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| author | Alexander Motin <mav@FreeBSD.org> | 2018-01-22 05:57:14 +0000 |
|---|---|---|
| committer | Alexander Motin <mav@FreeBSD.org> | 2018-01-22 05:57:14 +0000 |
| commit | 1dbc0fc3528e63065498ff17cb4dd76efba3a506 (patch) | |
| tree | 96f80cffe9d67315dfad9209ac1c94a986754979 /cddl/contrib/opensolaris/cmd | |
| parent | 4eb2803697e3ce8644826bd4db8cc6d97dae89cd (diff) | |
| parent | 2d224f61165a61e97f4f45286ebe1e7a9fafce83 (diff) | |
| download | src-1dbc0fc3528e63065498ff17cb4dd76efba3a506.tar.gz src-1dbc0fc3528e63065498ff17cb4dd76efba3a506.zip | |
MFV r328253: 8835 Speculative prefetch in ZFS not working for misaligned reads
illumos/illumos-gate@5cb8d943bc8513c6230589aad5a409d58b0297cb
https://www.illumos.org/issues/8835:
Sequential reads not aligned to block size are not detected by ZFS
prefetcher as sequential, killing prefetch and severely hurting
performance. It is caused by dmu_zfetch() in case of misaligned
sequential accesses being called with overlap of one block.
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Allan Jude <allanjude@freebsd.org>
Approved by: Gordon Ross <gwr@nexenta.com>
Author: Alexander Motin <mav@FreeBSD.org>
Notes
Notes:
svn path=/head/; revision=328254
Diffstat (limited to 'cddl/contrib/opensolaris/cmd')
0 files changed, 0 insertions, 0 deletions