[Bug 158197] [geom] geom_cache with size>1000 leads to panics

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=158197

--- Comment #8 from eugen at grosbein.net ---
Today I had the same panic with 8.4-STABLE and single gcache instance serving
disk slice containing the system. Unfortunally, crashdump was not generated but
I have screenshot with KDB_TRACE:

http://www.grosbein.net/img/panic-gcache.jpg

After reboot:

# gcache list
Geom name: ca0
WroteBytes: 0
Writes: 0
CacheFull: 0
CacheMisses: 20
CacheHits: 88
CacheReadBytes: 324096
CacheReads: 108
ReadBytes: 328192
Reads: 116
InvalidEntries: 0
UsedEntries: 9
Entries: 9
TailOffset: 500107182080
BlockSize: 131072
Size: 1024
Providers:
1. Name: cache/ca0
   Mediasize: 500107280896 (465G)
   Sectorsize: 512
   Mode: r0w0e0
Consumers:
1. Name: mirror/gm0s1
   Mediasize: 500107281408 (465G)
   Sectorsize: 512
   Stripesize: 0
   Stripeoffset: 258048
   Mode: r0w0e0

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