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| author | Warner Losh <imp@FreeBSD.org> | 2017-10-30 03:25:22 +0000 |
|---|---|---|
| committer | Warner Losh <imp@FreeBSD.org> | 2017-10-30 03:25:22 +0000 |
| commit | 50ee2e2aabaab2ba54ef1c091b015a1bd2e2b927 (patch) | |
| tree | e4a913d3102c628461675233593ea9a694fe92b5 /sys/contrib/ncsw | |
| parent | 0255bc13705fdbb438ee23f11b46a93121cddd59 (diff) | |
| download | src-50ee2e2aabaab2ba54ef1c091b015a1bd2e2b927.tar.gz src-50ee2e2aabaab2ba54ef1c091b015a1bd2e2b927.zip | |
Send IDLE IMMEDIATE for warm boot.
We must send either an IDLE IMMEDIATE or a STANDBY IMMEDIATE to drives
on warm boot so their SMART and other volatile data is
persisted. However, for a warm boot we don't want to send STANDBY
IMMEDIATE to some spinning drives because they will spin down. If
there's a lot of these drives on the system, that can cause a
thundering herd problem at startup time (that in extreme cases causes
timeout in device discovery).
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D12811
Notes
Notes:
svn path=/head/; revision=325117
Diffstat (limited to 'sys/contrib/ncsw')
0 files changed, 0 insertions, 0 deletions