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| author | mav <mav@FreeBSD.org> | 2017-07-26 16:14:05 +0000 |
|---|---|---|
| committer | mav <mav@FreeBSD.org> | 2017-07-26 16:14:05 +0000 |
| commit | f0882293abab53b447ecd49ce97c8200e69c03b2 (patch) | |
| tree | 0f72defadd9e9b2b270bf7d7c945f67d125d59fb /cddl/contrib/opensolaris/lib/libzpool/common/kernel.c | |
| parent | 47b82b1986579f97f82435ad6ee165c4a380cad4 (diff) | |
| download | FreeBSD-src-f0882293abab53b447ecd49ce97c8200e69c03b2.zip FreeBSD-src-f0882293abab53b447ecd49ce97c8200e69c03b2.tar.gz | |
MFC r315896: MFV r315290, r315291: 7303 dynamic metaslab selection
illumos/illumos-gate@8363e80ae72609660f6090766ca8c2c18aa53f0c
https://github.com/illumos/illumos-gate/commit/8363e80ae72609660f6090766ca8c2c18
https://www.illumos.org/issues/7303
This change introduces a new weighting algorithm to improve metaslab selection
.
The new weighting algorithm relies on the SPACEMAP_HISTOGRAM feature. As a res
ult,
the metaslab weight now encodes the type of weighting algorithm used
(size-based vs segment-based).
This also introduce a new allocation tracing facility and two new dcmds to hel
p
debug allocation problems. Each zio now contains a zio_alloc_list_t structure
that is populated as the zio goes through the allocations stage. Here's an
example of how to use the tracing facility:
> c5ec000::print zio_t io_alloc_list | ::walk list | ::metaslab_trace
MSID DVA ASIZE WEIGHT RESULT VDEV
- 0 400 0 NOT_ALLOCATABLE ztest.0a
- 0 400 0 NOT_ALLOCATABLE ztest.0a
- 0 400 0 ENOSPC ztest.0a
- 0 200 0 NOT_ALLOCATABLE ztest.0a
- 0 200 0 NOT_ALLOCATABLE ztest.0a
- 0 200 0 ENOSPC ztest.0a
1 0 400 1 x 8M 17b1a00 ztest.0a
> 1ff2400::print zio_t io_alloc_list | ::walk list | ::metaslab_trace
MSID DVA ASIZE WEIGHT RESULT VDEV
- 0 200 0 NOT_ALLOCATABLE mirror-2
- 0 200 0 NOT_ALLOCATABLE mirror-0
1 0 200 1 x 4M 112ae00 mirror-1
- 1 200 0 NOT_ALLOCATABLE mirror-2
- 1 200 0 NOT_ALLOCATABLE mirror-0
1 1 200 1 x 4M 112b000 mirror-1
- 2 200 0 NOT_ALLOCATABLE mirror-2
If the metaslab is using segment-based weighting then the WEIGHT column will
display the number of segments available in the bucket where the allocation
attempt was made.
Author: George Wilson <george.wilson@delphix.com>
Reviewed by: Alex Reece <alex@delphix.com>
Reviewed by: Chris Siden <christopher.siden@delphix.com>
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Paul Dagnelie <paul.dagnelie@delphix.com>
Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Reviewed by: Don Brady <don.brady@intel.com>
Approved by: Richard Lowe <richlowe@richlowe.net>
Diffstat (limited to 'cddl/contrib/opensolaris/lib/libzpool/common/kernel.c')
| -rw-r--r-- | cddl/contrib/opensolaris/lib/libzpool/common/kernel.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/cddl/contrib/opensolaris/lib/libzpool/common/kernel.c b/cddl/contrib/opensolaris/lib/libzpool/common/kernel.c index a7fc128..701f0b4 100644 --- a/cddl/contrib/opensolaris/lib/libzpool/common/kernel.c +++ b/cddl/contrib/opensolaris/lib/libzpool/common/kernel.c @@ -97,6 +97,11 @@ kstat_create(char *module, int instance, char *name, char *class, /*ARGSUSED*/ void +kstat_named_init(kstat_named_t *knp, const char *name, uchar_t type) +{} + +/*ARGSUSED*/ +void kstat_install(kstat_t *ksp) {} |
