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Bug #13908

closed

disable kernel FPU by default until it is stable

Added by Joshua M. Clulow 5 months ago. Updated 5 months ago.

Status:
Closed
Priority:
High
Category:
kernel
Start date:
Due date:
% Done:

100%

Estimated time:
Difficulty:
Medium
Tags:
Gerrit CR:

Description

We have had a series of issues with the kernel FPU mechanism, the most recent of which is described in #13902. To allow more time for diagnostics, we should surgically disable the use of mechanism within ZFS. We'll leave a tunable that users may set in /etc/system if they wish to enable the mechanism at their own risk; e.g., for debugging purposes.


Related issues

Related to illumos gate - Bug #13717: kernel fpu use can still lead to panicClosed

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Related to illumos gate - Feature #12478: installctx needs kpreempt_disable protectionClosedPatrick Mooney

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Related to illumos gate - Bug #13902: Fix for 13717 may break 8-disk raidz2ClosedDan McDonald

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