[dm-devel] dm_cache BUG() after power loss

Steinar H. Gunderson steinar+kernel at gunderson.no
Wed Oct 17 14:43:14 UTC 2018


On Tue, Oct 09, 2018 at 06:00:51PM +0200, Steinar H. Gunderson wrote:
> We had a power loss event, and when a server with dm-cache came up again,
> it paniced (see below for the panic text). I couldn't find any other way to
> remedy this than to blow away the metadata volume, which I assumed was safe
> as the cache is in writethrough mode (after several catastrophic events with
> dm-cache earlier, I don't trust writeback anymore). Unfortunately, this was
> seemingly not enough, as the underlying devices came back with various levels
> of corruption and eventually had to be restored from backup. (It's running
> without dm-cache now.)

Is there some other place I should report this? The machine is awfully slow
without its cache, so it's sort of annoying to run without. :-)

/* Steinar */
-- 
Homepage: https://www.sesse.net/




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