint64_t block_shift =
ztest_random(maxbs - ztest_spa->spa_max_ashift + 1);
return (1 << (SPA_MINBLOCKSHIFT + block_shift));
}