Messages in this thread | | | Date | Wed, 17 Oct 2012 09:31:21 +0200 | From | Laurent CARON <> | Subject | Re: Strange crash on Dell R720xd |
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On Tue, Oct 16, 2012 at 10:58:49AM -0700, Dan Williams wrote: > I think this may be a bug in __raid_run_ops that is only possible when > raid offload and CONFIG_MULTICORE_RAID456 are enabled. I'm thinking > the descriptor is completed and recycled to another requester in the > space between these two events: > > ops_run_compute(); > > /* terminate the chain if reconstruct is not set to be run */ > if (tx && !test_bit(STRIPE_OP_RECONSTRUCT, &ops_request)) > async_tx_ack(tx); > > ...don't use the experimental CONFIG_MULTICORE_RAID456 even if you > leave IOAT DMA disabled. A rework of the raid operation dma chaining > is in progress, but may not be ready for a while.
Hi,
I usually don't use CONFIG_MULTICORE_RAID456 as it proved to be sluggish and/or unstable in my experience, so I should be pretty safe letting I/O AT DMA disabled for now on those bosex.
Thanks
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