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Alexander Motin 2d224f6116 8835 Speculative prefetch in ZFS not working for misaligned reads

illumos/illumos-gate@5cb8d943bc

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>

2018-01-22 05:55:43 +00:00

cmd

8652 Tautological comparisons with ZPROP_INVAL

2018-01-22 04:48:14 +00:00

common

8713 Buffer overflow in dsl_dataset_name()

2017-11-09 18:06:18 +00:00

head

5066 remove support for non-ANSI compilation

2014-08-20 06:29:42 +00:00

lib

8652 Tautological comparisons with ZPROP_INVAL