[Bug 223803] zio_done() panic on system with cache devices

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=223803

Shiva <shiva.bhanujan at quorum.com> changed:

           What    |Removed                     |Added
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                 CC|                            |shiva.bhanujan at quorum.com

--- Comment #1 from Shiva <shiva.bhanujan at quorum.com> ---
In our current setup, the source Filer sends snapshots to the target Filer
periodically, about 20-50 per day.  The crash is quite reproducible, although
not guaranteed to show up after X number of snapshots.

Setting the 'secondarycache' to 'metadata', as opposed to 'ALL' does prevent
the frequent crashes. But obviously, the L2ARC isn't caching user data, as a
result of which, reads end up on disk.  ZFS performance w/o L2ARC is rather
abysmal.

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