Re: ZFSKnownProblems - needs revision?


Hi,

in one production case (1), haven't seen panics or deadlocks for a long time, yet on another much more powerful machine (2), I could not get rid of "vm_thread_new: kstack allocation failed", ultimately rendering the machine useless pretty fast. This was at least till RELENG_7/november (7.1-PRERELEASE), where I decided to stop the zfs experiment for now and went back to ufs. trying to understand now if 7.2 is worth a new try, or if, for that matter, the only reasonable wait is until 8.0.

perhaps worth of note, the kstack errors still occurred (albeit after more time) with all zpools exported (and system rebooted) but the zfs.ko still loaded. only after rebooting without zfs_load="YES" the server began to work seemlessly for months.

I'm asking myself if/how important the underlying driver/provider (mfi, mpt, ad, ciss, etc..) can be in regard to the remaining/ recurring problems with zfs.. (since I've seen so different behaviors with different machines...)?

(1) Homebrewn Opteron / 2GB RAM / SATA ad / 7.1-PRERELEASE w. usual tuning, one zpool on a SATA mirror for backups via rsync of several servers
(2) DELL PE 1950 1 Quad-Xeon / 8GB RAM / LSI mpt / 7.1-PRERELEASE w. many tunings tried, one zpool on a partition on top of HW RAID 1, moderately loaded mailserver box running courier and mysql

Regards,

Lorenzo

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