Matthew Ahrens
7f60329a26
Illumos 5987 - zfs prefetch code needs work
5987 zfs prefetch code needs work
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Paul Dagnelie <pcd@delphix.com>
Approved by: Gordon Ross <gordon.ross@nexenta.com>
References:
https://www.illumos.org/issues/5987 zfs prefetch code needs work
illumos/illumos-gate@cf6106c 5987 zfs prefetch code needs work
Porting notes:
- [module/zfs/dbuf.c]
- 5f6d0b6 Handle block pointers with a corrupt logical size
- [module/zfs/dmu_zfetch.c]
- c65aa5b Fix gcc missing parenthesis warnings
- 428870f Update core ZFS code from build 121 to build 141.
- 79c76d5 Change KM_PUSHPAGE -> KM_SLEEP
- b8d06fc Switch KM_SLEEP to KM_PUSHPAGE
- Account for ISO C90 - mixed declarations and code - warnings
- Module parameters (new/changed):
- Replaced zfetch_block_cap with zfetch_max_distance
(Max bytes to prefetch per stream (default 8MB; 8 * 1024 * 1024))
- Preserved zfs_prefetch_disable as 'int' for consistency with
existing Linux module options.
- [include/sys/trace_arc.h]
- Added new tracepoints
- DEFINE_ARC_BUF_HDR_EVENT(zfs_arc__sync__wait__for__async);
- DEFINE_ARC_BUF_HDR_EVENT(zfs_arc__demand__hit__predictive__prefetch);
- [man/man5/zfs-module-parameters.5]
- Updated man page
Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2016-01-12 09:02:33 -08:00
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2016-01-12 09:02:33 -08:00
2015-12-18 13:33:37 -08:00